Muscle activity and activation in previously strain-injured lower limbs : A systematic review

Journal article

Presland, J. D., Timmins, R. G., Maniar, N., Tofari, P. J., Kidgell, D. J., Shield, A. J., Dickson, J. and Opar, D.. (2021). Muscle activity and activation in previously strain-injured lower limbs : A systematic review. Sports Medicine. 51(11), pp. 2311-2327. https://doi.org/10.1007/s40279-021-01487-w
AuthorsPresland, J. D., Timmins, R. G., Maniar, N., Tofari, P. J., Kidgell, D. J., Shield, A. J., Dickson, J. and Opar, D.
Abstract

Background
Lower limb muscle strain injury is highly prevalent in running-based sports and is considered a risk factor for recurrent injury. It is possible that differences in muscle activity and activation in previously strain-injured limbs may contribute to the elevated risk of reinjury.

Objectives
To systematically review available literature investigating whether muscle activity and/or activation is different in previously strain-injured muscles compared to contralateral uninjured muscles or uninjured controls.

Methods
A systematic review of literature in SPORTDiscus, MEDLINE Complete, CINAHL and Web of Science was conducted. Full-text English articles which compared indicators of neuromuscular function between injured and uninjured contralateral limbs or control groups in those with a history of muscle strain injury were included.

Results
Twelve studies were included in the review after eligibility criteria were applied. A best evidence synthesis revealed moderate to limited evidence suggesting differences in surface electromyography (sEMG) amplitude, integrated sEMG amplitude, inter-muscle sEMG ratios and voluntary activation in injured limbs, most often during eccentric contractions. Studies utilising sprinting assessments demonstrated conflicting evidence when comparing late swing phase biceps femoris sEMG amplitude between limbs with a history of hamstring strain injury and uninjured contralateral limbs.

Conclusions
Differences in muscle activity and activation were observed between injured and uninjured limbs across a variety of strength assessments. The evidence supporting these differences was most often moderate or limited and was generally observed during eccentric contractions. Mostly conflicting or limited evidence was found to suggest that participants with previous hamstring strain injury demonstrate no differences in muscle activity during running tasks when compared with their uninjured counterparts or contralateral limbs.

Trial Registry
PROSPERO (ID, CRD42019135681).

Year2021
JournalSports Medicine
Journal citation51 (11), pp. 2311-2327
PublisherAdis International Ltd.
ISSN0112-1642
Digital Object Identifier (DOI)https://doi.org/10.1007/s40279-021-01487-w
PubMed ID34309803
Scopus EID2-s2.0-85111288635
Research or scholarlyResearch
Page range2311-2327
Publisher's version
License
All rights reserved
File Access Level
Controlled
Output statusPublished
Publication dates
Online26 Jul 2021
Publication process dates
Accepted16 May 2021
Deposited23 Nov 2021
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McGrath, Timothy M., Hulin, Billy T., Pickworth, Nathan, Clarke, Alex and Timmins, Ryan G.. (2020). Determinants of hamstring fascicle length in professional rugby league athletes. Journal of Science and Medicine in Sport. 23(5), pp. 524-528. https://doi.org/10.1016/j.jsams.2019.12.006
Factors that impact self-reported wellness scores in elite Australian Footballers
Ruddy, Joshua D., Cormack, Stuart, Timmins, Ryan G., Sakadjian, Alex, Pietsch, Samuel, Carey, David L., Williams, Morgan D. and Opar, David A.. (2020). Factors that impact self-reported wellness scores in elite Australian Footballers. Medicine & Science in Sports & Exercise. 52(6), pp. 1427-1435. https://doi.org/10.1249/MSS.0000000000002244
Measuring the response to simulated fixture congestion in soccer
Tofari, Paul J., Kemp, Justin G. and Cormack, Stuart J.. (2020). Measuring the response to simulated fixture congestion in soccer. Science and Medicine in Football. 4(4), pp. 293-304. https://doi.org/10.1080/24733938.2020.1746824
Differences in lower limb strength and structure after 12 weeks of resistance, endurance, and concurrent training
Timmins, Ryan G., Shamim, Baubak, Tofari, Paul J., Hickey, Jack T. and Camera, Donny M.. (2020). Differences in lower limb strength and structure after 12 weeks of resistance, endurance, and concurrent training. International Journal of Sports Physiology and Performance. 15(9), pp. 1223-1230. https://doi.org/10.1123/IJSPP.2019-0788
Hamstring myoelectrical activity during three different kettlebell swing exercises
Del Monte, Michael J., Opar, David, Timmins, Ryan G., Ross, James A., Keogh, Justin W. L. and Lorenzen, Christian. (2020). Hamstring myoelectrical activity during three different kettlebell swing exercises. Journal of Strength and Conditioning Research. 34(7), pp. 1953-1958. https://doi.org/10.1519/JSC.0000000000002254
Systematically searching and reviewing the literature
Maniar, Nirav, Duncan, Kathryn and Opar, David. (2019). Systematically searching and reviewing the literature. In In Bird, Stephen R. (Ed.). Research methods in physical activity and health pp. 28-44 Routledge. https://doi.org/10.4324/9781315158501-5
Modeling the risk of team sport injuries : A narrative review of different statistical approaches
Ruddy, Joshua D., Cormack, Stuart J., Whiteley, Rod, Williams, Morgan D., Timmins, Ryan G. and Opar, David A.. (2019). Modeling the risk of team sport injuries : A narrative review of different statistical approaches. Frontiers in Physiology. 10, p. Article 829.
Session availability as a result of prior injury impacts the risk of subsequent non-contact lower limb injury in elite male australian footballers
Ruddy, Joshua D., Pietsch, Samuel, Maniar, Nirav, Cormack, Stuart J., Timmins, Ryan G., Williams, Morgan D., Carey, David L. and Opar, David A.. (2019). Session availability as a result of prior injury impacts the risk of subsequent non-contact lower limb injury in elite male australian footballers. Frontiers in Physiology. 10, p. 737. https://doi.org/10.3389/fphys.2019.00737
A novel device to assess hip strength : Concurrent validity and normative values in male athletes
O'Brien, Michael, Bourne, Matthew, Heerey, Joshua, Timmins, Ryan G. and Pizzari, Tania. (2019). A novel device to assess hip strength : Concurrent validity and normative values in male athletes. Physical Therapy in Sport. 35, pp. 63-68. https://doi.org/10.1016/j.ptsp.2018.11.006
Effect of concentric and eccentric hamstring training on sprint recovery, strength and muscle architecture in inexperienced athletes
Duhig, Steven J., Bourne, Matthew N., Buhmann, Robert L., Williams, Morgan, Minett, Geoffrey M., Roberts, Llion A., Timmins, Ryan Gregory, Sims, Casey and Shield, Anthony J.. (2019). Effect of concentric and eccentric hamstring training on sprint recovery, strength and muscle architecture in inexperienced athletes. Journal of Science and Medicine in Sport. 22(7), pp. 769 - 774. https://doi.org/10.1016/j.jsams.2019.01.010
Hamstring muscle activation and morphology are significantly altered 1-6 years after anterior cruciate ligament reconstruction with semitendinosus graft
Messer, Daniel J., Shield, Anthony J., Williams, Morgan D., Timmins, Ryan Gregory and Bourne, Matthew N.. (2019). Hamstring muscle activation and morphology are significantly altered 1-6 years after anterior cruciate ligament reconstruction with semitendinosus graft. Knee Surgery, Sports Traumatology, Arthroscopy. 27. https://doi.org/10.1007/s00167-019-05374-w
Razor hamstring curl and Nordic hamstring exercise architectural adaptations : Impact of exercise selection and intensity
Pollard, Christopher W., Opar, David A., Williams, Morgan D., Bourne, Matthew N. and Timmins, Ryan Gregory. (2019). Razor hamstring curl and Nordic hamstring exercise architectural adaptations : Impact of exercise selection and intensity. Scandinavian Journal of Medicine & Science in Sports. 29(5), pp. 706-715. https://doi.org/10.1111/sms.13381
Lower-limb muscle function during sidestep cutting
Maniar, Nirav, Schache, Anthony G., Cole, Michael H. and Opar, David. (2019). Lower-limb muscle function during sidestep cutting. Journal of Biomechanics. 82, pp. 186 - 192. https://doi.org/10.1016/j.jbiomech.2018.10.021
Effect of acute augmented feedback on between limb asymmetries and eccentric knee flexor strength during the Nordic hamstring exercise
Wade J. Chalker, Anthony J. Shield, David Opar, Evelyne N. Rathbone and Justin Keogh. (2018). Effect of acute augmented feedback on between limb asymmetries and eccentric knee flexor strength during the Nordic hamstring exercise. PeerJ. (e4972). https://doi.org/10.7717/peerj.4972
Non-knee-spanning muscles contribute to tibiofemoral shear as well as valgus and rotational joint reaction moments during unanticipated sidestep cutting
Maniar, Nirav, Schache, Anthony, Sritharan, Prasanna and Opar, David. (2018). Non-knee-spanning muscles contribute to tibiofemoral shear as well as valgus and rotational joint reaction moments during unanticipated sidestep cutting. Scientific Reports. 8(1), pp. 1 - 10. https://doi.org/10.1038/s41598-017-19098-9
An evidence-based framework for strengthening exercises to prevent hamstring injury
Bourne, Matthew N., Timmins, Ryan Gregory, Opar, David, Pizzari, Tania, Ruddy, Joshua D., Sims, Casey, Williams, Morgan D. and Shield, Anthony J.. (2018). An evidence-based framework for strengthening exercises to prevent hamstring injury. Sports Medicine. 48(2), pp. 251 - 267. https://doi.org/10.1007/s40279-017-0796-x
The effect of Nordic hamstring exercise training volume on biceps femoris long head architectural adaptation
Presland, J. D., Timmins, R. G., Bourne, M. N., Williams, M. D. and Opar, D. A.. (2018). The effect of Nordic hamstring exercise training volume on biceps femoris long head architectural adaptation. Scandinavian Journal of Medicine & Science in Sports. 28(7), pp. 1775-1783. https://doi.org/10.1111/sms.13085
Self-paced team-sport match simulation results in reductions in voluntary activation and modifications to biological, perceptual, and performance measures at halftime and for up to 96 hours postmatch
Tofari, Paul J., Kemp, Justin G. and Cormack, Stuart J.. (2018). Self-paced team-sport match simulation results in reductions in voluntary activation and modifications to biological, perceptual, and performance measures at halftime and for up to 96 hours postmatch. Journal of Strength and Conditioning Research. 32(12), pp. 3552 - 3563. https://doi.org/10.1519/JSC.0000000000001875
Infographic. Impact of the Nordic hamstring and hip extension exercises on hamstring architecture and morphology: Implications for injury prevention
Bourne, Matthew N., Pope, David, Duhig, Steven J., Timmins, Ryan G., Williams, Morgan D., Al Najjar, Aiman, Kerr, Graham K. and Shield, Anthony J.. (2018). Infographic. Impact of the Nordic hamstring and hip extension exercises on hamstring architecture and morphology: Implications for injury prevention. British Journal of Sports Medicine. 52(23), pp. 1490 - 1491. https://doi.org/10.1136/bjsports-2017-098730
A novel apparatus to measure knee flexor strength during various hamstring exercises: A reliability and retrospective injury study
Hickey, Jack T., Hickey, Peter F., Maniar, Nirav, Timmins, Ryan G., Williams, Morgan D., Pitcher, Christian A. and Opar, David A.. (2018). A novel apparatus to measure knee flexor strength during various hamstring exercises: A reliability and retrospective injury study. Journal of Orthopaedic and Sports Physical Therapy. 48(2), pp. 72 - 80. https://doi.org/10.2519/jospt.2018.7634
Adaptations to concurrent training in combination with high protein availability: A comparative trial in healthy, recreationally active men
Shamim, Baubak, Devlin, Brooke L., Timmins, Ryan G., Tofari, Paul, Dow, Connor Lee, Coffey, Vernon G., Hawley, John A. and Camera, Donny M.. (2018). Adaptations to concurrent training in combination with high protein availability: A comparative trial in healthy, recreationally active men. Sports Medicine. 48(12), pp. 2869 - 2883. https://doi.org/10.1007/s40279-018-0999-9
Non-knee-spanning muscles contribute to tibiofemoral shear as well as valgus and rotational joint reaction moments during unanticipated sidestep cutting
Maniar, Nirav, Schache, Anthony G., Sritharan, Prasanna and Opar, David. (2018). Non-knee-spanning muscles contribute to tibiofemoral shear as well as valgus and rotational joint reaction moments during unanticipated sidestep cutting. Scientific Reports. 8(2501), pp. 1 - 10. https://doi.org/10.1038/s41598-017-19098-9
Impact of exercise selection on hamstring muscle activation
Bourne, Matthew N., Williams, Morgan, Opar, David, Najjar, Aiman Al, Kerr, Graham K. and Shield, Anthony J.. (2017). Impact of exercise selection on hamstring muscle activation. British Journal of Sports Medicine. 51, pp. 1021 - 1028. https://doi.org/10.1136/bjsports-2015-095739
Muscle force contributions to knee joint loading
Maniar, Nirav. (2017). Muscle force contributions to knee joint loading [Thesis]. https://doi.org/10.26199/5cb7ada848286
Impact of the Nordic hamstring and hip extension exercises on hamstring architecture and morphology: Implications for injury prevention
Bourne, Matthew N., Duhig, Steven J., Timmins, Ryan, Williams, Morgan, Opar, David, Najjar, Aiman Al, Kerr, Graham K. and Shield, Anthony J.. (2017). Impact of the Nordic hamstring and hip extension exercises on hamstring architecture and morphology: Implications for injury prevention. British Journal of Sports Medicine. 51(5), pp. 469 - 477. https://doi.org/10.1136/bjsports-2016-096130
Biceps femoris architecture : The association with injury and response to training
Timmins, Ryan. (2017). Biceps femoris architecture : The association with injury and response to training. British Journal of Sports Medicine. 51(6), pp. 547-548. https://doi.org/10.1136/bjsports-2016-097044
There is strength in numbers for muscle injuries it is time to establish an international collaborative registry
Van Dyke, Nicol, Van der Made, Anne D., Timmins, Ryan, Opar, David and Tol, Johannes L.. (2017). There is strength in numbers for muscle injuries it is time to establish an international collaborative registry. British Journal of Sports Medicine. https://doi.org/10.1136/bjsports-2016-097318
Effect of prior injury on changes to biceps femoris architecture across an Australian football league season
Timmins, Ryan, Bourne, Matthew N., Hickey, Jack, Maniar, Nirav, Tofari, Paul, Williams, Morgan and Opar, David. (2017). Effect of prior injury on changes to biceps femoris architecture across an Australian football league season. Medicine and Science in Sports and Exercise. 49(10), pp. 2102 - 2109. https://doi.org/10.1249/MSS.0000000000001333
Comparison of ergometer- and track-based testing in junior track-sprint cyclists. Implications for talent identification and development
Tofari, Paul, Cormack, Stuart, Ebert, Tammie R., Gardner, A. S. and Kemp, Justin. (2017). Comparison of ergometer- and track-based testing in junior track-sprint cyclists. Implications for talent identification and development. Journal of Sports Sciences. https://doi.org/10.1080/02640414.2016.1243795
Criteria for progressing rehabilitation and determining return to play clearance following hamstring strain injury: A systematic review
Hickey, Jack, Timmins, Ryan G., Maniar, Nirav, Williams, Morgan and Opar, David. (2017). Criteria for progressing rehabilitation and determining return to play clearance following hamstring strain injury: A systematic review. Sports Medicine. 47(7). https://doi.org/10.1007/s40279-016-0667-x
Non-motorized treadmill running is associated with higher cardiometabolic demands compared with overground and motorized treadmill running
Edwards, Robert B., Tofari, Paul J., Cormack, Stuart J. and Whyte, Douglas G.. (2017). Non-motorized treadmill running is associated with higher cardiometabolic demands compared with overground and motorized treadmill running. Frontiers in Physiology. 8(914), pp. 1 - 11. https://doi.org/10.3389/fphys.2017.00914
Predictive modeling of hamstring strain injuries in elite Australian footballers
Ruddy, Joshua, Shield, Anthony J., Maniar, Nirav, Williams, Morgan D., Duhig, Steven J., Timmins, Ryan, Hickey, Jack, Bourne, Matthew N. and Opar, David. (2017). Predictive modeling of hamstring strain injuries in elite Australian footballers. Medicine and Science in Sports and Exercise. 50(5), pp. 1 - 30. https://doi.org/10.1249/MSS.0000000000001527
Running exposure is associated with the risk of hamstring strain injury in elite Australian footballers
Ruddy, Joshua D., Pollard, Christopher, Timmins, Ryan, Williams, Morgan, Shield, Anthony and Opar, David. (2017). Running exposure is associated with the risk of hamstring strain injury in elite Australian footballers. British Journal of Sports Medicine. https://doi.org/10.1136/bjsports-2016-096777
Drop punt kicking induces eccentric knee flexor weakness associated with reductions in hamstring electromyographic activity
Duhig, Steven J., Williams, Morgan, Minett, Geoffrey M., Opar, David and Shield, Anthony J.. (2017). Drop punt kicking induces eccentric knee flexor weakness associated with reductions in hamstring electromyographic activity. Journal of Science and Medicine in Sport. 20(6), pp. 595 - 599. https://doi.org/10.1016/j.jsams.2016.09.006
Muscle activation patterns in the Nordic hamstring exercise: Impact of prior strain injury
Bourne, Matthew N., Opar, David, Williams, Morgan, Najjar, Aiman Al and Shield, Anthony J.. (2016). Muscle activation patterns in the Nordic hamstring exercise: Impact of prior strain injury. Scandinavian Journal of Medicine & Science in Sports. 26(6). https://doi.org/10.1111/sms.12494
Biceps femoris architecture and strength in athletes with a prior ACL reconstruction
Timmins, Ryan G., Bourne, Matthew N., Shield, Anthony J., Williams, Morgan, Lorenzen, Christian and Opar, David A.. (2016). Biceps femoris architecture and strength in athletes with a prior ACL reconstruction. Medicine and Science in Sports and Exercise. 48(3), pp. 337-345. https://doi.org/10.1249/MSS.0000000000000783
Hamstring strength and flexibility after hamstring strain injury: A systematic review and meta-analysis
Maniar, Nirav, Shielf, Anthony J., Williams, Morgan D., Timmins, Ryan G. and Opar, David A.. (2016). Hamstring strength and flexibility after hamstring strain injury: A systematic review and meta-analysis. British Journal of Sports Medicine. 50(15), pp. 909-920. https://doi.org/10.1136/bjsports-2015-095311
Is there evidence to support the use of the angle of peak torque as a marker of hamstring injury and re-injury risk?
Timmins, Ryan G., Shield, Anthony J., Williams, Morgan D. and Opar, David A.. (2016). Is there evidence to support the use of the angle of peak torque as a marker of hamstring injury and re-injury risk? Sports Medicine. 46(1), pp. 7-13. https://doi.org/10.1007/s40279-015-0378-8
Effect of high-speed running on hamstring strain injury risk
Duhig, Steven, Shield, Anthony, Opar, David, Gabbett, Tim, Ferguson, Cameron and Williams, Morgan. (2016). Effect of high-speed running on hamstring strain injury risk. British Journal of Sports Medicine. 50(24). https://doi.org/10.1136/bjsports-2015-095679
Short biceps femoris fascicles and eccentric knee flexor weakness increase the risk of hamstring injury in elite football (soccer): a prospective cohort study
Timmins, Ryan G., Bourne, Matthew N., Shield, Anthony J., Williams, Morgan, Lorenzen, Christian and Opar, David. (2016). Short biceps femoris fascicles and eccentric knee flexor weakness increase the risk of hamstring injury in elite football (soccer): a prospective cohort study. British Journal of Sports Medicine. 50(24). https://doi.org/10.1136/bjsports-2015-095362
Architectural changes of the biceps femoris long head after concentric or eccentric training
Timmins, Ryan G., Ruddy, Joshua D., Presland, Joel, Maniar, Nirav and Williams, Morgan. (2016). Architectural changes of the biceps femoris long head after concentric or eccentric training. Medicine and Science in Sports and Exercise. 48(3), pp. 499-508. https://doi.org/10.1249/MSS.0000000000000795
Reliability of measures of quadriceps muscle function using magnetic stimulation
Tofari, Paul J., Opar, David, Kemp, Justin Guy, Billaut, Francois and Cormack, Stuart John. (2016). Reliability of measures of quadriceps muscle function using magnetic stimulation. Muscle & Nerve. https://doi.org/10.1002/mus.24926
Architectural adaptations of muscle to training and injury: A narrative review outlining the contributions by fascicle length, pennation angle and muscle thickness
Timmins, Ryan G., Shield, Anthony J., Williams, Morgan D., Lorenzen, Christian and Opar, David. (2016). Architectural adaptations of muscle to training and injury: A narrative review outlining the contributions by fascicle length, pennation angle and muscle thickness. British Journal of Sports Medicine. 50(23). https://doi.org/10.1136/bjsports-2015-094881
Tactical combat movements: inter-individual variation in performance due to the effects of load carriage
Hunt, Andrew P., Tofari, Paul J., Billing, Daniel C. and Silk, Aaron J.. (2016). Tactical combat movements: inter-individual variation in performance due to the effects of load carriage. Ergonomics. 59(9), pp. 1232 - 1241. https://doi.org/10.1080/00140139.2015.1132780
Comparisons of eccentric knee flexor strength and asymmetries across elite, sub-elite and school level cricket players
Chalker, Wade J., Shield, Anthony J., Opar, David and Keogh, Justin W. L.. (2016). Comparisons of eccentric knee flexor strength and asymmetries across elite, sub-elite and school level cricket players. PeerJ. 4, pp. 1 - 10. https://doi.org/10.7717/peerj.1594
What do submarines have in common with diabetes?
Rio, Ebony, Timmins, Ryan Gregory and Opar, David. (2016). What do submarines have in common with diabetes? British Journal of Sports Medicine. 50(16), pp. 955 - 956. https://doi.org/10.1136/bjsports-2016-096646
The juxtaposition of science and medicine in sport. Can we all play together nicely?
Opar, David and Rio, Ebony. (2015). The juxtaposition of science and medicine in sport. Can we all play together nicely? British Journal of Sports Medicine. 49(10), pp. 640 - 641. https://doi.org/10.1136/bjsports-2015-094819
Eccentric knee flexor strength and risk of hamstring injuries in Rugby Union: A prospective study
Bourne, Matthew, Opar, David, Williams, Morgan and Shield, Anthony. (2015). Eccentric knee flexor strength and risk of hamstring injuries in Rugby Union: A prospective study. American Journal of Sports Medicine. 43(11), pp. 2663 - 2670. https://doi.org/10.1177/0363546515599633
Acute injuries in track and field athletes : A 3-year observational study at the penn relays carnival with epidemiology and medical coverage implications
Opar, David, Drezner, Jonathan, Shield, Anthony, Williams, Morgan, Webner, David, Sennett, Brian, Kapur, Rahul, Cohen, Marc, Ulager, James, Cafengiu, Ana and Cronholm, Peter F. (2015). Acute injuries in track and field athletes : A 3-year observational study at the penn relays carnival with epidemiology and medical coverage implications. American Journal of Sports Medicine. 43(4), pp. 816 - 822. https://doi.org/10.1177/0363546514562553
Comparison of anthropometry, upper body strength and lower body power characteristics in different levels of Australian Football players
Bilsborough, Johann, Greenway, Kate, Opar, David, Livingstone, Steuart, Cordy, Justin, Bird, S. and Coutts, Aaron. (2015). Comparison of anthropometry, upper body strength and lower body power characteristics in different levels of Australian Football players. Journal of Strength and Conditioning Research. 29(3), pp. 826 - 834. https://doi.org/10.1519/JSC.0000000000000682
Eccentric hamstring strength and hamstring injury risk in Australian footballers
Opar, David A., Williams, Morgan D., Timmins, Ryan G., Duhig, Steven and Shield, Anthony J.. (2015). Eccentric hamstring strength and hamstring injury risk in Australian footballers. Medicine and Science in Sports and Exercise. 47(4). https://doi.org/10.1249/MSS.0000000000000465
The effect of previous hamstring strain injury on the change in eccentric hamstring strength during preseason training in elite Australian footballers
Opar, David A., Williams, Morgan D., Timmins, Ryan G., Hickey, Jack, Duhig, Steven J. and Shield, Anthony J.. (2015). The effect of previous hamstring strain injury on the change in eccentric hamstring strength during preseason training in elite Australian footballers. American Journal of Sports Medicine. 43(2), pp. 377-384. https://doi.org/10.1177/0363546514556638
Biceps femoris long head architecture: A reliability and retrospective injury study
Timmins, Ryan Gregory, Shield, Anthony, Williams, Morgan, Lorenzen, Christian and Opar, David. (2015). Biceps femoris long head architecture: A reliability and retrospective injury study. Medicine and Science in Sports and Exercise. 47(5), pp. 905 - 913. https://doi.org/10.1249/MSS.0000000000000507
The effect of using different regions of interest on local and mean skin temperature
Maniar, Nirav, Bach, Aaron, Stewart, Ian and Costello, Joseph. (2015). The effect of using different regions of interest on local and mean skin temperature. Journal of Thermal Biology. 49-50, pp. 33 - 38. https://doi.org/10.1016/j.jtherbio.2015.01.008
Effects of Military Load Carriage on Susceptibility to Enemy Fire During Tactical Combat Movements
Billing, Daniel C., Silk, Aaron J., Tofari, Paul J. and Hunt, Andrew P.. (2015). Effects of Military Load Carriage on Susceptibility to Enemy Fire During Tactical Combat Movements. Journal of Strength and Conditioning Research. 29(11S), pp. S134 - S138. https://doi.org/10.1519/JSC.0000000000001036
Biceps femoris long head architecture: The association with hamstring injury and response to training
Timmins, Ryan Gregory. (2015). Biceps femoris long head architecture: The association with hamstring injury and response to training [Thesis]. https://doi.org/10.4226/66/5a9cbd05b0b98
Changes in running performance after four weeks of interval training in Australian Footballers : A single-blind placebo-controlled study
McLean, Blake, Tofari, Paul, Gore, Christopher and Kemp, Justin. (2015). Changes in running performance after four weeks of interval training in Australian Footballers : A single-blind placebo-controlled study. Journal of Strength and Conditioning Research. 29(11), pp. 3206 - 3215. https://doi.org/10.1519/JSC.0000000000000984
The accuracy and precision of DXA for assessing body composition in team sport athletes
Bilsborough, Johann, Greenway, Kate, Opar, David, Livingstone, Steuart, Cordy, Justin and Coutts, Aaron. (2014). The accuracy and precision of DXA for assessing body composition in team sport athletes. Journal of Sports Sciences. 32(19), pp. 1821 - 1828. https://doi.org/10.1080/02640414.2014.926380
Is there a potential relationship between prior hamstring strain injury and increased risk for future anterior cruciate ligament injury?
Opar, David and Serpell, Benjamin. (2014). Is there a potential relationship between prior hamstring strain injury and increased risk for future anterior cruciate ligament injury? Archives of Physical Medicine and Rehabilitation. 95(2). https://doi.org/10.1016/j.apmr.2013.07.028
Reduced biceps femoris myoelectrical activity influences eccentric knee flexor weakness after repeat sprint running
Timmins, R. G., Opar, D. A., Williams, M. D., Schache, A. G., Dear, N. M. and Shield, A. J.. (2014). Reduced biceps femoris myoelectrical activity influences eccentric knee flexor weakness after repeat sprint running. Scandinavian Journal of Medicine & Science in Sports. 24(4), pp. e299-e305. https://doi.org/10.1111/sms.12171
The financial cost of hamstring strain injuries in the Australian Football League
Hickey, Jack, Shield, Anthony J., Williams, Morgan D. and Opar, David A. (2014). The financial cost of hamstring strain injuries in the Australian Football League. British Journal of Sports Medicine. 48(8), pp. 729-730. https://doi.org/10.1136/bjsports-2013-092884
Acute hamstring strain injury in track-and-field athletes: A 3-year observational study at the Penn Relay Carnival
Opar, David, Drezner, Jonathan, Shield, Anthony, Williams, Morgan, Webner, David, Sennett, Brian, Kapur, Rahul, Cohen, M., Ulager, James and Cafengiu, Ana. (2014). Acute hamstring strain injury in track-and-field athletes: A 3-year observational study at the Penn Relay Carnival. Scandinavian Journal of Medicine & Science in Sports. 24(4). https://doi.org/10.1111/sms.12159
A novel device using the Nordic hamstring exercise to assess eccentric knee flexor strength: A reliability and retrospective injury study
Opar, David, Piatowski, Timothy, Williams, Morgan and Shield, Anthony J.. (2013). A novel device using the Nordic hamstring exercise to assess eccentric knee flexor strength: A reliability and retrospective injury study. Journal of Orthopaedic and Sports Physical Therapy. 43(9), pp. 636 - 640. https://doi.org/10.2519/jospt.2013.4837
A quantification of the physiological demands of the army emergency responder in the Australian Army
Tofari, Paul J., Laing Treloar, Alison K. and Silk, Aaron J.. (2013). A quantification of the physiological demands of the army emergency responder in the Australian Army. Military Medicine. 178(5), pp. 487 - 494. https://doi.org/10.7205/MILMED-D-12-00423
Rate of torque and electromyographic development during anticipated eccentric contraction is lower in previously strained hamstrings
Opar, David A., Williams, Morgan D., Timmins, Ryan G. and Dear, Nuala M. (2013). Rate of torque and electromyographic development during anticipated eccentric contraction is lower in previously strained hamstrings. The American Journal of Sports Medicine. 41(1), pp. 116-125. https://doi.org/10.1177/0363546512462809
The role of neuromuscular inhibition in hamstring strain injury recurrence
Fyfe, Jackson, Opar, David, Williams, Morgan and Shield, Anthony. (2013). The role of neuromuscular inhibition in hamstring strain injury recurrence. Journal of Electromyography and Kinesiology. 23(3), pp. 523-530. https://doi.org/10.1016/j.jelekin.2012.12.006
Knee flexor strength and bicep femoris electromyographical activity is lower in previously strained hamstrings
Opar, David A., Williams, Morgan D., Timmins, Ryan G., Dear, Nuala M. and Shield, Anthony J. (2013). Knee flexor strength and bicep femoris electromyographical activity is lower in previously strained hamstrings. Journal of Electromyography and Kinesiology. 23(3), pp. 696-703. https://doi.org/10.1016/j.jelekin.2012.11.004
Hamstring strain injuries : Factors that lead to injury and re-injury
Opar, David A., Williams, Morgan D. and Shield, Anthony J. (2012). Hamstring strain injuries : Factors that lead to injury and re-injury. Sports Medicine. 42(3), pp. 209-226. https://doi.org/10.2165/11594800-000000000-00000
A self-paced intermittent protocol on a non-motorised treadmill: A reliable alternative to assessing team-sport running performance
Tofari, Paul J., McLean, Blake D., Kemp, Justin and Cormack, Stuart. (2011). A self-paced intermittent protocol on a non-motorised treadmill: A reliable alternative to assessing team-sport running performance. Journal of Sports Science and Medicine. 14(1), pp. 62 - 68.