Active stretching is considered: A. Stretching a muscle group using assistance.
B. Stretching muscles during active movements.
C. Stretching a muscle without external assistance.
D. Slowly lengthening muscles around a joint and sustaining the stretch.

You are travelling on a long non-stop flight from tahiti to tampa. you have been in the air for about 7 hours and have not moved, since you boarded the plane at tahiti. you need to use the rest room and on standing up feel dizzy. the best explanation for your dizziness