The 2nd and 3rd one are both correct. I don’t know if it’s multiple choice or not, but the nervous system does both of those answers
<span>Heart Rate Reserve, HRR. Heart rate reserve (HRR) is the difference between resting heart rate (HR<span>rest) and maximum heart rate</span> (HRmax). Heart rate reserve is used when determining exercise heart rates. The Karvonen formula is used to calculate exercise heart rate at a given percentage training intensity.</span>
A: a closed adoption.
A closed adoption is when a child is adopted and the record of the biological parents is kept sealed, which would give her privacy; the child nor the adoptive parents would know she is the mother.
A. Scheduling time can help prevent you from avoiding exercise.
