Exercise

Step

How quickly will it make a difference? After four weeks of twice-weekly classes.

How many calories does it burn? 510-612 per hour (depending on height of step).

Will it keep me motivated? You will notice changes in your body shape fairly quickly, but there are only so many times you can step on to a platform before utter boredom takes hold.

Specific benefits A study carried out two years ago by researchers at California State Polytechnic University showed that women who did step aerobics three times a week for six months experienced up to 3.3% increases in the bone density of their spines, hip and leg bones. It has good aerobic benefits as well as toning muscles in the bottom and legs.

Risk factors Not recommended for anyone with lower-back or knee problems. The repetitive stepping could aggravate existing injuries.

http://www.guardian.co.uk/lifeandstyle/2007/mar/06/healthandwellbeing.health