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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.

Early Versus Late Rapid Force Production During Single Joint Isometric Hamstring Assessment Using Force Plates (2024)
Journal Article
Ripley, N., Barber, R., Fahey, J., & Comfort, P. (in press). Early Versus Late Rapid Force Production During Single Joint Isometric Hamstring Assessment Using Force Plates. Journal of Strength and Conditioning Research,

The aim of this study was to assess differences in time-matched early versus late rapid force (RF) development in female soccer players in the 90-90 isometric hamstring assessment. Twenty-one elite female soccer players (age: 20.7 ± 4.7 years; height... Read More about Early Versus Late Rapid Force Production During Single Joint Isometric Hamstring Assessment Using Force Plates.

Effect of Sampling Frequency on a Unilateral Isometric Hamstring Strength Assessment Using Force Plates (2024)
Journal Article
Ripley, N., McMahon, J., & Comfort, P. (2024). Effect of Sampling Frequency on a Unilateral Isometric Hamstring Strength Assessment Using Force Plates. #Journal not on list, https://doi.org/10.1007/s42978-024-00277-w

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
Ripley, N., Wenham, T., & Collier, M. (2024). Lacrosse: Match Demands, Physical Performance, and Injury Surveillance a Scoping Review. #Journal not on list, https://doi.org/10.1007/s12662-023-00937-z

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
Ripley, N., Collier, M., Wenham, T., & Quinn, M. (in press). Match Demands of Male International Lacrosse Players Competing Under the World Lacrosse Sixes Format in International Competition: Brief Report. #Journal not on list,

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... 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..

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.

Effect of additional Nordic hamstring exercise or sprint training on the modifiable risk factors of hamstring strain injuries and performance (2023)
Journal Article
Ripley, N., Cuthbert, M., Comfort, P., & McMahon, J. (2023). Effect of additional Nordic hamstring exercise or sprint training on the modifiable risk factors of hamstring strain injuries and performance. PLoS ONE, 18(3), https://doi.org/10.1371/journal.pone.0281966

The Nordic hamstring exercise (NHE) has commonly been investigated in isolation, however, within practice multiple modalities are commonly incorporated. However, the NHE has a low level of compliance within sport, with sprinting being potentially bei... Read More about Effect of additional Nordic hamstring exercise or sprint training on the modifiable risk factors of hamstring strain injuries and performance.

Force plate-derived countermovement jump normative data and benchmarks for professional Rugby League players (2022)
Journal Article
McMahon, J., Ripley, N., & Comfort, P. (2022). Force plate-derived countermovement jump normative data and benchmarks for professional Rugby League players. Sensors, 22(22), 8669. https://doi.org/10.3390/s22228669

The countermovement jump (CMJ) is an important test in rugby league (RL), and the force plate is the recommended assessment device, as it permits the calculation of several variables that explain jump strategy, alongside jump height. The purpose of t... Read More about Force plate-derived countermovement jump normative data and benchmarks for professional Rugby League players.

Comparison between methods to estimate bicep femoris fascicle length from three estimation equations using a 10 cm ultrasound probe (2022)
Journal Article
Ripley, N., Comfort, P., & McMahon, J. (2022). Comparison between methods to estimate bicep femoris fascicle length from three estimation equations using a 10 cm ultrasound probe. Measurement in Physical Education and Exercise Science, 27(1), 43-50. https://doi.org/10.1080/1091367X.2022.2063689

The aim of the present study was to determine the reliability and differences between three fascicle length (FL) estimation methods when utilizing a 10-cm ultrasound (US) probe. Thirteen males (24.1 ± 3.8 years, 79.3 ± 14 kg, 179 ± 6.6 cm) participat... Read More about Comparison between methods to estimate bicep femoris fascicle length from three estimation equations using a 10 cm ultrasound probe.

The effect of exercise compliance on risk reduction for hamstring strain injury : a systematic review and meta-analyses (2021)
Journal Article
Ripley, N., Cuthbert, M., Ross, S., Comfort, P., & McMahon, J. (2021). The effect of exercise compliance on risk reduction for hamstring strain injury : a systematic review and meta-analyses. International Journal of Environmental Research and Public Health, 18(21), e11260. https://doi.org/10.3390/ijerph182111260

Eccentric strength training can reduce the risk of hamstring strain injury (HSI) occurrence; however, its implementation can be impacted by athlete compliance and prescription. The aim of this review was to investigate the effects of intervention com... Read More about The effect of exercise compliance on risk reduction for hamstring strain injury : a systematic review and meta-analyses.

Effects of variations in resistance training frequency on strength development in well-trained populations and implications for in-season athlete training : a systematic review and meta-analysis (2021)
Journal Article
Cuthbert, M., Haff, G., Arent, S., Ripley, N., McMahon, J., Evans, M., & Comfort, P. (2021). Effects of variations in resistance training frequency on strength development in well-trained populations and implications for in-season athlete training : a systematic review and meta-analysis. Sports Medicine, 51(9), 1967-1982. https://doi.org/10.1007/s40279-021-01460-7

In-season competition and tournaments for team sports can be both long and congested, with some sports competing up to three times per week. During these periods of time, athletes need to prepare technically, tactically and physically for the next fi... Read More about Effects of variations in resistance training frequency on strength development in well-trained populations and implications for in-season athlete training : a systematic review and meta-analysis.

Electromyographical Differences Between the Hyperextension and Reverse-Hyperextension (2021)
Journal Article
Cuthbert, M., Ripley, N. J., Suchomel, T. J., Alejo, R., McMahon, J. J., & Comfort, P. (2021). Electromyographical Differences Between the Hyperextension and Reverse-Hyperextension. Journal of Strength and Conditioning Research, 35(6), 1477-1483. https://doi.org/10.1519/jsc.0000000000004049

The aims of this study were to compare muscle activation of the erector spinae (ES), gluteus maximus (GMax), and biceps femoris (BF) during the hyperextension (HE) and reverse-HE (RHE) exercises. Ten subjects (age, 23 ± 4 years; height, 175.9 ± 6.9 c... Read More about Electromyographical Differences Between the Hyperextension and Reverse-Hyperextension.

Unilateral vs. bilateral hamstring strength assessments : comparing reliability and inter-limb asymmetries in female soccer players (2021)
Journal Article
Cuthbert, M., Comfort, P., Ripley, N., McMahon, J., Evans, M., & Bishop, C. (2021). Unilateral vs. bilateral hamstring strength assessments : comparing reliability and inter-limb asymmetries in female soccer players. Journal of Sports Sciences, 39(13), 1481-1488. https://doi.org/10.1080/02640414.2021.1880180

The aims in the present study were to assess reliability for two unilateral and two bilateral field-based hamstring assessments and compare magnitude, direction and agreement of inter-limb asymmetry between tests and sessions. Twenty-nine female socc... Read More about Unilateral vs. bilateral hamstring strength assessments : comparing reliability and inter-limb asymmetries in female soccer players.

Modifiable risk factors of hamstring strain injury : assessment, performance and training (2021)
Thesis
Ripley, N. Modifiable risk factors of hamstring strain injury : assessment, performance and training. (Thesis). University of Salford

Hamstring strain injuries (HSIs), which are typically sustained during high velocity movements (i.e., sprinting or high velocity running), commonly involves the bicep femoris long head (BFLH). To date, the Nordic hamstring exercise (NHE) is the most... Read More about Modifiable risk factors of hamstring strain injury : assessment, performance and training.

Vertical jump testing in rugby league: a rationale for calculating take-off momentum (2020)
Journal Article
McMahon, J., Lake, J., Ripley, N., & Comfort, P. (2020). Vertical jump testing in rugby league: a rationale for calculating take-off momentum. Journal of Applied Biomechanics, 36(6), 370-374. https://doi.org/10.1123/JAB.2020-0100

The purpose of this study was to determine the usefulness of calculating jump take-off momentum in rugby league (RL) by exploring its relationship with sprint momentum, due to the latter being an important attribute of this sport. Twenty-five male RL... Read More about Vertical jump testing in rugby league: a rationale for calculating take-off momentum.

Reply to: "Comment on : the effect of Nordic hamstring exercise intervention volume on eccentric strength and muscle architecture adaptations : a systematic review and meta-analyses" (2019)
Journal Article
Cuthbert, M., Ripley, N., McMahon, J., Evans, M., Haff, G., & Comfort, P. (2020). Reply to: "Comment on : the effect of Nordic hamstring exercise intervention volume on eccentric strength and muscle architecture adaptations : a systematic review and meta-analyses". Sports Medicine, 50, 223-225. https://doi.org/10.1007/s40279-019-01245-z

Letter to the Editor