Skip to main content

Research Repository

Advanced Search

All Outputs (104)

Role of the penultimate foot contact during change of direction : implications on performance and risk of injury (2019)
Journal Article
Dos'Santos, A., Thomas, C., Comfort, P., & Jones, P. (2019). Role of the penultimate foot contact during change of direction : implications on performance and risk of injury. Strength and Conditioning Journal, 41(1), 87-104. https://doi.org/10.1519/SSC.0000000000000395

Most change of direction biomechanical investigations and current technique guidelines focus on the role of the final foot contact (plant foot contact). However, it is evident that the braking characteristics during the penultimate foot contact pla... Read More about Role of the penultimate foot contact during change of direction : implications on performance and risk of injury.

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.

Comparison of change of direction speed performance and asymmetries between team-sport athletes : application of change of direction deficit (2018)
Journal Article
Dos'Santos, T., Thomas, C., Comfort, P., & Jones, P. (2018). Comparison of change of direction speed performance and asymmetries between team-sport athletes : application of change of direction deficit. Sports, 6(4), 174. https://doi.org/10.3390/sports6040174

The purpose of this study was twofold: (1) to examine differences in change of direction (COD) performance and asymmetries between team-sports while considering the effects of sex and sport; (2) to evaluate the relationship between linear speed, COD... Read More about Comparison of change of direction speed performance and asymmetries between team-sport athletes : application of change of direction deficit.

Average of trial peaks versus peak of average profile : impact on change of direction biomechanics (2018)
Journal Article
Dos'Santos, T., Comfort, P., & Jones, P. (2020). Average of trial peaks versus peak of average profile : impact on change of direction biomechanics. Sports Biomechanics, 19(4), 483-492. https://doi.org/10.1080/14763141.2018.1497197

The aims of this study were twofold: firstly, to compare lower limb kinematic and kinetic variables during a sprint and 90° cutting task between two averaging methods of obtaining discrete data (peak of average profile vs. average of individual trial... Read More about Average of trial peaks versus peak of average profile : impact on change of direction biomechanics.

Relationships between unilateral muscle strength qualities and change of direction in adolescent team-sport athletes (2018)
Journal Article
Thomas, C., Dos'Santos, T., Comfort, P., & Jones, P. (2018). Relationships between unilateral muscle strength qualities and change of direction in adolescent team-sport athletes. Sports, 6(3), 83. https://doi.org/10.3390/sports6030083

Previous studies have reported an association between global measures of bilateral strength and change of direction (COD) ability. Yet, little is known about the association between unilateral muscle strength qualities and COD ability. The aim of thi... Read More about Relationships between unilateral muscle strength qualities and change of direction in adolescent team-sport athletes.

The effect of angle and velocity on change of direction biomechanics : an angle-velocity trade-off (2018)
Journal Article
Dos'Santos, T., Thomas, C., Comfort, P., & Jones, P. (2018). The effect of angle and velocity on change of direction biomechanics : an angle-velocity trade-off. Sports Medicine, 48(10), 2235-2253. https://doi.org/10.1007/s40279-018-0968-3

Changes of direction (CODs) are key manoeuvres linked to decisive moments in sport and are also key actions associated with lower limb injuries. During sport athletes perform a diverse range of CODs, from various approach velocities and angles, thus... Read More about The effect of angle and velocity on change of direction biomechanics : an angle-velocity trade-off.

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.

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.

A preliminary investigation into a qualitative assessment tool to identify athletes with high knee abduction moments during cutting : Cutting Movement Assessment Score (CMAS) (2017)
Journal Article
Jones, P., Donelon, T., & Dos'Santos, T. (2017). A preliminary investigation into a qualitative assessment tool to identify athletes with high knee abduction moments during cutting : Cutting Movement Assessment Score (CMAS). Professional strength & conditioning,

Given the limited accessibility of 3D motion analysis for injury screening of athletes, there is a need to develop a field-based screening tool to identify athletes with ‘at-risk’ cutting mechanics. The aim of this preliminary study was to assess the... Read More about A preliminary investigation into a qualitative assessment tool to identify athletes with high knee abduction moments during cutting : Cutting Movement Assessment Score (CMAS).

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.

The application of change of direction deficit to evaluate cutting ability (2017)
Journal Article
Cuthbert, M., Dos'Santos, T., Thomas, C., & Jones, P. (2017). The application of change of direction deficit to evaluate cutting ability. Journal of Strength and Conditioning Research, 33(8), 2138-2144. https://doi.org/10.1519/JSC.0000000000002346

The purpose of this study was to examine the application of the change of direction deficit (CODD) to a 90° cut test in order to examine whether CODD provides a unique evaluation of an individual’s cutting ability. Thirty-six male collegiate team–spo... Read More about The application of change of direction deficit to evaluate cutting ability.

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.

A comparison of dynamic strength index between team-sport athletes (2017)
Journal Article
Thomas, C., Dos'Santos, T., & Jones, P. (2017). A comparison of dynamic strength index between team-sport athletes. Sports, 5(3), https://doi.org/10.3390/sports5030071

The purpose of this study was to examine the differences in countermovement jump peak force (CMJ-PF), isometric mid-thigh pull peak force (IMTP-PF), and resultant dynamic strength index (DSI) values between team-sport athletes. One hundred and fiftee... Read More about A comparison of dynamic strength index between team-sport athletes.

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.

Differences in vertical jump force-time characteristics between stronger and weaker adolescent basketball players (2017)
Journal Article
Thomas, C., Kyriakidou, I., Dos'Santos, T., & Jones, P. (2017). Differences in vertical jump force-time characteristics between stronger and weaker adolescent basketball players. Sports, 5(3), #63. https://doi.org/10.3390/sports5030063

The countermovement jump (CMJ) and isometric mid-thigh pull (IMTP) are commonly used to compare one’s force capacity during dynamic and isometric assessments, respectively. However, little research has investigated the influence of maximum isometric... Read More about Differences in vertical jump force-time characteristics between stronger and weaker adolescent basketball players.

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.