Single Leg Bent Knee Lowering

Key points:
weighted object in hands should be directly over your chest, straight arms, and does not move
lower back is pressed firmly into the ground and does not lose contact
knees are bent in a 90 degree angle
keeping the 90 degree angle, slowly lower one heel to the ground and then back to the top
if you cannot keep contact with the ground as you are lowering your leg, shorten your range of motion