Mr John McMahon's Outputs (100)

A comparison of kinetic and kinematic variables during the midthigh pull and countermovement shrug, across loads (2020)
Journal Article
Meechan, D., Suchomel, T., McMahon, J., & Comfort, P. (2020). A comparison of kinetic and kinematic variables during the midthigh pull and countermovement shrug, across loads. Journal of Strength and Conditioning Research, 34(7), 1830-1841. https://doi.org/10.1519/JSC.0000000000003288

This study compared kinetic and kinematic variables during the midthigh pull (MTP) and countermovement shrug (CMS). Eighteen men (age: 29.43 ± 3.95 years, height: 1.77 ± 0.08 m, body mass: 84.65 ± 18.79 kg, and 1 repetition maximum [1RM] power clean:... Read More about A comparison of kinetic and kinematic variables during the midthigh pull and countermovement shrug, across loads.

A comparison of kinetic and kinematic variables during the pull from the knee and hang pull, across loads (2020)
Journal Article
Meechan, D., McMahon, J., Suchomel, T., & Comfort, P. (2020). A comparison of kinetic and kinematic variables during the pull from the knee and hang pull, across loads. Journal of Strength and Conditioning Research, 34(7), 1819-1829. https://doi.org/10.1519/JSC.0000000000003593

Kinetic and kinematic variables during the pull from the knee (PFK) and hang pull (HP) were compared in this study. Eighteen men (age = 29.43 ± 3.95 years; height 1.77 ± 0.08 m; body mass 84.65 ± 18.79 kg) performed the PFK and HP with 40, 60, 80, 10... Read More about A comparison of kinetic and kinematic variables during the pull from the knee and hang pull, across loads.

Changes in early and maximal isometric force production in response to moderate- and high-load strength and power training (2020)
Journal Article
Comfort, P., Jones, P., Thomas, C., Dos'Santos, T., McMahon, J., & Suchomel, T. (2020). Changes in early and maximal isometric force production in response to moderate- and high-load strength and power training. Journal of Strength and Conditioning Research, https://doi.org/10.1519/JSC.0000000000003544

The aims of this study were to determine the changes in early (50-, 100-, 150-, 200-, 250 ms) and maximal isometric force production, in response to a 4-week period of moderate-load resistance training (60-82.5% 1 repetition maximum [1RM]), followed... Read More about Changes in early and maximal isometric force production in response to moderate- and high-load strength and power training.

Reply to: "Comment on : the effect of Nordic hamstring exercise intervention volume on eccentric strength and muscle architecture adaptations : a systematic review and meta-analyses" (2019)
Journal Article
Cuthbert, M., Ripley, N., McMahon, J., Evans, M., Haff, G., & Comfort, P. (2020). Reply to: "Comment on : the effect of Nordic hamstring exercise intervention volume on eccentric strength and muscle architecture adaptations : a systematic review and meta-analyses". Sports Medicine, 50, 223-225. https://doi.org/10.1007/s40279-019-01245-z

Letter to the Editor

Contribution of eccentric strength to cutting performance in female soccer players (2019)
Journal Article
Jones, P., Dos'Santos, T., McMahon, J., & Graham-Smith, P. (2019). Contribution of eccentric strength to cutting performance in female soccer players. Journal of Strength and Conditioning Research, https://doi.org/10.1519/JSC.0000000000003433

The aim of this study was to examine the contribution of eccentric strength to performance of a 70-90° cutting task (CUT) (time to complete: 5 m approach, 70-90° cut, 3 m exit). Nineteen female soccer players (mean ± SD age, height and mass; 21.6 ± 4... Read More about Contribution of eccentric strength to cutting performance in female soccer players.

Corrections to : The effect of Nordic hamstring exercise intervention volume on eccentric strength and muscle architecture adaptations : a systematic review and meta-analyses (2019)
Journal Article
Cuthbert, M., Ripley, N., McMahon, J., Evans, M., Haff, G., & Comfort, P. (2020). Corrections to : The effect of Nordic hamstring exercise intervention volume on eccentric strength and muscle architecture adaptations : a systematic review and meta-analyses. Sports Medicine, 50(1), 101-102. https://doi.org/10.1007/s40279-019-01208-4

Correction to: Sports Medicine https://doi.org/10.1007/s40279-019-01178-7

Comparison of countermovement jump–derived reactive strength index modified and underpinning force-time variables between super league and championship rugby league players (2019)
Journal Article
McMahon, J., Jones, P., & Comfort, P. (2019). Comparison of countermovement jump–derived reactive strength index modified and underpinning force-time variables between super league and championship rugby league players. Journal of Strength and Conditioning Research, https://doi.org/10.1519/JSC.0000000000003380

The countermovement jump (CMJ) is regularly tested in rugby league (RL), with recent work reporting reactive strength index modified (RSImod) to distinguish between levels of play. Differences in CMJ-derived RSImod and underpinning force-time variabl... Read More about Comparison of countermovement jump–derived reactive strength index modified and underpinning force-time variables between super league and championship rugby league players.

Normalization of early isometric force production as a percentage of peak force during multijoint isometric assessment (2019)
Journal Article
Comfort, P., Dos’Santos, T., Jones, P., McMahon, J., Suchomel, T., Bazyler, C., & Stone, M. (2020). Normalization of early isometric force production as a percentage of peak force during multijoint isometric assessment. International Journal of Sports Physiology and Performance, 15(4), 478-482. https://doi.org/10.1123/ijspp.2019-0217

Purpose: To determine the reliability of early force production (50-, 100-, 150-, 200-, 250 ms) relative to peak force (PF) during an isometric mid-thigh pull (IMTP) and assess the relationships between these variables. Methods: Male collegiate athle... Read More about Normalization of early isometric force production as a percentage of peak force during multijoint isometric assessment.

The effect of Nordic hamstring exercise intervention volume on eccentric strength and muscle architecture adaptations : a systematic review and meta-analyses (2019)
Journal Article
Cuthbert, M., Ripley, N., McMahon, J., Evans, M., Haff, G., & Comfort, P. (2020). The effect of Nordic hamstring exercise intervention volume on eccentric strength and muscle architecture adaptations : a systematic review and meta-analyses. Sports Medicine, 50, 83-99. https://doi.org/10.1007/s40279-019-01178-7

Although performance of the Nordic hamstring exercise (NHE) has been shown to elicit adaptations that may reduce hamstring strain injury (HSI) risk and occurrence, compliance in NHE interventions in professional soccer teams is low despite a high occ... Read More about The effect of Nordic hamstring exercise intervention volume on eccentric strength and muscle architecture adaptations : a systematic review and meta-analyses.

The effect of load placement on the power production characteristics of three lower extremity jumping exercises (2019)
Journal Article
Suchomel, T. J., McKeever, S. M., Sijuwade, O., Carpenter, L., McMahon, J., Loturco, I., & Comfort, P. (2019). The effect of load placement on the power production characteristics of three lower extremity jumping exercises. Journal of Human Kinetics, 68(1), 109-122. https://doi.org/10.2478/hukin-2019-0060

The purpose of this study was to compare the power production characteristics of the jump squat (JS), hexagonal barbell jump (HEXJ), and jump shrug (JShrug) across a spectrum of relative loads. Fifteen resistance-trained men completed three testing s... Read More about The effect of load placement on the power production characteristics of three lower extremity jumping exercises.

The reliability and validity of the bar-mounted PUSH BandTM 2.0 during bench press with moderate and heavy loads (2019)
Journal Article
Lake, J., Augustus, S., Austin, K., Comfort, P., McMahon, J., Mundy, P., & Haff, G. (2019). The reliability and validity of the bar-mounted PUSH BandTM 2.0 during bench press with moderate and heavy loads. Journal of Sports Sciences, 37(23), 2685-2690. https://doi.org/10.1080/02640414.2019.1656703

The aim of this study was to assess the reliability and validity of the bar-mounted PUSH BandTM 2.0 to determine peak and mean velocity during the bench press exercise with a moderate (60% one repetition maximum [1RM]) and heavy (90% 1RM) load. We di... Read More about The reliability and validity of the bar-mounted PUSH BandTM 2.0 during bench press with moderate and heavy loads.

Effect of onset threshold on kinetic and kinematic variables of a weightlifting derivative containing a first and second pull (2019)
Journal Article
James, L., Suchomel, T., McMahon, J., Chavda, S., & Comfort, P. (2020). Effect of onset threshold on kinetic and kinematic variables of a weightlifting derivative containing a first and second pull. Journal of Strength and Conditioning Research, 34(2), 298-307. https://doi.org/10.1519/JSC.0000000000003316

James, LP, Suchomel, TJ, McMahon, JJ, Chavda, S, and Comfort, P. Effect of onset threshold on kinetic and kinematic variables of a weightlifting derivative containing a first and second pull. J Strength Cond Res XX(X): 000-000, 2019-This study sought... Read More about Effect of onset threshold on kinetic and kinematic variables of a weightlifting derivative containing a first and second pull.

Changes in dynamic strength index in response to strength training (2018)
Journal Article
Comfort, P., Thomas, C., Dos'Santos, T., Suchomel, T., Jones, P., & McMahon, J. (2018). Changes in dynamic strength index in response to strength training. Sports, 6(4), 176. https://doi.org/10.3390/sports6040176

The primary aim of this investigation was to determine the effects of a four-week period of in-season strength training on the dynamic strength index (DSI). Pre and post a four-week period of strength-based training, twenty-four collegiate athletes (... Read More about Changes in dynamic strength index in response to strength training.

Optimizing Squat Technique—Revisited (2018)
Journal Article
Comfort, P., McMahon, J., & Suchomel, T. J. (2018). Optimizing Squat Technique—Revisited. Strength and Conditioning Journal, 40(6), 68-74. https://doi.org/10.1519/SSC.0000000000000398

The back squat is the cornerstone of many strength and conditioning programs, with increases in back squat strength associated with improvements in athletic performance. A variety of back squat techniques have been described throughout the literature... Read More about Optimizing Squat Technique—Revisited.

Within-subject consistency of unimodal and bimodal force application during the countermovement jump (2018)
Journal Article
Lake, J., & McMahon, J. (2018). Within-subject consistency of unimodal and bimodal force application during the countermovement jump. Sports, 6(4), 143. https://doi.org/10.3390/sports6040143

Countermovement jump (CMJ) force data are often time-normalized so researchers and practitioners can study the effect that sex, training status, and training intervention have on CMJ strategy: the so-called force⁻time curve shape. Data are often coll... Read More about Within-subject consistency of unimodal and bimodal force application during the countermovement jump.

The validity of the Push Band 2.0 during vertical jump performance (2018)
Journal Article
Lake, J., Augustus, S., Austin, K., Mundy, P., McMahon, J., Comfort, P., & Haff, G. (2018). The validity of the Push Band 2.0 during vertical jump performance. Sports, 6(4), 140. https://doi.org/10.3390/sports6040140

The Push Band has the potential to provide a cheap and practical method of measuring velocity and power during countermovement vertical jumping (CMJ). However, very little is known about whether it conforms to laboratory-based gold standards. The aim... Read More about The validity of the Push Band 2.0 during vertical jump performance.

Reliability of and relationship between flight time to contraction time ratio and reactive strength index modified (2018)
Journal Article
McMahon, J., Lake, J., & Comfort, P. (2018). Reliability of and relationship between flight time to contraction time ratio and reactive strength index modified. Sports, 6(3), 81. https://doi.org/10.3390/sports6030081

Countermovement jump (CMJ) force-time testing is commonly used to monitor seasonal alterations in athletes’ CMJ strategy (to infer alterations in neuromuscular function). The flight time to contraction time (FT:CT) ratio and reactive strength index m... Read More about Reliability of and relationship between flight time to contraction time ratio and reactive strength index modified.

Assessing the frequency and magnitude of match impacts accrued during an elite rugby union playing season (2018)
Journal Article
Grainger, A., McMahon, J., & Comfort, P. (2018). Assessing the frequency and magnitude of match impacts accrued during an elite rugby union playing season. International Journal of Performance Analysis in Sport, 18(4), 507-522. https://doi.org/10.1080/24748668.2018.1496392

The aim of this study was to identify position-related differences in absolute and relative match impacts in rugby union. Thirty-eight subjects were tracked, using GPS units containing inertial sensors, across one full playing season (n = 462 data se... Read More about Assessing the frequency and magnitude of match impacts accrued during an elite rugby union playing season.

An investigation into the effects of excluding the catch phase of the power clean on force-time characteristics during isometric and dynamic tasks (2018)
Journal Article
Comfort, P., Dos'Santos, T., Thomas, C., McMahon, J., & Suchomel, T. (2018). An investigation into the effects of excluding the catch phase of the power clean on force-time characteristics during isometric and dynamic tasks. Journal of Strength and Conditioning Research, 32(8), 2116-2129. https://doi.org/10.1519/JSC.0000000000002656

The aims of this study were to compare the effects of the exclusion or inclusion of the catch phase during power clean (PC) derivatives on force-time characteristics during isometric and dynamic tasks, after two 4-week mesocycles of resistance traini... Read More about An investigation into the effects of excluding the catch phase of the power clean on force-time characteristics during isometric and dynamic tasks.

Concurrent validity of a portable force plate using vertical jump force-time characteristics (2018)
Journal Article
Lake, J., Mundy, P., Comfort, P., McMahon, J., Suchomel, T., & Carden, P. (2018). Concurrent validity of a portable force plate using vertical jump force-time characteristics. Journal of Applied Biomechanics, 34(5), 410-413. https://doi.org/10.1123/jab.2017-0371

This study examined concurrent validity of countermovement vertical jump (CMJ) reactive strength index modified and force-time characteristics recorded using a one dimensional portable and laboratory force plate system. Twenty-eight men performed bil... Read More about Concurrent validity of a portable force plate using vertical jump force-time characteristics.