HR/LF

1. Fitness functional training increases HR/LF in humans (at 2nd and 3rd minutes compared to CG and EG) (β = 60.48 to 205.31, p < 0.01 to 0.05).

   “FFG also showed higher HR/LF activity than CG an EG at the 2nd and 3rd minutes of recovery (β = 60.48 to 205.31, p < 0.01 to 0.05)”

   Human trialat 2nd and 3rd minutes compared to CG and EGmales

   Delayed heart rate recovery and its variability in fitness functional training compared to endurance athletes: a cross-sectional analysis

   PeerJ·Jan 5, 2026

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