Use Heart Rate to Control Training
Heart rate works best as a guardrail for steady work, not as a command for every second of every run.
Apply heart rate where it improves decisions and ignore it where it lags.
Control easy and steady running
Use a broad working range to prevent easy days from becoming moderate by accident. Slow down or walk when effort and heart rate keep rising.
Allow for response delay
Heart rate takes time to respond when pace changes. Short intervals should be guided primarily by the session plan, pace, and effort rather than chasing a delayed number.
Distribute intensity across the week
Most recreational runners benefit from keeping most running controlled and a smaller share deliberately hard. Ideas such as 80/20 or MAF can guide restraint, but they are not universal prescriptions.
Put it into practice
- Set a broad cap for easy days.
- Use pace and effort for short intervals instead of chasing delayed heart rate.
- Review the weekly balance of controlled and hard running.
Heart rate changes at least one useful decision without making you micromanage every minute.
A low heart rate does not guarantee low strain when illness, heat, dehydration, medication, or accumulated fatigue changes the response.