Table 3.
Differences between serve and return games during one-hour simulated tennis matches
| Serve Games | Return Games | ||||||
|---|---|---|---|---|---|---|---|
| Physiological Variables | Mean±SD | CV (%) | Mean±SD | CV (%) | MD | %95CI | ES |
| VO2max (ml·min-1·kg-1) | 27.6±2.8* | 10.33 | 25.6±2.1 | 8.40 | 2.0 | 2.01, 2.17 | 0.382 |
| HR (beat·min-1) | 146.6±9.4* | 6.41 | 138.8±8.1 | 5.83 | 7.8 | 7.51, 8.07 | 0.426 |
| %HRmax (%) | 74.9±1.7* | 2.27 | 71.1±1.8 | 2.53 | 3.8 | 3.61, 3.96 | 0.735 |
| RPE nses | 13.5±1.8* | 13.48 | 12.0±2.1 | 17.66 | 1.5 | 0.82, 1.43 | 0.359 |
| respoEE (kcal·h-1) | 581.4±24.4* | 4.19 | 555.5±23.0 | 4.14 | 25.9 | 20.33, 31.46 | 0.578 |
| VE (L·min-1) | 69.5±15.8* | 22.41 | 65.0±14.5 | 22.44 | 4.5 | 4.04, 5.00 | 0.148 |
| RER (ratio) | 0.99±0.09* | 9.09 | 0.98±0.08 | 8.16 | 0.0 | 0.00, 0.01 | 0.058 |
| RF(number·min-1) | 40.7±9.4* | 23.20 | 38.7±7.5 | 19.34 | 2.0 | 1.79, 2.34 | 0.120 |
VO2= oxygen uptake; HR = mean heart rate; %HRmax= maximum heart rate; RPE = rating of perceived exertion; EE = energy expenditure; VE = pulmonary ventilation; RER = respiratory gas exchange ratio; RF = respiration frequency. CV: Coefficient of variation; MD: Mean Difference; %95CI: %95 Confidence Interval (%95CI was estimated for the difference between two means); ES: Effect Size (Absolute value)
*
Significant difference from return games, p<0.05. Values are expressed as the mean±SD