you can start with your arms out, but you can take it up a notch by holding your balance with your arms at your sides. hold for 30 seconds and then repeat on the other side. want an even greater challenge? stand on your left leg in the middle of the trampoline with a slight bend in your knee. rest your right leg on the right edge of the trampoline, then lift it to about hip height while stretching your arms out to the side. keeping that leg lifted, tilt your upper body slightly forward and move your leg behind you while extending your arms out in front of you. 