All Outputs (227)

Effect of Barbell Load on Vertical Jump Landing Force-Time Characteristics (2018)
Journal Article
Lake, J. P., Mundy, P. D., Comfort, P., McMahon, J. J., Suchomel, T. J., & Carden, P. (2023). Effect of Barbell Load on Vertical Jump Landing Force-Time Characteristics. Journal of Strength and Conditioning Research, 35(1), 25-32. https://doi.org/10.1519/jsc.0000000000002554

The aim of this study was to quantify the effect that barbell load has on the jump height and force-time characteristics of the countermovement jump (CMJ). Fifteen strength-trained men (mean ± SD: age 23 ± 2 years, mass 84.9 ± 8.1 kg, height 1.80 ± 0... Read More about Effect of Barbell Load on Vertical Jump Landing Force-Time Characteristics.

Asymmetries in isometric force-time characteristics are not detrimental to change of direction speed (2018)
Journal Article
Dos'Santos, T., Thomas, C., Jones, P., & Comfort, P. (2018). Asymmetries in isometric force-time characteristics are not detrimental to change of direction speed. Journal of Strength and Conditioning Research, 32(2), 520-527. https://doi.org/10.1519/JSC.0000000000002327

The purpose of this study was to determine the impact of between-limb asymmetries in isometric midthigh pull (IMTP) force-time characteristics on change of direction speed (CODS). Twenty multisport collegiate athletes (mean ± SD: age: 21.0 ± 1.9 year... Read More about Asymmetries in isometric force-time characteristics are not detrimental to change of direction speed.

Relationship Between Reactive Strength Index Variants in Rugby League Players (2018)
Journal Article
McMahon, J. J., Suchomel, T. J., Lake, J. P., & Comfort, P. (2023). Relationship Between Reactive Strength Index Variants in Rugby League Players. Journal of Strength and Conditioning Research, 35(1), 280-285. https://doi.org/10.1519/jsc.0000000000002462

Two reactive strength index (RSI) variants exist, the RSI and RSI modified (RSImod) which are typically calculated during the drop jump (DJ) and countermovement jump (CMJ), respectively. Both RSI variants have been used to monitor athletes’ ability t... Read More about Relationship Between Reactive Strength Index Variants in Rugby League Players.

Understanding the key phases of the countermovement jump force-time curve (2018)
Journal Article
McMahon, J., Suchomel, T., Lake, J., & Comfort, P. (2018). Understanding the key phases of the countermovement jump force-time curve. Strength and Conditioning Journal, 40(4), 96-106. https://doi.org/10.1519/SSC.0000000000000375

The countermovement jump (CMJ) test is commonly conducted to assess neuromuscular function and is being increasingly performed using force platforms. Comprehensive insight into athletes’ neuromuscular function can be gained through detailed analys... Read More about Understanding the key phases of the countermovement jump force-time curve.

Effect of low-pass filtering on isometric midthigh pull kinetics (2018)
Journal Article
Dos'Santos, T., Lake, J., Jones, P., & Comfort, P. (2018). Effect of low-pass filtering on isometric midthigh pull kinetics. Journal of Strength and Conditioning Research, 32(4), 983-989. https://doi.org/10.1519/JSC.0000000000002473

The purpose of this study was to investigate the effect of low-pass filtering on isometric mid-thigh pull (IMTP) kinetics, including body weight (BW), onset threshold force, time-specific force values (50, 100, 150 and 200 ms) and peak force (PF). Fo... Read More about Effect of low-pass filtering on isometric midthigh pull kinetics.

Assessing asymmetries in change of direction speed performance; application of change of direction deficit (2018)
Journal Article
Dos'Santos, T., Thomas, C., Jones, P., & Comfort, P. (2019). Assessing asymmetries in change of direction speed performance; application of change of direction deficit. Journal of Strength and Conditioning Research, 33(11), 2953-2961. https://doi.org/10.1519/JSC.0000000000002438

The aims of this study were to quantify asymmetries in change of direction (COD) performance via completion time and COD deficit, and determine its influence on asymmetry profiling of COD ability. A secondary aim was to evaluate the relationship betw... Read More about Assessing asymmetries in change of direction speed performance; application of change of direction deficit.

Comparison of the force-, velocity- and power-time curves between the concentric-only and eccentric-concentric bench press exercises (2018)
Journal Article
Pérez-Castilla, A., Comfort, P., McMahon, J., Pestaña-Melero, F., & García-Ramos, A. (2020). Comparison of the force-, velocity- and power-time curves between the concentric-only and eccentric-concentric bench press exercises. Journal of Strength and Conditioning Research, 34(6), 1618-1624. https://doi.org/10.1519/JSC.0000000000002448

The aim of this study was to compare the temporal and mechanical variables between the concentric-only and eccentric-concentric bench press (BP) variants. Twenty-one men (age: 22.0±4.2 years, body mass: 73.4±7.7 kg, height: 177.2±8.0 cm; one-repetiti... Read More about Comparison of the force-, velocity- and power-time curves between the concentric-only and eccentric-concentric bench press exercises.

A comparison of isometric midthigh-pull strength, vertical jump, sprint speed, and change-of-direction speed in academy netball players (2017)
Journal Article
Thomas, C., Comfort, P., Jones, P. A., & Dos’Santos, T. (2017). A comparison of isometric midthigh-pull strength, vertical jump, sprint speed, and change-of-direction speed in academy netball players. International Journal of Sports Physiology and Performance, 12(7), 916-921. https://doi.org/10.1123/ijspp.2016-0317

Purpose: To investigate the relationships between maximal isometric strength, vertical jump (VJ), sprint speed, and change-of-direction speed (CoDS) in academy netball players and determine whether players who have high performance in isometric stre... Read More about A comparison of isometric midthigh-pull strength, vertical jump, sprint speed, and change-of-direction speed in academy netball players.

Effect of different onset thresholds on isometric midthigh pull force-time variables (2017)
Journal Article
Dos'Santos, T., Jones, P., Comfort, P., & Thomas, C. (2017). Effect of different onset thresholds on isometric midthigh pull force-time variables. Journal of Strength and Conditioning Research, 31(12), 3463-3473. https://doi.org/10.1519/JSC.0000000000001765

Dos'Santos, T, Jones, PA, Comfort, P, and Thomas, C. Effect of different onset thresholds on isometric midthigh pull force-time variables. J Strength Cond Res 31(12): 3463–3473, 2017—Various thresholds have been used to identify the onset of contract... Read More about Effect of different onset thresholds on isometric midthigh pull force-time variables.

Lack of effect of ankle position during the Nordic curl on muscle activity of the biceps femoris and medial gastrocnemius (2017)
Journal Article
Comfort, P., Regan, A., Herrington, L., Thomas, C., McMahon, J., & Jones, P. (2017). Lack of effect of ankle position during the Nordic curl on muscle activity of the biceps femoris and medial gastrocnemius. Journal of Sport Rehabilitation, 26(3), 202-207. https://doi.org/10.1123/jsr.2015-0130

Context: Regular performance (~2×/wk) of Nordic curls has been shown to increase hamstring strength and reduce the risk of hamstring strain injury, although no consensus on ankle position has been provided. Objective: To compare the effects of p... Read More about Lack of effect of ankle position during the Nordic curl on muscle activity of the biceps femoris and medial gastrocnemius.

Load absorption force-time characteristics following the second pull of weightlifting derivatives (2017)
Journal Article
Suchomel, T. J., Lake, J. P., & Comfort, P. (2017). Load absorption force-time characteristics following the second pull of weightlifting derivatives. Journal of Strength and Conditioning Research, 31(6), 1644-1652. https://doi.org/10.1519/JSC.0000000000001634

Load absorption force-time characteristics following the second pull of weightlifting derivatives. J Strength Cond Res 31(6): 1644–1652, 2017—The purpose of this study was to compare the load absorption force-time characteristics of weightlifting cat... Read More about Load absorption force-time characteristics following the second pull of weightlifting derivatives.

The effects of a four week jump-training program on frontal plane projection angle in female gymnasts (2017)
Journal Article
Colclough, A., Munro, A., Herrington, L., McMahon, J., & Comfort, P. (2018). The effects of a four week jump-training program on frontal plane projection angle in female gymnasts. Physical Therapy in Sport, 30, 29-33. https://doi.org/10.1016/j.ptsp.2017.11.003

Objectives: To investigate the effects of a four week jump training program on frontal plane projection angle (FPPA) in young female gymnasts. Design: Intervention study, consisting of a four week jump training program performed for 15 minutes as... Read More about The effects of a four week jump-training program on frontal plane projection angle in female gymnasts.

Returners exhibit greater jumping performance improvements during a peaking phase compared to new players on a volleyball team (2017)
Journal Article
Bazyler, C., Mizuguchi, S., Kavanaugh, A., McMahon, J., Comfort, P., & Stone, M. (2017). Returners exhibit greater jumping performance improvements during a peaking phase compared to new players on a volleyball team. International Journal of Sports Physiology and Performance, 13(6), 709-716. https://doi.org/10.1123/ijspp.2017-0474

Purpose: To determine if jumping performance changes during a peaking phase differed between returners and new players in a female collegiate volleyball team and to determine which variables best explained the variation in performance changes. Metho... Read More about Returners exhibit greater jumping performance improvements during a peaking phase compared to new players on a volleyball team.

The effect of hip joint angle on isometric midthigh pull kinetics (2017)
Journal Article
Dos'Santos, T., Thomas, C., Jones, P., McMahon, J., & Comfort, P. (2017). The effect of hip joint angle on isometric midthigh pull kinetics. Journal of Strength and Conditioning Research, 31(10), 2748-2757. https://doi.org/10.1519/JSC.0000000000002098

The aim of this study were to compare isometric midthigh pull (IMTP) peak force (PF), time-specific force values (100-, 150-, and 200 ms), rate of force development (RFD) at predetermined time bands (0–100, 0–150, and 0–200 ms) and net forces between... Read More about The effect of hip joint angle on isometric midthigh pull kinetics.

Influence of dynamic strength index on countermovement jump force-, power-, velocity-, and displacement-time curves (2017)
Journal Article
McMahon, J., Jones, P., Dos'Santos, T., & Comfort, P. (2017). Influence of dynamic strength index on countermovement jump force-, power-, velocity-, and displacement-time curves. Sports, 5(4), 72-83. https://doi.org/10.3390/sports5040072

The dynamic strength index (DSI), often calculated as the ratio of countermovement jump (CMJ) propulsion peak force to isometric mid-thigh pull (IMTP) peak force, is said to inform whether ballistic or maximal strength training is warranted for a giv... Read More about Influence of dynamic strength index on countermovement jump force-, power-, velocity-, and displacement-time curves.

Relationships between isometric force-time characteristics and dynamic performance (2017)
Journal Article
Dos'Santos, T., Thomas, C., Comfort, P., McMahon, J., & Jones, P. (2017). Relationships between isometric force-time characteristics and dynamic performance. Sports, 5(3), https://doi.org/10.3390/sports5030068

The purpose of this study was to explore the relationships between isometric mid-thigh pull (IMTP) force-time characteristics (peak force and time-specific force vales (100–250 ms)) and dynamic performance and compare dynamic performance between stro... Read More about Relationships between isometric force-time characteristics and dynamic performance.

Strength and Conditioning for Netball: A Needs Analysis and Training Recommendations (2017)
Journal Article
Thomas, C., Comfort, P., Jones, P. A., & Dos'Santos, T. (2017). Strength and Conditioning for Netball: A Needs Analysis and Training Recommendations. Strength and Conditioning Journal, 39(4), 10-21. https://doi.org/10.1519/SSC.0000000000000287

There is a lack of strength and conditioning research into the demands and the specific areas of development required to optimize performance and reduce the risk of common injuries in female netball athletes. Netball is predominantly anaerobic, chara... Read More about Strength and Conditioning for Netball: A Needs Analysis and Training Recommendations.

Comment on : "Anthropometric and physical qualities of elite male youth rugby league players" (2017)
Journal Article
McMahon, J., Jones, P., & Comfort, P. (2017). Comment on : "Anthropometric and physical qualities of elite male youth rugby league players". Sports Medicine, 47(12), 2667-2668. https://doi.org/10.1007/s40279-017-0771-6

We read with interest the recent review on anthropometric and physical qualities of elite male youth rugby league players by Till et al. and congratulate the authors for producing a very informative review. However, we would like to raise an issue th... Read More about Comment on : "Anthropometric and physical qualities of elite male youth rugby league players".

Determining bilateral strength imbalances in youth basketball athletes (2017)
Journal Article
Thomas, C., Comfort, P., Dos’Santos, T., & Jones, P. (2017). Determining bilateral strength imbalances in youth basketball athletes. International Journal of Sports Medicine, 38(09), 683-690. https://doi.org/10.1055/s-0043-112340

The aims of this study were: 1) to compare the strongest (D) and weakest (ND) limbs in determining muscle strength asymmetry (MSA) ratios among various muscle strength qualities and 2) to determine the relationships among various muscle strength qual... Read More about Determining bilateral strength imbalances in youth basketball athletes.

Assessment of loaded squat jump height with a free-weight barbell and Smith machine : comparison of the take-off velocity and flight time procedures (2017)
Journal Article
Pérez-Castilla, A., McMahon, J., Comfort, P., & García-Ramos, A. (2020). Assessment of loaded squat jump height with a free-weight barbell and Smith machine : comparison of the take-off velocity and flight time procedures. Journal of Strength and Conditioning Research, 34(3), 671-677. https://doi.org/10.1519/JSC.0000000000002166

The aims of this study were to compare the reliability and magnitude of jump height between the two standard procedures of analysing force platform data to estimate jump height (take-off velocity [TOV] and flight time [FT]) in the loaded squat jump (... Read More about Assessment of loaded squat jump height with a free-weight barbell and Smith machine : comparison of the take-off velocity and flight time procedures.