Step 3: Change the position of the body in relation to gravity (from time to time). (sequencewiz.org)
In some dumbbell exercises, like chest flyes or bicep curls, the resistance changes significantly through the range of motion based on the dumbbells relation to gravity. (all-about-arm-exercises.com)
Disks rehydrate more easily when we change body's position in relation to gravity. (sequencewiz.org)