Alterations in the SLHB performance (n = 15).

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

Raw data.

(PDF)</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

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

Changes in single-leg hop distance (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

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

Reliability results of the biceps femoris long head fascicle length measurements for both legs.

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 15, 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 15. Abbreviations: CI, confidence interval; FL, fascicle length; ICC: Intraclass correlation coefficient; n, sample size.</p

Fig 5 -

Box & Whisker plots show the mean percentage of maximal heart rate of each fifteen minutes across ninety minutes of the TSAFT90football simulation. The first box with blue colour represents the mean percentage of maximal heart rate of 0–15 minutes, the second box with the orange colour indicates the mean percentage of maximal heart rate of 15–30 minutes, the third box with grey colour refers to the mean percentage of maximal heart rate of the 30–45 minutes, the fourth box with yellow colour points out the mean percentage of maximal heart rate of the 45–60 minutes, the fifth box with navy blue colour demonstrates the mean percentage of maximal heart rate of the 60–75 minutes, and the sixth box with green colour shows the mean percentage of maximal heart rate of the 75–90 minutes of the TSAFT90 football simulation. Abbreviations: a, significantly higher than 0–15 minutes (p = 0.021); b, significantly higher than 15–30 minutes (p = 0.014); c, significantly higher than 30–45 minutes (p d, significantly higher than 45–60 minutes (p = 0.001); e, significantly higher than 60–75 minutes (p = 0.013). Abbreviations: n, sample size.</p