Table 3.
Differences, associations, and heteroscedasticity of the errors between the actual and predicted 1RMs during the bent-over-row exercise.
| Group | 1RM Prediction Method | Raw Diff (kg) | p-Value | ES |
r
(Pearson) |
r
(heteroscedasticity) |
|---|---|---|---|---|---|---|
| Whole | Multiple-point (n = 35) | 6.4 ± 14.1 | 0.011 * | 0.34 | 0.77 | 0.50 ^ |
| Distant two-point (n = 35) | 10.3 ± 14.5 | <0.001 * | 0.56 | 0.74 | 0.44 ^ | |
| Load-load (n = 30) | −2.4 ± 20.8 | 0.403 | −0.14 | 0.72 | 0.68 ^ | |
| High-load (n = 33) | 10.1 ± 17.0 | 0.002 * | 0.50 | 0.77 | 0.66 ^ | |
| Young | Multiple-point (n = 19) | 8.3 ± 16.9 | 0.046 * | 0.43 | 0.71 | 0.56 ^ |
| Distant two-point (n = 19) | 10.4 ± 16.6 | 0.014 * | 0.54 | 0.71 | 0.54 ^ | |
| Load-load (n = 18) | 0.3 ± 23.6 | 0.964 | 0.01 | 0.68 | 0.74 ^ | |
| High-load (n = 19) | 10.9 ± 19.1 | 0.023 * | 0.52 | 0.72 | 0.66 ^ | |
| Middle-aged | Multiple-point (n = 16) | 4.2 ± 9.9 | 0.110 | 0.29 | 0.78 | 0.31 |
| Distant two-point (n = 16) | 10.3 ±12.1 | 0.004 * | 0.69 | 0.70 | 0.35 ^ | |
| Load-load (n = 12) | −8.4 ± 15.2 | 0.080 | −0.56 | 0.55 | 0.47 ^ | |
| High-load (n = 14) | 9.0 ± 14.4 | 0.035 * | 0.50 | 0.81 | 0.71 ^ |
Data are mean ± standard deviation. Raw diff, Raw differences; ES, Cohen’s d effect size ([Predicted 1RM—Actual 1RM]/SD both); rPearson, Pearson’s correlation coefficient; rheteroscedasticity, heteroscedasticity of the errors; *, p is < 0.05; ^ denotes hetereoscedasticity (i.e., r > 0.32).