rtywonia
If you are doing HIIT, what should your max strain ne at the peak? Are there any guidelines?
https://support.fourthfrontier.com/article/strain-and-its-importance
You can also read more about Heart Strain by clicking on the info button on the dashboard next to the Heart Strain.
https://support.fourthfrontier.com/article/strain-and-its-importance
You can also read more about Heart Strain by clicking on the info button on the dashboard next to the Heart Strain.