Table 2.
Study characteristics of the reviewed literature.
| N | ||
|---|---|---|
| Athlete gender | Female | 1 |
| Male | 8 | |
| Mixed | 10 | |
| Not reported | 5 | |
| Athlete age | Child (3–5) | - |
| Youth (6–11) | - | |
| Adolescent (12–18) | 5 | |
| Adult (19+) | 4 | |
| Mixed youth and adolescent | - | |
| Mixed adolescent and adult | 3 | |
| Mixed youth, adolescent and adult | 2 | |
| Not reported | 10 | |
| Sports | Boxing | 1 |
| Football | 7 | |
| Ice hockey | 1 | |
| Soccer | 1 | |
| Mixed | 11 | |
| Not reported | 3 | |
| Region sample is recruited from | North America | 22 |
| Europe | 1 | |
| Not reported | 1 | |
| Sample size | <20 | - |
| 20–50 | 10 | |
| 51–100 | 5 | |
| 101–200 | 2 | |
| 201–500 | 1 | |
| >501 | 2 | |
| Not reported | 4 |