Table 2. HR and pace results, mean ± SD
MWRR½ MarathonPikes PeakMarathonMWRR altitude subgroup
HR (bpm)168.9 ± 8.3171.1 ± 7.7164.1 ± 9.8166.5 ± 9.3
HR % estimated max91.8 ± 4.792.4 ± 4.289.2 ± 4.790.2 ± 5.1
Second half % slower11.5 ± 4.8a4.3 ± 8.451.2 ± 8.8b5.7 ± 5.415.4 ± 1.0c
HR change bpm0.4 ± 4.33.7 ± 5.4d−4.4 ± 9.9e1.8 ± 6.1d
Change % est. HRmax0.2 ± 2.32.0 ± 2.9d−2.4 ± 5.4e1.0 ± 3.3
  • a MWRR slowed more than ½ marathoners (P < 0.01) and marathoners (P = 0.01).

  • b PP runners slowed more than all other groups (P < 0.0001).

  • c MWRR altitude runners slowed more than ½ marathoners and marathoners (P < 0.05).

  • d ½ Marathoners' (P < 0.01) and marathoners' (P < 0.05) HR increased in the 2nd half.

  • e PP runners' HR decrease was significantly different from the marathoners' (P < 0.01) and ½ marathoners' (P = 0.001) HR increase.