Heart Rate is typically used as a measure of exercise intensity.

Or use the "talk test" to gauge your exercise intensity.

Doctors urging heart patients to exercise wanted a way to gauge exercise intensity.

This is often used to gauge exercise intensity (first used in 1957 by Karvonen).

Experts recommend that you never increase your exercise intensity by more than 10% per week.

At this exercise intensity, you will stop sooner rather than later because the muscles will fail to function.

It may also help to reduce exercise intensity and instead work out more often or for longer sessions.

Rest frequently, and build up your exercise intensity a little bit at a time.

Increased exercise intensity has been shown to hinder the "distraction effect" caused by listening to music while exercising.

Given the wide range of exercise intensities, there will probably not be a temperature that suits everyone.