Changes in single-leg hop distance (n = 15).

Changes in single-leg hop distance (n = 15).</p

Reliability results from the maximal eccentric hamstring strength measurements for both legs via handheld dynamometry.

A: Scatter plots with a regression line for the dominant leg reliability measurements, B: Radar chart for the dominant leg reliability measurements shows agreements between measurements for each participant from 1 to 17, C: Scatter plots with a regression line for the non-dominant leg reliability measurements, D: Radar chart for the non-dominant leg reliability measurements shows agreements between measurements for each participant from 1 to 17. Abbreviations: CI, confidence interval; ICC: Intraclass correlation coefficient; N, Newton; n, sample size.</p

The biceps femoris long head fascicle length measurement and digitisation.

A: 2-dimensional ultrasound images were taken from the mid-thigh for both legs. B: Digitisation for the biceps femoris long head fascicle length according to the manual linear extrapolation method. The individual pictured in Fig 2 has provided written informed consent (as outlined in PLOS consent form) to publish their image alongside the manuscript.</p

Raw data.

(PDF)</p

Alterations in the SLHB performance (n = 15).

Alterations in the SLHB performance (n = 15).</p

Alterations in the biceps femoris long head fascicle length (n = 15).

Alterations in the biceps femoris long head fascicle length (n = 15).</p

Hamstrings’ eccentric maximum strength measurements by handheld dynamometry.

The hip joints were neutral (0 degrees of hip extension) during the measurements. A: The starting point of the measurement was when the knee was approximately 60⁰ flexed and when the handheld dynamometer was on the two centimetres proximal to the malleolus of the ankle. B: The ending position of the hamstrings’ maximum eccentric strength measurement. The individual pictured in Fig 3 has provided written informed consent (as outlined in PLOS consent form) to publish their image alongside the manuscript.</p

Changes in the eccentric maximal hamstring strength were measured by handheld dynamometry (n = 15).

Changes in the eccentric maximal hamstring strength were measured by handheld dynamometry (n = 15).</p

Single Leg Hamstring Bridge (SLHB) test.

Participants were asked to perform movements by touching the ground by their bottom and reach 0⁰ of hip extension by lifting their bottom respectively and without resting with the help of a 60-cm high box. The other leg was in a vertical position as inactive and stationary to eliminate any momentums that might be provided by swinging the leg. Participants were advised to aim to perform as much as they could repeat the same movement until failure. The individual pictured in Fig 4 has provided written informed consent (as outlined in PLOS consent form) to publish their image alongside the manuscript.</p

Study flow diagram.

This diagram shows the actions taken in the first and second sessions of the study.</p