While doing shoulder presses or other arm exercises, it's tempting to sit down on a bench, but you'll get more out of your workout if you stand on a BOSU ball, or if you don't have access to one, try standing on just one leg. This not only gets your lower body involved, but the instability forces your core to work, too. If you really feel the need to sit, use an exercise ball.
Don't Just Sit There
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