Dr Nicholas Ripley's Outputs (29)

Performance in Multi-Joint Force-Plate Assessments in Male and Female CrossFit® Athletes (2025)
Journal Article

Background: CrossFit® aims to be equitable between both males and female athletes, supporting equal representation and equal prize money at international events. However, to date, limited information is known on CrossFit® athletes’ performance in the... Read More about Performance in Multi-Joint Force-Plate Assessments in Male and Female CrossFit® Athletes.

Comparison of physical characteristics among english professional and semi-professional soccer players across different leagues (2025)
Journal Article

The purpose of the present study was to investigate if differences exist in neuromuscular qualities between different leagues in English male soccer. Twenty soccer players (age: 23.3 ± 5.2 years, stature: 180.3 ± 7.0 cm, mass: 82.5 ± 7.7 kg) from Eng... Read More about Comparison of physical characteristics among english professional and semi-professional soccer players across different leagues.

Scoping review of methods of monitoring acute changes in lower body neuromuscular function via force plates (2025)
Journal Article

Force plates are amongst the most utilised technological apparatus for monitoring acute changes in neuromuscular function in sports. Practitioners apply monitoring strategies to manage neuromuscular fatigue and physical preparedness with valid, relia... Read More about Scoping review of methods of monitoring acute changes in lower body neuromuscular function via force plates.

Effect of Relative Isometric Strength on Countermovement Jump Performance in Professional and Semi-Professional Soccer Players (2025)
Journal Article

As powerful actions commonly proceed goal scoring opportunities within soccer, enhancing powerful actions could be essential to optimize performance. There is a large body of evidence supporting the positive associations between maximal isometric mid... Read More about Effect of Relative Isometric Strength on Countermovement Jump Performance in Professional and Semi-Professional Soccer Players.

Practices and perceptions in hamstring training for injury risk mitigation: A survey-based mixed-methods analysis (2025)
Journal Article

In this study, the practices and perceptions of sport and exercise practitioners regarding hamstring training for injury risk mitigation were investigated. Hamstring strain injuries (HSIs) remain a prevalent issue across sports, despite extensive res... Read More about Practices and perceptions in hamstring training for injury risk mitigation: A survey-based mixed-methods analysis.

Match demands on officials and umpires across variations of lacrosse (2024)
Journal Article

The physical demands on lacrosse officials throughout different variants of the game remain largely unknown. The purpose of this study was to quantify the match demands of officials in field lacrosse (FL), box lacrosse (BL) and sixes lacrosse (SL). T... Read More about Match demands on officials and umpires across variations of lacrosse.

The Physical Performance Uncertainty Facing Lacrosse Officials for the Los Angeles Olympics in 2028 (2024)
Journal Article
Ripley, N., Fahey, J., & Quinn, M. (in press). The Physical Performance Uncertainty Facing Lacrosse Officials for the Los Angeles Olympics in 2028. Strength and Conditioning Journal, https://doi.org/10.1519/ssc.0000000000000873

Sixes Lacrosse (SL) is a newly developed format of field lacrosse (FL) to be included in the 2028 Los Angeles Olympics. Officials are crucial to upholding the rules of the game and maintaining player safety. There is currently no evidence of the matc... Read More about The Physical Performance Uncertainty Facing Lacrosse Officials for the Los Angeles Olympics in 2028.

Kinematic, Neuromuscular and Bicep Femoris In Vivo Mechanics during the Nordic Hamstring Exercise and Variations of the Nordic Hamstring Exercise (2024)
Journal Article

The Nordic hamstring exercise (NHE) is effective at decreasing hamstring strain injury risk. Limited information is available on the in vivo mechanics of the bicep femoris long head (BFLH) during the NHE. Therefore, the purpose of this study was to o... Read More about Kinematic, Neuromuscular and Bicep Femoris In Vivo Mechanics during the Nordic Hamstring Exercise and Variations of the Nordic Hamstring Exercise.

Early Versus Late Rapid Force Production During Single-Joint Isometric Hamstring Assessment Using Force Plates. (2024)
Journal Article
Ripley, N. J., Barber, R., Fahey, J. T., Fahey, J., & Comfort, P. (2024). Early Versus Late Rapid Force Production During Single-Joint Isometric Hamstring Assessment Using Force Plates. Journal of Strength and Conditioning Research, https://doi.org/10.1519/JSC.0000000000004911

Ripley, NJ, Barber, R, Fahey, JT, and Comfort, P. Early versus late rapid force production during single-joint isometric hamstring assessment using force plates. J Strength Cond Res XX(X): 000-000, 2024-The aim of this study was to assess differences... Read More about Early Versus Late Rapid Force Production During Single-Joint Isometric Hamstring Assessment Using Force Plates..

The Effect of Training Modalities on Bicep Femoris Fascicle Length Adaptations: A Systematic Review and Meta-analyses (2024)
Journal Article

Bicep femoris long head (BFLH) fascicle length (FL) is a modifiable risk factor of hamstring strain injury (HSI) and is extremely adaptable to imposed demands. The aim was to conduct a systematic review and meta-analysis to estimate the effects of di... Read More about The Effect of Training Modalities on Bicep Femoris Fascicle Length Adaptations: A Systematic Review and Meta-analyses.

Normalization of rapid force to peak force in an isometric hamstring assessment using force plates (2024)
Journal Article
Barber, R., Fahey, J., Comfort, P., & Ripley, N. (2024). Normalization of rapid force to peak force in an isometric hamstring assessment using force plates. Apunts Sports Medicine, 59(223), 100450. https://doi.org/10.1016/j.apunsm.2024.100450

Purpose The aim of this investigation was to determine the reliability of normalizing rapid force (RF) production to peak force assessed during an isometric knee flexor assessment, and to present a novel method of c... Read More about Normalization of rapid force to peak force in an isometric hamstring assessment using force plates.

Comparison between Short, Medium, and Long Fields of View in Estimating Bicep Femoris Fascicle Length (2024)
Journal Article

Measuring the bicep femoris long head fascicle length via the use of diagnostic ultrasound has become common practice within elite sport, using single images of between 4 and 6 cm. No study to date has compared single image estimations in terms of th... Read More about Comparison between Short, Medium, and Long Fields of View in Estimating Bicep Femoris Fascicle Length.

Effect of Sampling Frequency on a Unilateral Isometric Hamstring Strength Assessment Using Force Plates (2024)
Journal Article

The purpose of this study was to determine the effect of sampling frequency on the 90-90 (90-degrees hip and knee flexion) isometric hamstring assessment. Thirty-three elite female soccer players (age: 18.7 ± 3.7 years; height: 158.3 ± 5.9 cm; body m... Read More about Effect of Sampling Frequency on a Unilateral Isometric Hamstring Strength Assessment Using Force Plates.

Relative strength explains the differences in multi-joint rapid force production between sexes (2024)
Journal Article
Comfort, P., McMahon, J. J., Lake, J. P., Ripley, N. J., Triplett, N. T., & Haff, G. G. (in press). Relative strength explains the differences in multi-joint rapid force production between sexes. PloS one, 19(2), e0296877. https://doi.org/10.1371/journal.pone.0296877

The primary aim of this study was to determine whether relative strength explains the differences in the rapid force production (force developed during first 150-, 200-, and 250 ms) of females and males, and to evaluate the relationships between peak... Read More about Relative strength explains the differences in multi-joint rapid force production between sexes.

Lacrosse: Match Demands, Physical Performance, and Injury Surveillance a Scoping Review (2024)
Journal Article

Background Lacrosse has seen an uptake in participation in the last two decades. Moreover, with small-sided variants (box lacrosse (BL) and sixes lacrosse (SL)), with the latter being considered by the international Olympic committee. However, for at... Read More about Lacrosse: Match Demands, Physical Performance, and Injury Surveillance a Scoping Review.

Match Demands of Male International Lacrosse Players Competing Under the World Lacrosse Sixes Format in International Competition: Brief Report (2023)
Journal Article

World Lacrosse Sixes has only been developed recently, with very little known about the demands, therefore the purpose of this study is to identify competitive international match demands. 17 international male players (26.00 3.08 years, 181.47 6.7... Read More about Match Demands of Male International Lacrosse Players Competing Under the World Lacrosse Sixes Format in International Competition: Brief Report.

The Kneeling Isometric Plantar Flexor Test: Preliminary Reliability and Feasibility in Professional Youth Football (2023)
Journal Article
McMahon, J. J., Ripley, N. J., Comfort, P., Robles-Palazón, F. J., Fahey, J. T., Badby, A. J., & Bramah, C. (2023). The Kneeling Isometric Plantar Flexor Test: Preliminary Reliability and Feasibility in Professional Youth Football. Journal of Functional Morphology and Kinesiology, 8(4), 164. https://doi.org/10.3390/jfmk8040164

Calf injuries are common in professional football; thus, the establishment of reliable and time-efficient methods of measuring the peak force capabilities of the plantar flexors with equipment that is accessible to football practitioners is valuable.... Read More about The Kneeling Isometric Plantar Flexor Test: Preliminary Reliability and Feasibility in Professional Youth Football.

Rapid force generation during unilateral isometric hamstring assessment: reliability and relationship to maximal force. (2023)
Journal Article
Ripley, N., Fahey, J., Cuthbert, M., McMahon, J., & Comfort, P. (2023). Rapid force generation during unilateral isometric hamstring assessment: reliability and relationship to maximal force. Sports Biomechanics, 1-12. https://doi.org/10.1080/14763141.2023.2276316

Limited research has reported the reliability of rapid force generation characteristics during isometric assessments of the hamstrings. Therefore, the purpose of the present study was to determine the between-session reliability of rapid force genera... Read More about Rapid force generation during unilateral isometric hamstring assessment: reliability and relationship to maximal force..

Letter to the Editor: “Acute Effects of a Fatiguing Protocol on Peak Force and Rate of Force Development of the Hamstring Muscles in Soccer Players” (2023)
Journal Article

Injuries in International Men’s Sixes Lacrosse: Injury Surveillance of the British Lacrosse Men’s National Team During a 9-Month Training Cycle Leading up to and Including The World Games 2022 (2023)
Journal Article
Collier, M., Ripley, N., Wenham, T., & O'neill, S. (2023). Injuries in International Men’s Sixes Lacrosse: Injury Surveillance of the British Lacrosse Men’s National Team During a 9-Month Training Cycle Leading up to and Including The World Games 2022. Journal of Orthopaedic & Sports Physical Therapy, 1(1), 63-69. https://doi.org/10.2519/josptopen.2023.0008

OBJECTIVE: To describe the injury epidemiology of a men’s national Sixes lacrosse team across training and competition. DESIGN: Prospective observation study. METHODS: This study prospectively observed in- juries that occurred within a training and c... Read More about Injuries in International Men’s Sixes Lacrosse: Injury Surveillance of the British Lacrosse Men’s National Team During a 9-Month Training Cycle Leading up to and Including The World Games 2022.