All Outputs (233)

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.

Comparison of methods of calculating dynamic strength index (2017)
Journal Article
Comfort, P., Thomas, C., Dos'Santos, T., Jones, P., Suchomel, T., & McMahon, J. (2017). Comparison of methods of calculating dynamic strength index. International Journal of Sports Physiology and Performance, 13(3), 320-325. https://doi.org/10.1123/ijspp.2017-0255

Purpose: To determine the reliability and variability of dynamic strength index (DSI) calculated from squat jump (SJ) (DSI-SJ) versus countermovement jump (CMJ) (DSI-CMJ) peak force (PF) and to compare DSI values between methods. Methods: Male youth... Read More about Comparison of methods of calculating dynamic strength index.

A comparison of catch phase force-time characteristics during clean derivatives from the knee (2017)
Journal Article
Comfort, P., Williams, R., Suchomel, T., & Lake, J. (2017). A comparison of catch phase force-time characteristics during clean derivatives from the knee. Journal of Strength and Conditioning Research, 31(7), 1911-1918. https://doi.org/10.1519/JSC.0000000000001660

The aim of this study was to compare load-absorption force-time characteristics of the clean from the knee (CK), power clean from the knee (PCK) and clean pull from the knee (CPK). Ten collegiate athletes (age 27.5 ± 4.2 years; height 180.4 ± 6.7 cm;... Read More about A comparison of catch phase force-time characteristics during clean derivatives from the knee.

Countermovement jump phase characteristics of senior and academy rugby league players (2017)
Journal Article
McMahon, J., Murphy, S., Rej, S., & Comfort, P. (2017). Countermovement jump phase characteristics of senior and academy rugby league players. International Journal of Sports Physiology and Performance, 12(6), 803-811. https://doi.org/10.1123/ijspp.2016-0467

Purpose: Gross measures of countermovement jump (CMJ) performance are commonly used to track maturational changes in neuromuscular function within rugby league (RL). The purpose of this study was to conduct both a gross and a more detailed tempor... Read More about Countermovement jump phase characteristics of senior and academy rugby league players.

Influence of reactive strength index modified on force- and power-time curves (2017)
Journal Article
McMahon, J., Jones, P., Suchomel, T., Lake, J., & Comfort, P. (2017). Influence of reactive strength index modified on force- and power-time curves. International Journal of Sports Physiology and Performance, 13(2), 220-227. https://doi.org/10.1123/ijspp.2017-0056

Purpose: The reactive strength index modified (RSImod) has been recently identified and validated as a method of monitoring countermovement jump (CMJ) performance. The kinetic and kinematic mechanisms that optimize a higher RSImod score are, however,... Read More about Influence of reactive strength index modified on force- and power-time curves.

Physical profiles of female academy netball players by position (2017)
Journal Article
Thomas, C., Ismail, K., Simpson, R., Comfort, P., Jones, P., & Dos’Santos, T. (2019). Physical profiles of female academy netball players by position. Journal of Strength and Conditioning Research, 33(6), 1. https://doi.org/10.1519/JSC.0000000000001949

The purpose of this study was to evaluate the height, body mass and physical characteristics of female academy netball players by position (centers, defenders and shooters). Data were collected on 43 regional academy players during the preseason peri... Read More about Physical profiles of female academy netball players by position.

Between-session reliability of common strength- and power-related measures in adolescent athletes (2017)
Journal Article
Thomas, C., Dos'Santos, T., Comfort, P., & Jones, P. (2017). Between-session reliability of common strength- and power-related measures in adolescent athletes. Sports, 5(1), 15. https://doi.org/10.3390/sports5010015

The purpose of this study was to investigate the between-session reliability of common strength- and power-related measures in adolescent athletes. Seventeen adolescent athletes (males: n = 8: age 17.1 ± 2.2 years; height 175.6 ± 3.5 cm; mass 80.2 ±... Read More about Between-session reliability of common strength- and power-related measures in adolescent athletes.

Enhancing the force-velocity profile of athletes using weightlifting derivatives (2017)
Journal Article
Suchomel, T., Comfort, P., & Lake, P. (2017). Enhancing the force-velocity profile of athletes using weightlifting derivatives. Strength and Conditioning Journal, 39(1), 10-20. https://doi.org/10.1519/SSC.0000000000000275

Weightlifting movements and their derivatives may be implemented in a sequenced progression throughout the training year to optimize the development of an athlete’s strength, rate of force development, and power output. Weightlifting movements and th... Read More about Enhancing the force-velocity profile of athletes using weightlifting derivatives.

Sex differences in countermovement jump phase characteristics (2017)
Journal Article
McMahon, J., Rej, S., & Comfort, P. (2017). Sex differences in countermovement jump phase characteristics. Sports, 5(1), 8. https://doi.org/10.3390/sports5010008

The countermovement jump (CMJ) is commonly used to explore sex differences in neuromuscular function, but previous studies have only reported gross CMJ measures or have partly examined CMJ phase characteristics. The purpose of this study was to explo... Read More about Sex differences in countermovement jump phase characteristics.

Changes in strength, power, and speed across a season in English county cricketers (2017)
Journal Article
Carr, C., McMahon, J., & Comfort, P. (2017). Changes in strength, power, and speed across a season in English county cricketers. International Journal of Sports Physiology and Performance, 12(1), 50-55. https://doi.org/10.1123/ijspp.2015-0524

PURPOSE: Previous research has investigated changes in athletes' strength, power, and speed performances across the competitive season of many sports, although this has not been explored in cricketers. The aim of this study was to investigate changes... Read More about Changes in strength, power, and speed across a season in English county cricketers.

The relationship between 2D knee valgus angle during single leg squat, single leg land and drop jump screening tests (2017)
Journal Article
Munro, A., Herrington, L., & Comfort, P. (2017). The relationship between 2D knee valgus angle during single leg squat, single leg land and drop jump screening tests. Journal of Sport Rehabilitation, 26(1), 72-77. https://doi.org/10.1123/jsr.2015-0102

Context: Injuries to the anterior cruciate ligament (ACL) and patellofemoral joint (PFJ) are a significant problem in female athletes. A number of screening tasks have been used in the literature to identify those at greatest risk of injury. To dat... Read More about The relationship between 2D knee valgus angle during single leg squat, single leg land and drop jump screening tests.

Relationship between maximum aerobic speed performance and distance covered in rugby union games (2016)
Journal Article
Swaby, R., Jones, P. A., & Comfort, P. (2016). Relationship between maximum aerobic speed performance and distance covered in rugby union games. Journal of Strength and Conditioning Research, 30(10), 2788-2793. https://doi.org/10.1519/JSC.0000000000001375

Relationship between maximum aerobic speed performance and distance covered in rugby union games. J Strength Cond Res 30(10): 2788–2793, 2016—Researchers have shown a clear relationship between aerobic fitness and the distance covered in professional... Read More about Relationship between maximum aerobic speed performance and distance covered in rugby union games.

A comparison of frontal plane projection angle across landing tasks in female gymnasts (2016)
Journal Article
Comfort, P., Colclough, A., & Herrington, L. (2016). A comparison of frontal plane projection angle across landing tasks in female gymnasts. International Journal of Athletic Therapy and Training, 21(5), 42-47. https://doi.org/10.1123/ijatt.2015-0068

The aim of this study was to compare FPPA between three landing tasks and determine the reliability of FPPA in 15 competitive female gymnasts (age 13.5 ± 2.07 years). Reliability of FPPA was highest in the drop landing task, with no learning effect p... Read More about A comparison of frontal plane projection angle across landing tasks in female gymnasts.

Assessing muscle strength asymmetry via a unilateral stance isometric mid-thigh pull (2016)
Journal Article
Dos'Santos, T., Thomas, C., Jones, P., & Comfort, P. (2017). Assessing muscle strength asymmetry via a unilateral stance isometric mid-thigh pull. International Journal of Sports Physiology and Performance, 12(4), 505-511. https://doi.org/10.1123/ijspp.2016-0179

Purpose: The purpose of this study was to investigate the within-session reliability of bilateral and unilateral stance isometric mid-thigh pull (IMTP) force-time characteristics including peak force (PF), relative PF and impulse at time bands (0-100... Read More about Assessing muscle strength asymmetry via a unilateral stance isometric mid-thigh pull.

A methodological approach to quantifying plyometric intensity (2016)
Journal Article
Jarvis, M., Graham-Smith, P., & Comfort, P. (2016). A methodological approach to quantifying plyometric intensity. Journal of Strength and Conditioning Research, 30(9), 2522-2532. https://doi.org/10.1519/JSC.0000000000000518

In contrast to other methods of training, the quantification of plyometric exercise intensity is poorly defined. The purpose of this study was to evaluate the suitability of a range of neuromuscular and mechanical variables to describe the intensity... Read More about A methodological approach to quantifying plyometric intensity.