Heart Rate Variability – Guided Training for Monitoring Training Quality in Recreational Athletes: A Narrative Review

Background: Managing training load in recreational athletes requires accounting for physical, lifestyle, and occupational stressors that influence recovery. Traditional fixed programs often overlook individual readiness. Heart rate variability (HRV), a non-invasive marker of autonomic balance and vagal tone, enables personalized monitoring. Aim: To review evidence on HRV-guided training and provide practical recommendations for recreational athletes. Materials and Methods: A narrative review was conducted using PubMed, Scopus, and Web of Science databases, focusing on studies published in the last 15 years. Inclusion criteria were studies on recreational athletes that compared HRV-guided adaptive training with traditional fixed-load programs. The analysis emphasized RMSSD and the coefficient of variation (CV) as primary indicators of autonomic function and recovery. Both short-term (daily/weekly) and long-term (multi-week) HRV-guided interventions were considered, including protocols for load adjustment based on individualized thresholds. Results: HRV-guided training improves aerobic capacity and endurance more efficiently than standard programs, even with fewer high-intensity sessions. It allows training during optimal readiness, prioritizes recovery when needed, reduces non-responders, and facilitates precise load regulation. Conclusions: Regular HRV monitoring with individualized interpretation of RMSSD and CV supports safe, personalized training. HRV-guided approaches optimize adaptation, manage fatigue, and minimize overtraining risk in recreational athletes.