Differences in WT and RT runners for physiological variables assessed during the high-intensity interval sequence
| WT | RT | Effect size | Qualitative threshold | |
|---|---|---|---|---|
| VO24th minute | 66.0±2.6 | 48.3±3.5 | 2.92±0.80 | Very large increase |
| EE (kJkg) | 38.1±1.92 | 28.6±1.88 | 2.71±0.84 | Very large increase |
| RPE | 16.2±0.57 | 16.2±0.66 | 0.01±0.78 | Unclear |
| RER | 0.88±0.01 | 0.95±0.01 | −2.69±0.80 | Very large decrease |
| Lactate (mmol/L) | 7.6±1.6 | 6.5±1.7 | 0.43±0.81 | Unclear |
Data are presented as mean and 90% (CL). Effect size is shown as 90% CL WT to RT.
RPE, RER and blood lactate concentrations were measured during the work periods.
CL, confidence limits; EE, energy expenditure during work and rest periods; RER, respiratory exchange ratio; RPE, rating of perceived exertion; RT, recreationally trained; VO24th minute, VO2 (mL/kg/min) during the fourth minute of each work period; WT, well-trained.