Descriptive characteristics of 24 participants
| Air (n = 7) | Gel (n = 10) | Spring (n = 7) | |
| Height (m) | 1.73 (0.09) | 1.70 (0.11) | 1.68 (0.04) |
| Mass (kg) | 69.6 (12) | 70.9 (12.7) | 64.3 (18.5) |
| Age (years) | 25 (6.5) | 29.4 (7.8) | 28.1 (7.7) |
| Males | 5 | 5 | 4 |
| Females | 2 | 5 | 3 |
Height, mass and age values are expressed in mean (SD) (all p>0.05).