Re:Get Running with Couch to 5K
by somethingreen on Tuesday January 17, 2023 @12:23PM
(#34415425)
Interval training is different, it's supposed to spike your heart rate for short(er) periods, so that makes sense. When people are talking about running easy or being able to have a conversation, they usually are talking about low to moderate intensity aerobic zone or "zone 2", which goes to 75-80% HRmax depending on who you're asking. Some would even explicitly recommend 120-130 bpm range.
The cardiac exercise research group in Norway have developed and tested an online maximum heart rate calculator.
https://www.ntnu.edu/cerg/hrmax
Check what that number is for you.
The interval training they recommend would be about 90% of maximum heart rate.
(For example, I'm in my early 60s and I'm supposed to push my heart rate into the range 150—165 bpm.)