There's a myth that people who need to lose a significant amount of weight can only do so with strenuous, high intensity, high impact exercise. But a myth is exactly what it is. Isometrics can be the perfect exercise for the morbidly obese, since many of the exercises can be done while sitting; physical limitations are no barrier to success.

According to the owner of one popular fitness center, at least 35% of her clients need to lose upwards of 35 pounds - and about half of those need to lose 100 pounds or more.So ... does she force them onto treadmills and "torture chamber" gym equipment? Does she make them run endless laps around a track? Does she close her eyes to their physical limitations and shout, "No pain, no gain!" at them until they are reduced to tears and give up, disgusted and disheartened by failure, once again?