David Opar


NameDavid Opar
Job titleSenior Lecturer (Exercise Science)
Research instituteSchool of Behavioural and Health Sciences
Faculty of Health Sciences

Research outputs

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

Journal article

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

Journal article

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

Journal article

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

Journal article

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

Journal article

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). https://doi.org/10.1136/bjsports-2016-096130

Journal article

Hamstring myoelectrical activity during three different kettlebell swing exercises
Del Monte, Michael J., Opar, David, Timmins, Ryan Gregory, Ross, James, Keogh, Justin WL and Lorenzen, Christian. (2017) Hamstring myoelectrical activity during three different kettlebell swing exercises. Journal of Strength and Conditioning Research. https://doi.org/10.1519/JSC.0000000000002254

Journal article

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

Journal article

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. https://doi.org/10.1249/MSS.0000000000001333

Journal article

Impact of exercise selection on hamstring muscle activation
Bourne, Matthew N., Williams, Morgan, Opar, David, Najjar, Aiman A., Kerr, Graham and Shield, Anthony J.. (2017) Impact of exercise selection on hamstring muscle activation. British Journal of Sports Medicine. 51(13), pp. 1021 - 1028. https://doi.org/10.1136/bjsports-2015-095739

Journal article

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

Journal article

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

Journal article

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

Journal article

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

Journal article

Architectural changes of the biceps femoris long head after concentric or eccentric training
Timmins, Ryan G., Ruddy, Joshua D., Presland, Joel, Maniar, Nirav, Shield, Anthony J., Williams, Morgan D. and Opar, David. (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

Journal article

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

Journal article

Hamstring strength and flexibility after hamstring strain injury: A systematic review and meta-analysis
Maniar, Nirav, Shielf, Anthony J., Williams, Morgan, Timmins, Ryan G. and Opar, David. (2016) Hamstring strength and flexibility after hamstring strain injury: A systematic review and meta-analysis. British Journal of Sports Medicine. 50(15). https://doi.org/10.1136/bjsports-2015-095311

Journal article

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

Journal article

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

Journal article

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

Journal article

Effect of high-speed running on hamstring strain injury risk
Duhig, Steven, Shield, Anthony J., Opar, David, Gabbett, Timothy James, Ferguson, Cameron and Williams, Morgan. (2016) Effect of high-speed running on hamstring strain injury risk. British Journal of Sports Medicine. 50(24), pp. 1536 - 1540. https://doi.org/10.1136/bjsports-2015-095679

Journal article

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

Journal article

Muscle activation patterns in the Nordic hamstring exercise: Impact of prior strain injury
Bourne, Matthew N., Opar, David, Williams, Morgan David, Al Najjar, Aiman 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), pp. 666 - 674. https://doi.org/10.1111/sms.12494

Journal article

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

Journal article

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

Journal article

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

Journal article

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

Journal article

Eccentric hamstring strength and hamstring injury risk in Australian footballers
Opar, David, Williams, Morgan, Timmins, Ryan Gregory, Hickey, Jack, Duhig, Steven and Shield, Anthony. (2015) Eccentric hamstring strength and hamstring injury risk in Australian footballers. Medicine and Science in Sports and Exercise. 47(4), pp. 857 - 865. https://doi.org/10.1249/MSS.0000000000000465

Journal article

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

Journal article

The impact of previous hamstring strain injury on the change in eccentric hamstring strength during pre-season training in elite Australian footballers
Opar, David, Williams, Morgan, Timmins, Ryan, Hickey, Jack, Duhig, Steven and Shield, Anthony. (2015) The impact of previous hamstring strain injury on the change in eccentric hamstring strength during pre-season training in elite Australian footballers. American Journal of Sports Medicine. 43(2). https://doi.org/10.1177/0363546514556638

Journal article

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

Journal article

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

Journal article

The effect of previous hamstring strain injuries on the change in eccentric hamstring strength during preseason training in elite Australian footballers
Opar, David, Williams, Morgan, Timmins, Ryan, Hickey, Jack, Duhig, Steven and Shield, Anthony. (2015) The effect of previous hamstring strain injuries 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

Journal article

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), pp. 401 - 405. https://doi.org/10.1016/j.apmr.2013.07.028

Journal article

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

Journal article

Reduced biceps femoris myoelectrical activity influences eccentric knee flexor weakness after repeat sprint running
Timmins, Ryan Gregory, Opar, David, Williams, Morgan, Schache, Anthony, Dear, Nuala and Shield, Anthony. (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

Journal article

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), pp. e254 - e259. https://doi.org/10.1111/sms.12159

Journal article

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

Journal article

Reduced biceps femoris myoelectrical activity influences eccentric knee flexor weakness after repeat sprint running
Timmins, Ryan Gregory, Opar, David, Williams, Morgan, Schache, Anthony, Dear, Nuala and Shield, Anthony 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). https://doi.org/10.1111/sms.12171

Journal article

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

Journal article

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

Journal article

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

Journal article

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

Journal article

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

Journal article

Knee flexor stength and bicep femoris electromyographical activity is lower in previously strained hamstrings
Opar, David, Williams, Morgan, Timmins, Ryan Gregory, Dear, Nuala and Shield, Anthony. (2013) Knee flexor stength and bicep femoris electromyographical activity is lower in previously strained hamstrings. Journal of Electromyography and Kinesiology. https://doi.org/10.1016/j.jelekin.2012.11.004

Journal article

A novel device using the Nordic hamstring exercise to assess eccentric knee flexor strength: A reliability and retrospective injury study
Opar, David, Piatkowski, Timothy, Williams, Morgan and Shield, Anthony. (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

Journal article

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). https://doi.org/10.1016/j.jelekin.2012.12.006

Journal article

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

Journal article

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

Journal article

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