Criterion validity, and interunit and between-day reliability of the FLEX for measuring barbell velocity during commonly used resistance training exercises

Journal article


Weakley, Jonathon, Chalkley, Daniel, Johnston, Rich, García-Ramos, Amador, Townshend, Andrew, Dorrell, Harry, Pearson, Madison, Morrison, Matthew and Cole, Michael. (2020) Criterion validity, and interunit and between-day reliability of the FLEX for measuring barbell velocity during commonly used resistance training exercises. Journal of Strength and Conditioning Research. 34(6), pp. 1519 - 1524. https://doi.org/10.1519/JSC.0000000000003592
AuthorsWeakley, Jonathon, Chalkley, Daniel, Johnston, Rich, García-Ramos, Amador, Townshend, Andrew, Dorrell, Harry, Pearson, Madison, Morrison, Matthew and Cole, Michael
Abstract

The aim of this study was to assess the criterion validity, interunit reliability (accounting for technological and biological variance), and between-day reliability of a novel optic laser device (FLEX) for quantifying mean concentric velocity. To assess the validity against a three-dimensional motion capture system and interunit reliability with both technological and biological variation, 18 men and women completed repetitions at 20, 40, 60, 80, 90, and 100% of one repetition maximum in the free-weight barbell back squat and bench press. To assess interunit (technological only) reliability, a purpose-built, calibrated rig completed a set protocol with 2 devices. To assess between-day reliability of the technology, the same protocol was repeated 21 days later. Standardized bias, typical error of the estimate (TEE; %), and Pearson's correlation coefficient (r) were used to assess validity, whereas typical error and coefficient of variation (CV%) were calculated for reliability. Overall, TEE (±90 CL) between the FLEX and criterion measure was 0.03 (±0.004) and 0.04 (±0.005) m·s−1 in the back squat and bench press, respectively. For measures of reliability, overall interunit technological variance (CV% [± 90% confidence interval]) was 3.96% (3.83–4.12) but increased to 9.82% (9.31–10.41) and 9.83% (9.17–10.61) in the back squat and bench press, respectively, when biological variance was introduced. Finally, the overall between-day reliability was 3.77% (3.63–3.91). These findings demonstrate that the FLEX provides valid and reliable mean concentric velocity outputs across a range of velocities. Thus, practitioners can confidently implement this device for the monitoring and prescription of resistance training loads.

Keywordsback squat; bench press; mean concentric velocity; velocity-based training; measurement
Year2020
JournalJournal of Strength and Conditioning Research
Journal citation34 (6), pp. 1519 - 1524
PublisherLippincott Williams and Wilkins
ISSN1533-4287
Digital Object Identifier (DOI)https://doi.org/10.1519/JSC.0000000000003592
Scopus EID2-s2.0-85085538867
Page range1519 - 1524
Research GroupSchool of Behavioural and Health Sciences
Place of publicationUnited States of America
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Conway, Zachary, Blackmore, Tim, Silburn, Peter A. and Cole, Michael H.. (2018) Dynamic balance control during stair negotiation for older adults and people with Parkinson disease. Human Movement Science. 59, pp. 30 - 36. https://doi.org/10.1016/j.humov.2018.03.012
Bigger, stronger, faster, fitter: The differences in physical qualities of school and academy rugby union players
Jones, Ben, Weaving, Dan, Tee, Jason, Darrall-Jones, Joshua David, Weakley, Jonathon, Phibbs, Padraic J., Read, Dale B., Roe, Gregory A. B., Hendricks, Sharief and Till, Kevin. (2018) Bigger, stronger, faster, fitter: The differences in physical qualities of school and academy rugby union players. Journal of Sports Sciences. 36(21), pp. 2399 - 2404. https://doi.org/10.1080/02640414.2018.1458589
Wearable technology reveals gait compensations, unstable walking patterns and fatigue in people with multiple sclerosis
Psarakis, Michael, Greene, David A., Cole, Michael H., Lord, Stephen R., Hoang, Phu and Brodie, Matthew A. D.. (2018) Wearable technology reveals gait compensations, unstable walking patterns and fatigue in people with multiple sclerosis. Physiological Measurement. 39(7), pp. 1 - 13. https://doi.org/10.1088/1361-6579/aac0a3
Applied sport science of Australian football: A systematic review
Johnston, Richard, Black, Georgia M., Harrison, Peter W., Murray, Nick B. and Austin, Damien J.. (2018) Applied sport science of Australian football: A systematic review. Sports Medicine. 48(7), pp. 1673 - 1694. https://doi.org/10.1007/s40279-018-0919-z
Physical fitness and peak running periods during female Australian football match-play
Black, Georgia M., Gabbett, Tim J., Johnston, Rich D., Cole, Michael H., Naughton, Geraldine and Dawson, Brian. (2018) Physical fitness and peak running periods during female Australian football match-play. Science and Medicine in Football. 2(3), pp. 246 - 251. https://doi.org/10.1080/24733938.2018.1426103
Relationship between 2 standardized tackling proficiency tests and rugby league match-play tackle performance
Speranza, Michael J. A., Gabbett, Tim J., Greene, David A., Johnston, Rich D. and Townshend, Andrew D.. (2018) Relationship between 2 standardized tackling proficiency tests and rugby league match-play tackle performance. International Journal of Sports Physiology and Performance. 13(6), pp. 770 - 776. https://doi.org/10.1123/ijspp.2017-0593
Gait characteristics and falls in Parkinson's disease: A systematic review and meta-analysis
Creaby, Mark W. and Cole, Michael H.. (2018) Gait characteristics and falls in Parkinson's disease: A systematic review and meta-analysis. Parkinsonism and Related Disorders. 57, pp. 1 - 8. https://doi.org/10.1016/j.parkreldis.2018.07.008
Regulation of locomotor pointing across the lifespan: Investigating age-related influences on perceptual-motor coupling
van Andel, Steven, Cole, Michael H. and Pepping, Gert-Jan. (2018) Regulation of locomotor pointing across the lifespan: Investigating age-related influences on perceptual-motor coupling. PLoS ONE. 13(7), pp. 1 - 16. https://doi.org/10.1371/journal.pone.0200244
Evidence of compensatory joint kinetics during stair ascent and descent in Parkinson's disease
Conway, Zachary, Silburn, Peter A., Blackmore, Tim and Cole, Michael H.. (2017) Evidence of compensatory joint kinetics during stair ascent and descent in Parkinson's disease. Gait & Posture. 52, pp. 33 - 39. https://doi.org/10.1016/j.gaitpost.2016.11.017
Imposed faster and slower walking speeds influence gait stability differently in Parkinson fallers
Cole, Michael H., Sweeney, Matthew, Conway, Zachary, Blackmore, Tim and Silburn, Peter A.. (2017) Imposed faster and slower walking speeds influence gait stability differently in Parkinson fallers. Archives of Physical Medicine and Rehabilitation. 98(4), pp. 639 - 648. https://doi.org/10.1016/j.apmr.2016.11.008
Automatic detection of pitching and throwing events in baseball with inertial measurement sensors
Murray, Nick B., Black, Georgia M., Whiteley, Rod J., Gahan, Peter, Cole, Michael H., Utting, Andy and Gabbett, Tim J.. (2017) Automatic detection of pitching and throwing events in baseball with inertial measurement sensors. International Journal of Sports Physiology and Performance. 12(4), pp. 533 - 537. https://doi.org/10.1123/ijspp.2016-0212
Calculating acute: chronic workload ratios using exponentially weighted moving averages provides a more sensitive indicator of injury likelihood than rolling averages
Murray, Nicholas, Gabbett, Tim, Townshend, Andrew and Blanch, Peter. (2017) Calculating acute: chronic workload ratios using exponentially weighted moving averages provides a more sensitive indicator of injury likelihood than rolling averages. British Journal of Sports Medicine. 51(9), pp. 749 - 754. https://doi.org/10.1136/bjsports-2016-097152
Changes in rugby league tackling ability during a competitive season: the relationship with strength and power qualities
Speranza, Michael, Gabbett, Tim, Greene, David, Johnston, Richard and Sheppard, Jeremy. (2017) Changes in rugby league tackling ability during a competitive season: the relationship with strength and power qualities. Journal of Strength and Conditioning Research. 31(12), pp. 3311 - 3318. https://doi.org/10.1519/JSC.0000000000001540
Automatic detection of pitching and throwing events in baseball with inertial measurement sensors
Murray, Nick B., Black, Georgia M., Whiteley, Rod J., Gahan, Peter, Cole, Michael H., Utting, Andy and Gabbett, Tim J.. (2017) Automatic detection of pitching and throwing events in baseball with inertial measurement sensors. International Journal of Sports Physiology and Performance. 12(4), pp. 533 - 537. https://doi.org/10.1123/ijspp.2016-0212
Validity of daily and weekly self-reported training load measures in adolescent athletes
Phibbs, Padraic J., Roe, Gregory, Jones, Ben, Read, Dale B., Weakley, Jonathon, Darrall-Jones, Joshua and Till, Kevin. (2017) Validity of daily and weekly self-reported training load measures in adolescent athletes. Journal of Strength and Conditioning Research. 31(4), pp. 1121 - 1126. https://doi.org/10.1519/JSC.0000000000001708
Imposed faster and slower walking speeds influence gait stability differently in Parkinson fallers
Cole, Michael H., Sweeney, Matthew, Conway, Zachary J., Blackmore, Tim and Silburn, Peter A.. (2017) Imposed faster and slower walking speeds influence gait stability differently in Parkinson fallers. Archives of Physical Medicine and Rehabilitation. 98(4), pp. 639 - 648. https://doi.org/10.1016/j.apmr.2016.11.008
Evidence of compensatory joint kinetics during stair ascent and descent in Parkinson's disease
Conway, Zachary J., Silburn, Peter A., Blackmore, Tim and Cole, Michael H.. (2017) Evidence of compensatory joint kinetics during stair ascent and descent in Parkinson's disease. Gait & Posture. 52, pp. 33 - 39. https://doi.org/10.1016/j.gaitpost.2016.11.017
Neuromuscular impairments are associated with impaired head and trunk stability during gait in Parkinson fallers
Cole, Michael H., Naughton, Geraldine A. and Silburn, Peter A.. (2017) Neuromuscular impairments are associated with impaired head and trunk stability during gait in Parkinson fallers. Neurorehabilitation and Neural Repair. 31(1), pp. 34 - 47. https://doi.org/10.1177/1545968316656057
Influence of physical maturity status on sprinting speed among youth soccer players
McCunn, Robert, Weston, Matthew, Hill, John KA, Johnston, Richard and Gibson, Neil V.. (2017) Influence of physical maturity status on sprinting speed among youth soccer players. Journal of Strength and Conditioning Research. 31(7), pp. 1795 - 1801. https://doi.org/10.1519/JSC.0000000000001654
Individual and combined effects of acute and chronic running loads on injury risk in elite Australian footballers
Murray, Nicholas, Gabbett, Tim, Townshend, Andrew, Hulin, William and McLellan, Christopher. (2017) Individual and combined effects of acute and chronic running loads on injury risk in elite Australian footballers. Scandinavian Journal of Medicine & Science in Sports. 27(9), pp. 990 - 998. https://doi.org/10.1111/sms.12719
Tackle characteristics and outcomes in match-play rugby league: The relationship with tackle ability and physical qualities
Speranza, Michael J. A., Gabbett, Tim J., Greene, David A., Johnston, Townshend, Andrew D. and richard.johnston@acu.edu.au, Rich D. Johnston. (2017) Tackle characteristics and outcomes in match-play rugby league: The relationship with tackle ability and physical qualities. Science and Medicine in Football. 1(3), pp. 265 - 271. https://doi.org/10.1080/24733938.2017.1361041
Movement and physical demands of school and university rugby union match-play in England
Read, Dale, Weaving, Daniel, Phibbs, Padraic, Darrall-Jones, Joshua, Roe, Gregory, Weakley, Jonathon, Hendricks, Sharief, Till, Kevin and Jones, Ben. (2017) Movement and physical demands of school and university rugby union match-play in England. BMJ Open Sport & Exercise Medicine. 2(1), pp. 1 - 7. https://doi.org/10.1136/bmjsem-2016-000147
Neuromuscular impairments are associated with impaired head and trunk stability during gait in Parkinson fallers
Cole, Michael H., Naughton, Geraldine A. and Silburn, Peter A.. (2017) Neuromuscular impairments are associated with impaired head and trunk stability during gait in Parkinson fallers. Neurorehabilitation and Neural Repair. 31(1), pp. 34 - 47. https://doi.org/10.1177/1545968316656057
Relationship between preseason training load and in-season availability in elite australian football players
Murray, Nick B., Gabbett, Tim J. and Townshend, Andrew D.. (2017) Relationship between preseason training load and in-season availability in elite australian football players. International Journal of Sports Physiology and Performance. 12(6), pp. 749 - 755. https://doi.org/10.1123/ijspp.2015-0806
The effect of physical contact on changes in fatigue markers following rugby union field-based training
Roe, Gregory, Darrall-Jones, Joshua, Till, Kevin, Phibbs, Padraic, Read, Dale, Weakley, Jonathon, Rock, Andrew and Jones, Ben. (2017) The effect of physical contact on changes in fatigue markers following rugby union field-based training. European Journal of Sport Science. 17(6), pp. 647 - 655. https://doi.org/10.1080/17461391.2017.1287960
To jump or cycle? Monitoring neuromuscular function in rugby union players
Roe, Gregory, Darrall-Jones, Joshua, Till, Kevin, Phibbs, Padraic J., Read, Dale, Weakley, Jonathon and Jones, Ben. (2017) To jump or cycle? Monitoring neuromuscular function in rugby union players. International Journal of Sports Physiology and Performance. 12(5), pp. 690 - 696. https://doi.org/10.1123/ijspp.2016-0273
The energetic cost of gait retraining: A pilot study of the acute effect
Townshend, Andrew, Smith, Melinda and Creaby, Mark. (2017) The energetic cost of gait retraining: A pilot study of the acute effect. Physical Therapy in Sport. 23, pp. 113 - 117. https://doi.org/10.1016/j.ptsp.2016.08.010
Use of a short-form balance confidence scale to predict future recurrent falls in people with Parkinson Disease
Cole, Michael H., Rippey, Jodi, Naughton, Geraldine A. and Silburn, Peter A.. (2016) Use of a short-form balance confidence scale to predict future recurrent falls in people with Parkinson Disease. Archives of Physical Medicine and Rehabilitation. 97(1), pp. 152 - 156. https://doi.org/10.1016/j.apmr.2015.07.027
A systematic review on perceptual-motor calibration to changes in action capabilities
van Andel, Steven, Cole, Michael H. and Pepping, Gert-Jan. (2016) A systematic review on perceptual-motor calibration to changes in action capabilities. Human Movement Science. 51(1), pp. 59 - 71. https://doi.org/10.1016/j.humov.2016.11.004
Assessing stability in mild and moderate Parkinson's disease: Can clinical measures provide insight?
Hubble, Ryan P., Silburn, Peter A., Naughton, Geraldine A. and Cole, Michael H.. (2016) Assessing stability in mild and moderate Parkinson's disease: Can clinical measures provide insight? Gait & Posture. 49(1), pp. 7 - 13. https://doi.org/10.1016/j.gaitpost.2016.06.002
The biomechanics of the modern golf swing: Implications for lower back injuries
Cole, Michael H. and Grimshaw, Paul N.. (2016) The biomechanics of the modern golf swing: Implications for lower back injuries. Sports Medicine. 46(3), pp. 339 - 351. https://doi.org/10.1007/s40279-015-0429-1
Monitoring workload in throwing-dominant sports: A systematic review
Black, Georgia M., Gabbett, Tim J., Cole, Michael H. and Naughton, Geraldine. (2016) Monitoring workload in throwing-dominant sports: A systematic review. Sports Medicine. 46, pp. 1503 - 1516. https://doi.org/10.1007/s40279-016-0529-6
The effect of body mass on the 30-15 intermittent fitness test in rugby union players
Darrall-Jones, Joshua David, Roe, Gregory A. B., Carney, Shane, Clayton, Ryan, Phibbs, Padraic J., Read, Dale B., Weakley, Jonathon, Till, Kevin and Jones, Ben. (2016) The effect of body mass on the 30-15 intermittent fitness test in rugby union players. International Journal of Sports Physiology and Performance. 11(3), pp. 400 - 403. https://doi.org/10.1123/ijspp.2015-0231
Between-days reliability and sensitivity of common fatigue measures in rugby players
Roe, Gregory A. B., Darrall-Jones, Joshua David, Till, Kevin, Phibbs, Padraic J., Read, Dale B., Weakley, Jonathon and Jones, Ben. (2016) Between-days reliability and sensitivity of common fatigue measures in rugby players. International Journal of Sports Physiology and Performance. 11(5), pp. 581 - 586. https://doi.org/10.1123/ijspp.2015-0413
A systematic review on perceptual-motor calibration to changes in action capabilities
van Andel, Steven, Cole, Michael H. and Pepping, Gert-Jan. (2016) A systematic review on perceptual-motor calibration to changes in action capabilities. Human Movement Science. 51(1), pp. 59 - 71. https://doi.org/10.1016/j.humov.2016.11.004
Use of a short-form balance confidence scale to predict future recurrent falls in people with Parkinson Disease
Cole, Michael H., Rippey, Jodi, Naughton, Geraldine A. and Silburn, Peter A.. (2016) Use of a short-form balance confidence scale to predict future recurrent falls in people with Parkinson Disease. Archives of Physical Medicine and Rehabilitation. 97(1), pp. 152 - 156. https://doi.org/10.1016/j.apmr.2015.07.027
Monitoring workload in throwing-dominant sports: A systematic review
Black, Georgia M., Gabbett, Tim J., Cole, Michael H. and Naughton, Geraldine. (2016) Monitoring workload in throwing-dominant sports: A systematic review. Sports Medicine. 46, pp. 1503 - 1516. https://doi.org/10.1007/s40279-016-0529-6
The biomechanics of the modern golf swing: Implications for lower back injuries
Cole, Michael H. and Grimshaw, Paul N.. (2016) The biomechanics of the modern golf swing: Implications for lower back injuries. Sports Medicine. 46(3), pp. 339 - 351. https://doi.org/10.1007/s40279-015-0429-1
Physical qualities and activity profiles of sub-elite and recreational Australian football players
Stein, Joshua, Gabbett, Tim, Townshend, Andrew and Dawson, Brian. (2015) Physical qualities and activity profiles of sub-elite and recreational Australian football players. Journal of Science and Medicine in Sport. 18, pp. 742 - 747. https://doi.org/10.1016/j.jsams.2014.10.008
The use of wearable microsensors to quantify sport-specific movements
Chambers, Ryan, Gabbett, Tim J., Cole, Michael H. and Beard, Adam. (2015) The use of wearable microsensors to quantify sport-specific movements. Sports Medicine. 45(7), pp. 1065 - 1081. https://doi.org/10.1007/s40279-015-0332-9
Wearable sensor use for assessing standing balance and walking stability in people with Parkinson’s Disease: A systematic review
Hubble, Ryan, Naughton, Geraldine, Silburn, Peter and Cole, Michael. (2015) Wearable sensor use for assessing standing balance and walking stability in people with Parkinson’s Disease: A systematic review. PLoS ONE. 10(4), pp. 1 - 22. https://doi.org/10.1371/journal.pone.0123705
The influence of physical fitness and playing standard on pacing strategies during a team-sport tournament
Johnston, Rich, Gabbett, Tim and Jenkins, David. (2015) The influence of physical fitness and playing standard on pacing strategies during a team-sport tournament. International Journal of Sports Physiology and Performance. 10(8), pp. 1001 - 1008. https://doi.org/10.1123/ijspp.2015-0005
Fatigue and pacing in rugby league players
Johnston, Richard. (2015) Fatigue and pacing in rugby league players [Thesis]. https://doi.org/10.4226/66/5a9cbe35b0b9e
Influence of playing standard and physical fitness on activity profiles and post-match fatigue during intensified junior rugby league competition
Johnston, Rich, Gabbett, Tim and Jenkins, David. (2015) Influence of playing standard and physical fitness on activity profiles and post-match fatigue during intensified junior rugby league competition. Sports Medicine - Open. 1(18), pp. 1 - 10. https://doi.org/10.1186/s40798-015-0015-y
The use of wearable microsensors to quantify sport-specific movements
Chambers, Ryan, Gabbett, Tim J., Cole, Michael H. and Beard, Adam. (2015) The use of wearable microsensors to quantify sport-specific movements. Sports Medicine. 45(7), pp. 1065 - 1081. https://doi.org/10.1007/s40279-015-0332-9
Relationship between a standardized tackling proficiency test and match-play tackle performance in semiprofessional Rugby League players
Speranza, Michael, Gabbett, Tim, Johnston, Rich and Sheppard, Jeremy. (2015) Relationship between a standardized tackling proficiency test and match-play tackle performance in semiprofessional Rugby League players. International Journal of Sports Physiology and Performance. 10(6), pp. 754 - 760. https://doi.org/10.1123/ijspp.2015-0044
Muscular strength and power correlates of tackling ability in semiprofessional Rugby League players
Speranza, Michael, Gabbett, Tim, Johnston, Richard and Sheppard, Jeremy. (2015) Muscular strength and power correlates of tackling ability in semiprofessional Rugby League players. Journal of Strength and Conditioning Research. 29(8), pp. 2071 - 2078. https://doi.org/10.1519/JSC.0000000000000897
Trunk muscle exercises as a means of improving postural stability in people with Parkinson's disease : A protocol for a randomised controlled trial
Hubble, Ryan P., Naughton, Geraldine A., Silburn, Peter and Cole, Michael H.. (2014) Trunk muscle exercises as a means of improving postural stability in people with Parkinson's disease : A protocol for a randomised controlled trial. BMJ Open. 4(12), pp. 1 - 9. https://doi.org/10.1136/bmjopen-2014-006095
Concurrent validity of accelerations measured using tri-axial inertial measurement unit while walking on firm, compliant and uneven surfaces
Cole, Michael H., van den Hoorn, Wolbert, Kavanagh, Justin K., Morrison, Steven, Hodges, Paul W., Smeathers, James E. and Kerr, Graham K.. (2014) Concurrent validity of accelerations measured using tri-axial inertial measurement unit while walking on firm, compliant and uneven surfaces. PLoS ONE. 9(5), pp. 1 - 12. https://doi.org/10.1371/journal.pone.0098395
Applied sport science of Rugby League
Johnston, Rich, Gabbett, Tim J. and Jenkins, David. (2014) Applied sport science of Rugby League. Sports Medicine: reviews of applied medicine and science in sport and exercise. 44(8), pp. 1087 - 1100. https://doi.org/10.1007/s40279-014-0190-x
Executive function and postural instability in people with Parkinson's disease
Xu, Dong, Cole, Michael H., Mengersen, Kerrie, Silburn, Peter A., Qiu, Feng, Graepel, Cara and Kerr, Graham. (2014) Executive function and postural instability in people with Parkinson's disease. Parkinson's Disease. 2014(1), pp. 1 - 8. https://doi.org/10.1155/2014/684758
The crunch factor's role in golf-related low back pain
Cole, Michael H.. (2014) The crunch factor's role in golf-related low back pain. Spine Journal. 14(5), pp. 799 - 807. https://doi.org/10.1016/j.spinee.2013.09.019
Influence of Physical Contact on Pacing Strategies During Game-Based Activities
Johnston, Rich, Gabbett, Tim, Seibold, Anthony and Jenkins, David. (2014) Influence of Physical Contact on Pacing Strategies During Game-Based Activities. International Journal of Sports Physiology and Performance. 9(5), pp. 811 - 816. https://doi.org/10.1123/ijspp.2013-0424
Professionalism, golf coaching and a Master of Science degree: A commentary
Cole, Michael H.. (2014) Professionalism, golf coaching and a Master of Science degree: A commentary. International Journal of Sports Science and Coaching. 9(4), pp. 861 - 864. https://doi.org/10.1260/1747-9541.9.4.717
The crunch factor's role in golf-related low back pain
Cole, Michael H. and Grimshaw, Paul N.. (2014) The crunch factor's role in golf-related low back pain. Spine Journal. 14(5), pp. 799 - 807. https://doi.org/10.1016/j.spinee.2013.09.019
Professionalism, golf coaching and a Master of Science degree: A commentary
Cole, Michael H.. (2014) Professionalism, golf coaching and a Master of Science degree: A commentary. International Journal of Sports Science and Coaching. 9(4), pp. 861 - 864. https://doi.org/10.1260/1747-9541.9.4.717
Effects of textured insoles on balance in people with Parkinson's Disease
Qiu, Feng, Cole, Michael H., Davids, Keith W., Hennig, Ewald M., Silburn, Peter A., Netscher, Heather and Kerr, Graham K.. (2013) Effects of textured insoles on balance in people with Parkinson's Disease. PLoS ONE. 8(12), pp. 1 - 8. https://doi.org/10.1371/journal.pone.0083309
Physiological responses to an intensified period of rugby league competition
Johnston, Richard, Gibson, Neil, Twist, Craig, Gabbett, Timothy, MacNay, Sophie and MacFarlane, Niall. (2013) Physiological responses to an intensified period of rugby league competition. Journal of Strength and Conditioning Research. https://doi.org/10.1519/JSC.0b013e31825bb469
Relationship between measures of aerobic fitness, speed and repeated sprint ability in full and part time youth soccer players
Gibson, Neil V., Currie, J., Johnston, Richard and Hill, J.. (2013) Relationship between measures of aerobic fitness, speed and repeated sprint ability in full and part time youth soccer players. Journal of Sports Medicine and Physical Fitness. 53(1), pp. 9 - 16.
Influence of an intensified competition on fatigue and match performance in junior rugby league players
Johnston, Richard, Gabbett, Timothy and Jenkins, David. (2013) Influence of an intensified competition on fatigue and match performance in junior rugby league players. Journal of Science and Medicine in Sport. https://doi.org/10.1016/j.jsams.2012.10.009
Cognitive tasks influence balance performance in people with Parkinson's disease
Xu, Dong, Muthalib, Mark, Pegoraro, Roger, Mengersen, Kerrie, Cole, Michael, Silburn, Peter and Kerr, Graham. (2013) Cognitive tasks influence balance performance in people with Parkinson's disease. 17th International Congress of Parkinson's Disease and Movement Disorders. United States of America: Movement Disorders Society. pp. S200 - S200
A secondary motor task exaggerates gait deficits in Parkinson's fallers
Kerr, Graham K., Cole, Michael, Wood, Joanne M. and Silburn, Peter A.. (2012) A secondary motor task exaggerates gait deficits in Parkinson's fallers. Congress of the International Society of Electrophysiology & Kinesiology. International Society of Electrophysiology & Kinesiology.
How well do clinical tests predict future falls in older people?
Kerr, Graham K., Wood, Joanne M., Lacherez, Philippe F. and Cole, Michael H.. (2012) How well do clinical tests predict future falls in older people?
Cognitive function and postural instability in people with Parkinson's disease
Xu, Dong, Cole, Michael, Mengersen, Kerrie, Silburn, Peter and Kerr, Graham. (2012) Cognitive function and postural instability in people with Parkinson's disease.
Hamstring asymmetry: The key to recurring injury
Hill, Cameron and Cole, Michael. (2012) Hamstring asymmetry: The key to recurring injury.
A spatiotemporal analysis of gait freezing and the impact of pedunculopontine nucleus stimulation
Thevathasan, Wesley, Cole, Michael H., Graepel, Cara L., Hyam, Jonathan A., Jenkinson, Ned, Brittain, John-Stuart, Coyne, Terry J., Silburn, Peter A., Aziz, Tipu Z., Kerr, Graham K. and Brown, Peter. (2012) A spatiotemporal analysis of gait freezing and the impact of pedunculopontine nucleus stimulation. Brain. 135, pp. 1446 - 1454. https://doi.org/10.1093/brain/aws039
Performance of a secondary motor task reveals altered gait patterns in future Parkinson's fallers
Kerr, Graham K., Cole, Michael H., Wood, Joanne M. and Silburn, Peter A.. (2012) Performance of a secondary motor task reveals altered gait patterns in future Parkinson's fallers.
Falls in Parkinson's disease: Evidence for altered stepping strategies on compliant surfaces
Cole, Michael H., Silburn, Peter A., Wood, Joanne M. and Kerr, Graham K.. (2011) Falls in Parkinson's disease: Evidence for altered stepping strategies on compliant surfaces. Parkinsonism and Related Disorders. 17(8), pp. 610 - 616. https://doi.org/10.1016/j.parkreldis.2011.05.019
Pedunculopontine nucleus deep brain stimulation produces sustained improvement in primary progressive freezing of gait
Wilcox, Robert A., Cole, Michael H., Wong, David, Coyne, Terry, Silburn, Peter and Kerr, Graham. (2011) Pedunculopontine nucleus deep brain stimulation produces sustained improvement in primary progressive freezing of gait. Journal of Neurology, Neurosurgery and Psychiatry. 82(11), pp. 1256 - 1259. https://doi.org/10.1136/jnnp.2010.213462
Falls in Parkinson's disease: Evidence for altered stepping strategies on compliant surfaces
Cole, Michael H., Silburn, Peter A., Wood, Joanne M. and Kerr, Graham K.. (2011) Falls in Parkinson's disease: Evidence for altered stepping strategies on compliant surfaces. Parkinsonism and Related Disorders. 17(8), pp. 610 - 616. https://doi.org/10.1016/j.parkreldis.2011.05.019
Risk of falls, injurious falls, and other injuries resulting from visual impairment among older adults with age-related macular degeneration
Wood, Joanne M., Lacherez, Philippe, Black, Alex A., Cole, Michael H., Boon, Mei Ying and Kerr, Graham K.. (2011) Risk of falls, injurious falls, and other injuries resulting from visual impairment among older adults with age-related macular degeneration. Investigative Ophthalmology and Visual Science. 52(8), pp. 5088 - 5092. https://doi.org/10.1167/iovs.10-6644
Pedunculopontine nucleus deep brain stimulation produces sustained improvement in primary progressive freezing of gait
Wilcox, Robert A., Cole, Michael H., Wong, David, Coyne, Terry, Silburn, Peter and Kerr, Graham. (2011) Pedunculopontine nucleus deep brain stimulation produces sustained improvement in primary progressive freezing of gait. Journal of Neurology, Neurosurgery and Psychiatry. 82(11), pp. 1256 - 1259. https://doi.org/10.1136/jnnp.2010.213462
Falls in Parkinson's disease: Kinematic evidence for impaired head and trunk control
Cole, Michael H., Silburn, Peter A., Wood, Joanne M., Worringham, Charles J. and Kerr, Graham K.. (2010) Falls in Parkinson's disease: Kinematic evidence for impaired head and trunk control. Movement Disorders. 25(14), pp. 2369 - 2378. https://doi.org/10.1002/mds.23292
Falls in Parkinson's disease: Kinematic evidence for impaired head and trunk control
Cole, Michael H., Silburn, Peter A., Wood, Joanne M., Worringham, Charles J. and Kerr, Graham K.. (2010) Falls in Parkinson's disease: Kinematic evidence for impaired head and trunk control. Movement Disorders. 25(14), pp. 2369 - 2378. https://doi.org/10.1002/mds.23292
Spontaneous pacing during overground hill running
Townshend, Andrew Douglas, Worringham, Charles and Stewart, Ian. (2010) Spontaneous pacing during overground hill running. Medicine and Science in Sports and Exercise. 42(1), pp. 160 - 169. https://doi.org/10.1249/MSS.0b013e3181af21e2
Postural stability and gait among older adults with age-related maculopathy
Wood, Joanne M., Lacherez, Philippe F., Black, Alex A., Cole, Michael H., Boon, Mei Ying and Kerr, Graham K.. (2009) Postural stability and gait among older adults with age-related maculopathy. Investigative Ophthalmology and Visual Science. 50(1), pp. 482 - 487. https://doi.org/10.1167/iovs.08-1942
The x-factor and its relationship to golfing performance
Cole, Michael H. and Grimshaw, Paul N.. (2009) The x-factor and its relationship to golfing performance. Journal of Quantitative Analysis in Sports. 5(1), pp. 1 - 19. https://doi.org/10.2202/1559-0410.1134
Assessment of speed and position during human locomotion using nondifferential GPS
Townshend, Andrew, Worringham, Charles and Stewart, Ian. (2008) Assessment of speed and position during human locomotion using nondifferential GPS. Medicine and Science in Sports and Exercise. 40(1), pp. 124 - 132. https://doi.org/10.1249/mss.0b013e3181590bc2