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Characteristics of included studies (n = 74).
| Study Types | n |
|---|---|
| Prospective | 53 |
| Retrospective | 13 |
| Cross-Sectional | 8 |
| Playing Levels | |
| Professional | 40 |
| Adult/Amateur Competitive | 7 |
| Adult Recreational | 1 |
| Collegiate | 2 |
| Youth | 8 |
| Multi-Level | 7 |
| Unspecified | 9 |
| Gender | |
| Males | 57 |
| Females | 8 |
| Both | 8 |
| Unspecified | 1 |
