**Table 5.** Mechanistic analysis of the effect of the 15 m start time, mean total turn time (5 m before to 10 m after wall contact), mean free-swimming velocity, mean stroke rate, and mean distance per stroke on Individual Medley (IM) race time as the dependent variable using stepwise regression analysis with all participants of each event.

| Regression model |
P-value |
Regression coefficients |

Entries |
R square |
F-value |
Beta |
T-value |
P-value |

**Males** |
**100 m IM** |
Turn time [s] |
70 |
0.98 |
F_{(3 | 66)} = 1013 |
P < 0.001 |
0.53 |
T = 11 |
P < 0.001 |

Swim velocity [m/s] |
-0.34 |
T = -12 |
P < 0.001 |

Start time [s] |
0.19 |
T = 5 |
P < 0.001 |

**200 m IM** |
Turn time [s] |
59 |
0.99 |
F_{(3 | 55)} = 3055 |
P < 0.001 |
0.65 |
T = 32 |
P < 0.001 |

Swim velocity [m/s] |
-0.36 |
T = -21 |
P < 0.001 |

Start time [s] |
0.04 |
T = 3 |
P = 0.009 |

**400 m IM** |
Turn time [s] |
26 |
0.97 |
F_{(2 | 23)} = 313 |
P < 0.001 |
0.78 |
T = 16 |
P < 0.001 |

Swim velocity [m/s] |
-0.29 |
T = -6 |
P < 0.001 |

**Females** |
**100 m IM** |
Turn time [s] |
73 |
0.99 |
F_{(3 | 69)} = 3181 |
P < 0.001 |
0.63 |
T = 26 |
P < 0.001 |

Swim velocity [m/s] |
-0.28 |
T = -15 |
P < 0.001 |

Start time [s] |
0.14 |
T = 7 |
P < 0.001 |

**200 m IM** |
Turn time [s] |
46 |
0.99 |
F_{(3 | 42)} = 1858 |
P < 0.001 |
0.57 |
T = 19 |
P < 0.001 |

Swim velocity [m/s] |
-0.42 |
T = -18 |
P < 0.001 |

Start time [s] |
0.06 |
T = 3 |
P = 0.006 |

**400 m IM** |
Turn time [s] |
36 |
1.00 |
F_{(2 | 33)} = 3791 |
P < 0.001 |
0.58 |
T = 27 |
P < 0.001 |

Swim velocity [m/s] |
-0.46 |
T = -21 |
P < 0.001 |