Table 5. Mean (95% confidence intervals) and range of correlation coefficients across participants between internal and external training intensity measures.
Scatterplots of the raw data for each participant is presented in S1 Fig.
| “Training Intensity” (kg) | “Intensity Index” (kg) | Work rate (kg·min-1) | Work rate (J·min-1) | |
|---|---|---|---|---|
| (ml·kg·min-1) | 0.33 (0.17, 0.46) range: -0.11, 0.71 | 0.33 (0.17, 0.46) range: -0.11, 0.71 | 0.84 (0.79, 0.88) range: 0.65, 0.95 | 0.96 (0.95, 0.97) range: 0.84, 0.98 |
| Heart rate (beats·min-1) | 0.20 (-0.04, 0.42) range: -0.26, 0.64 | 0.2 (-0.04, 0.42) range: -0.26, 0.64 | 0.91 (0.83, 0.96) range: 0.72, 0.99 | 0.89 (0.84, 0.93) range: 0.77, 0.95 |
| Blood lactate concentration (mmol·L-1) | -0.42 (-0.55, -0.28) range: -0.75, -0.09 | -0.42 (-0.55, -0.28) range: -0.75, -0.09 | 0.87 (0.82, 0.90) range: 0.64, 0.94 | 0.67 (0.62, 0.72) range: 0.53, 0.81 |
| Set RPE (AU) | -0.03 (-0.20, 0.15) range: -0.70, 0.43 | -0.03 (-0.20, 0.15) range: -0.70, 0.43 | 0.37 (0.13, 0.56) range: -0.53, 0.89 | 0.57 (0.20, 0.79) range: -0.49, 0.98 |
TI metric = training-intensity metric, II metric = intensity-index metric, = rate of oxygen consumption, RPE = rating of perceived exertion. Correlation coefficients calculated as Pearson’s except for those involving set RPE scores which are Spearman’s rho. Individual correlation coefficients were transformed prior to calculating means and confidence intervals using Fischer Z transformations and then back transformed for summary statistics presented in this table.
NOTE: Intensity Index is calculated as Training Index relative to body mass and so both exhibit identical correlations with internal intensity metrics. Correlations were calculated individually for each participant to avoid violating assumptions of independence.