Investigating the Acute Effect of Different Training Protocols on Heart Rate Variability.

Heart Rate Linear mixed model analysis demonstrated a highly significant main effect of Timepoint on heart rate (F(3, 84) = 4973.270, p < 0.001, η 2 = 0.994), indicating a substantial increase in HR during the TRAINING phase, followed by a return toward baseline values at POST 24 h ( Figure 6 ).

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