Table 2

Perceived modifiable risk factors for hamstring injuries, divided between intrinsic factors (players) and extrinsic factors (coaching, team, club)

Total group (n=15)
Weighted average
Group LOW (n=7)
Weighted average
Group HIGH (n=8) Weighted average
Intrinsic risk factors (players)
Residual weakness after previous hamstring injury3.53.63.5
Strength asymmetry of hamstrings (R/L ratio, Q/H ratio)
Lack of eccentric strength of the hamstrings3.23.33.1
Poor core stability
(lumbopelvic control)
Poor coordination2.82.92.8
Player wellness
(sleep patterns, relationships, etc)
Poor flexibility2.42.12.6
Poor nutrition2.12.32.0
Extrinsic risk factors (coaching, team, club)
Lack of communication between medical staff and coaching staff3.73.63.8
Lack of regular exposure to high-speed football during training3.63.83.5
Load on players3.53.13.8
Lack of in-season recovery strategies3.53.63.4
Lack of interest in prevention strategies in the team or club3.43.33.5
Playing matches 2–3 times a week3.33.43.3
Lack of regular exposure to strength training (eccentric/isometric/concentric)
Training/exercise surveillance by coaching staff3.23.13.3
Off-season loading/recovery2.72.43.0
No and expertise of the medical staff2.72.33.1
Style of coach leadership2.72.13.3
Medical budget1.91.42.3