All Outputs (227)

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.

Mechanical determinants of faster change of direction speed performance in male athletes (2016)
Journal Article
Dos'Santos, T., Thomas, C., Jones, P., & Comfort, P. (2017). Mechanical determinants of faster change of direction speed performance in male athletes. Journal of Strength and Conditioning Research, 31(3), 696-705. https://doi.org/10.1519/JSC.0000000000001535

Mechanical variables during change of directions for example braking and propulsive forces,impulses and ground contact times (GCT) have been identified as determinants of faster change of direction speed (CODS) performance. The purpose of this study... Read More about Mechanical determinants of faster change of direction speed performance in male athletes.

Effects of strength training on squat and sprint performance in soccer players (2016)
Journal Article
Styles, W., Matthews, M., & Comfort, P. (2016). Effects of strength training on squat and sprint performance in soccer players. Journal of Strength and Conditioning Research, 30(6), 1534-1539. https://doi.org/10.1519/JSC.0000000000001243

Researchers have demonstrated that increases in strength result in increases in athletic performance, although the development of strength is still neglected in some sports. Our aim was to determine whether a simple in-season strength training progra... Read More about Effects of strength training on squat and sprint performance in soccer players.

Within- and between-session reliability of medial gastrocnemius architectural properties (2016)
Journal Article
McMahon, J., Turner, A., & Comfort, P. (2016). Within- and between-session reliability of medial gastrocnemius architectural properties. Biology of Sport, 33(2), 185-188. https://doi.org/10.5604/20831862.1200511

This study aimed to determine the within- and between-session reliability of medial gastrocnemius (MG) architecture (e.g. muscle thickness (MT), fascicle length (FL) and pennation angle (PA)), as derived via ultrasonography followed by manual digit... Read More about Within- and between-session reliability of medial gastrocnemius architectural properties.

Reliability of the 505 change-of-direction test in netball players (2016)
Journal Article
Barber, O., Thomas, C., Jones, P., McMahon, J., & Comfort, P. (2016). Reliability of the 505 change-of-direction test in netball players. International Journal of Sports Physiology and Performance, 11(3), 377-380. https://doi.org/10.1123/ijspp.2015-0215

PURPOSE: To determine the reliability of the 505 change-of-direction (COD) test performed with both a stationary and a flying start. METHODS: Fifty-two female netball players (age 23.9 ± 5.4 y, height 169.9 ± 3.3 cm, body mass 65.2 ± 4.6 kg) pe... Read More about Reliability of the 505 change-of-direction test in netball players.

Comparison of peak power output during exercises with similar lower-limb kinematics (2016)
Journal Article
with similar lower-limb kinematics. Journal of trainology, 5(1), 1-5. https://doi.org/10.17338/trainology.5.1_1

Objectives: The aim of this investigation was to compare peak power between the mid-thigh power clean, squat jump and push press. Design and Methods: Eleven recreationally trained men (age 22.2 ± 3.5 yrs; height 178.6 ± 8.5 cm; body mass 88.7 ± 13.... Read More about Comparison of peak power output during exercises with similar lower-limb kinematics.

Effect of sampling frequency on isometric midthigh-pull kinetics (2016)
Journal Article
Dos’Santos, T., Jones, P., Kelly, J., McMahon, J., Comfort, P., & Thomas, C. (2016). Effect of sampling frequency on isometric midthigh-pull kinetics. International Journal of Sports Physiology and Performance, 11(2), 255-260. https://doi.org/10.1123/ijspp.2015-0222

Purpose: Skeletal-muscle function can be evaluated using force–times curves generated via the isometric midthigh pull (IMTP). Various sampling frequencies (500–1000 Hz) have been used for IMTP assessments; however, no research has investigated the in... Read More about Effect of sampling frequency on isometric midthigh-pull kinetics.