I Tracked My Heart Rate Every Day for 90 Days at 63. Here's What I Found. Boundless Journal — Joint & Heart Health https://boundlesssociety.com/blog/tracked-heart-rate-90-days Published: 2026-06-16 I started wearing a Garmin at 63 mostly to count steps. Ninety days later, my resting heart rate had dropped from 72 to 43 bpm. Here are the four things I changed, in the order they worked. THE BASELINE Resting heart rate on day 1 (measured first thing in morning before rising): 72 bpm. For a 63-year-old, 72 is in the average-to-high range. Not alarming, but not the sign of a well-conditioned heart. By day 90: 43 bpm. THE FOUR CHANGES CHANGE 1 — Days 1-14: Walking 30 minutes every morning Replaced the habit of going directly from bed to laptop with a 30-minute walk before breakfast. No pace or heart rate targets. Just consistent movement. Why it worked: Aerobic exercise increases cardiac stroke volume over time — the heart learns to push more blood per beat, so needs fewer beats per minute at rest. The 30-minute daily dose is the minimum effective amount from most clinical trials. CHANGE 2 — Day 14: Alcohol from 4-5 drinks/week to 0-1 The most resisted change. The data disagreed emphatically with the resistance. Why it worked: Alcohol elevates resting heart rate and suppresses heart rate variability through acetaldehyde's effect on the autonomic nervous system. My resting heart rate dropped approximately 4 bpm in the week following the change. It was the most visually obvious inflection point in the entire 90-day chart. CHANGE 3 — Day 42: Stationary cycling twice a week 25 minutes at moderate intensity (conversational pace with mild breathlessness). Tuesday and Thursday mornings. Why it worked: Two exercise modalities rather than one improves cardiac adaptation more than a single type at matched total time. Adding cycling produced a second distinct drop in resting HR around days 42-55, after the initial plateau from walking alone. CHANGE 4 — Day 70: Fixed sleep and wake times, dark and cool room Consistent 10:30pm lights-out, 6:30am wake regardless of day. Bedroom temperature: 17°C. Phone removed from bedroom. Why it worked: Sleep quality is the most underappreciated driver of resting heart rate. Poor sleep elevates cortisol, keeping the sympathetic nervous system activated. My HRV improved more dramatically from the sleep change than from any of the exercise changes. THE UNEXPECTED FINDING: HEART RATE VARIABILITY (HRV) HRV day 1: 28ms. HRV day 90: 52ms. Higher HRV generally indicates a more responsive autonomic nervous system, better recovery, and lower cardiovascular risk. The correlation between how I felt in the morning and what the watch reported was striking — on high-HRV mornings the walk felt easy; on low-HRV days (almost always after poor sleep or alcohol) I walked more gently. WHAT I WOULD TELL ANYONE STARTING THIS A single number means almost nothing. 90 days of numbers reveals your actual cardiovascular baseline, your response to what you change, and what your body has been trying to tell you. The alcohol finding alone was worth the cost of the watch. I had been drinking a modest amount and considering it inconsequential. The data suggested otherwise. RESTING HEART RATE REFERENCE FOR ADULTS OVER 60 Excellent: 45-55 bpm (athletes or highly active) Good: 55-65 bpm Average: 65-75 bpm High-normal: 75-80 bpm (warrants review if sedentary) Elevated: 80+ bpm (warrants conversation with doctor) FREQUENTLY ASKED QUESTIONS Q: What is a good resting heart rate for a 63-year-old? A: Between 55 and 75 bpm is generally considered healthy. Athletes may see 45-55 bpm. The more meaningful number is the trend — a resting heart rate declining over weeks and months indicates improving cardiovascular fitness. Q: What does heart rate variability (HRV) tell you about health? A: Higher HRV generally indicates a more responsive autonomic nervous system and better cardiovascular health. Low HRV is associated with stress, poor sleep, overtraining, and cardiovascular risk. In adults over 60, HRV responds to better sleep, lower stress, regular moderate exercise, and reduced alcohol intake. Q: How long does it take to improve resting heart rate with exercise? A: Meaningful resting heart rate reduction is typically visible within 4-8 weeks of consistent aerobic exercise in previously lightly active adults. The standard dose is 150 minutes of moderate-intensity aerobic exercise per week. The most reliable signal is a 3-5 bpm reduction over 8-12 weeks. --- Boundless Society | boundlesssociety.com Personalised longevity plans for adults 55 and older.