Participant characteristics (n=57)
| Participant characteristics | |
| Age (in years; mean±SD) | 42±10.08 |
| Gender (male; %) | 91 |
| Country (N) | |
| England | 30 |
| The Netherlands | 6 |
| Germany | 5 |
| Belgium | 4 |
| Ireland | 3 |
| Portugal | 3 |
| Other | 9 |
| Team level of play (%) | |
| Highest national league | 41 |
| Second highest national league | 14 |
| Youth/academy | 5 |
| International | 40 |