Table 5 Nocturnal HRV dose-response contrasts at different levels of exercise timing (habitual) and strain

From: Dose-response relationship between evening exercise and sleep

 

Exercise timing relative to habitual sleep onset

Contrast

−10 h

−8 h

−6 h

−4 h

−2 h

0

+2h

Light – None

−1.56 (0.09)

−1.54 (0.04)

−1.18 (0.04)

−0.84 (0.04)

−1.18 (0.05)

−4.55 (0.14)

−15.25 (0.71)

Mod. – Light

−1.20 (0.13)

−1.14 (0.06)

−1.26 (0.06)

−1.64 (0.05)

−2.63 (0.08)

−5.32 (0.22)

−9.08 (1.03)

High – Mod.

0.07 (0.17)

−0.96 (0.08)

−1.36 (0.08)

−1.66 (0.07)

−2.60 (0.11)

−2.44 (0.28)

0.98 (1.17)

Maximal – High

−1.84 (0.31)

−1.95 (0.15)

−1.96 (0.17)

−2.77 (0.20)

−3.07 (0.29)

−4.26 (0.63)

−6.56 (2.03)

  1. Values represent nocturnal HRV difference (RMSSD). Bolded values represent a significant change in the outcome variable from the previous strain level (p < 0.005). Standard errors are in parentheses. Statistical test used was generalized additive mixed models and contrast of estimated marginal means. Multivariate t-distribution adjustment method was used to adjust for multiple comparisons. Two-sided tests were used.