05-15-2020 11:25
05-15-2020 11:25
Why is my calories burned so different than my friend’ doing the same activity together? We are similar sized, just different ages...
05-15-2020 11:37
05-15-2020 11:37
Could it be one is in much better shape so isn't working as hard?
05-16-2020 20:37
05-16-2020 20:37