Summary
Studies on intermittent fasting and HRV show mixed results. Initial fasting periods may temporarily suppress HRV, but after adaptation (2-4 weeks), some individuals see improvements.
Methods
Studies of time-restricted eating and alternate-day fasting
Key Findings
- First 1-2 weeks often show HRV suppression
- After adaptation, some studies show HRV improvement
- Effects vary by fasting protocol and individual
- Weight loss component may drive HRV benefits
Limitations
Small studies, varying protocols, short durations
What This Means for You
If you start intermittent fasting, expect potential HRV drops initially. If HRV remains suppressed after 3-4 weeks, the fasting protocol may be too stressful for your current recovery capacity.
Source
Read the original paper in Nutrients ↗
Added to HRV Zone: 2025-01-09