Calculate Heart Rate Recovery metrics

Computes various metrics related to heart rate recovery

calculate_hrr(standing_hr, baseline_hr)

Arguments

standing_hr

Vector of heart rate values after standing

baseline_hr

Resting heart rate before standing

Value

List containing recovery metrics:

hrr_60s

Absolute recovery in 60 seconds

hrr_relative

Relative recovery percentage

orthostatic_rise

Initial HR increase