Physiological values in tennis players corresponding to the maximum work load in tennis field (FT) and treadmill (TT) tests (n = 9)
| Variable | FT | TT | p Value |
|---|---|---|---|
| *p = 0.058. | |||
| Values are mean (SD). Bf, breathing frequency; HR, heart rate; RER, respiratory exchange ratio; VCO2, carbon dioxide production; VE, minute ventilation; VO2, oxygen uptake; Vt, tidal volume. | |||
| VO2 (ml/min/kg) | 63.8 (5.7) | 58.9 (5.3) | <0.05 |
| VCO2 (ml/min/kg) | 74.5 (7.5) | 58.7 (5.5) | <0.001 |
| RER | 1.18 (0.07) | 1.03 (0.04) | <0.001 |
| VE (l/min) | 117.1 (17.4) | 115.1 (14.5) | NS |
| HR (bpm) | 190.0 (5.2) | 194.1 (7.7) | NS |
| Bf (breaths/min) | 62.5 (8.7) | 67.4 (11.4) | NS |
| Vt (l) | 2.24 (0.6) | 2.07 (0.5) | NS* |