Best evidence synthesis data for all major categories of outcome variables assessed in individuals with a prior hamstring strain injury not included in the meta-analysis.
| Consistency (%) | |||||||
|---|---|---|---|---|---|---|---|
| Variable | Testing method | No. of studies | Decrease | No change | Increase | Quality (mean±SD) | Level of evidence of difference |
| Concentric strength* | Seated isokinetic (240°/s) | 3 | 100 | 0 | 0 | 67±16 | Moderate |
| Eccentric strength | Seated isokinetic (30°/s) | 4 | 75 | 25 | 0 | 58±3 | Moderate |
| Eccentric strength | Seated isokinetic (120°/s) | 2 | 100 | 0 | 0 | 58±4 | Moderate |
| Isometric Strength† | Hip 0°; knee 90° | 1 | 100 | 0 | 0 | 90 | Moderate |
| Concentric strength | Seated isokinetic (270°/s) | 1 | 100 | 0 | 0 | 60 | Limited |
| Eccentric strength | Seated isokinetic (230°/s) | 1 | 100 | 0 | 0 | 60 | Limited |
| Eccentric strength | Seated isokinetic (300°/s) | 1 | 100 | 0 | 0 | 60 | Limited |
| Eccentric hamstring:hip flexor peak torque ratio | Seated/standing isokinetic (300°/s) | 1 | 100 | 0 | 0 | 60 | Limited |
| Eccentric angle of peak torque | Seated isokinetic (30°/s) | 1 | 0 | 0 | 100 | 55 | Limited |
| Flexibility‡ | Passive knee extension | 3 | 67 | 33 | 0 | 57±3 | Conflicting |
| Flexibility | Active straight leg raise | 2 | 50 | 50 | 0 | 50±14 | Conflicting |
Consistency refers to the percentage of studies showing a particular outcome.
Outcome variables that had no supporting evidence are not included in this table.
*One study67 showed deficit present at return to play and 6 months postinjury.
†Deficit present at initial evaluation and 7-day follow-up.
‡Deficit assessed post return to play.