Bowflex Treadmill 10 Assembly & Owners Manual page 45

Dynamic Heel Drop
Place the ball of one foot on the edge of a step or staircase.
Place the other foot slightly in front. Lower the heel of the
back foot as far as comfortably possible, keeping the knee
straight. Release the stretch by lifting the heel as high as
comfortably possible. Each repetition of the sequence should
take 1 to 3 seconds. Repeat as a continuous, controlled, fluid
sequence 10 or 20 times. Repeat the stretch with the other
leg
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Assembly / Owner's Manual