When you’re comfortable, let go of the handrails. Holding on can result in poor walking form.  For a smooth stride, take slightly longer steps than usual, since the belt is pulling your foot back.  Listen to your feet. If you hear a loud thumping, you’re landing flat-footed. Try landing on your heel and rolling through the ball of your foot to your toes.  To avoid hunching on an incline, lean forward from your ankles. Don’t bend at your waist. More from Prevention: 10 Treadmill Mistakes You Don’t Know You’re Making