There is no quick and easy way to go from fatness to fitness. The realistic approach to losing fat includes proper dietary controls and use of strength training to ensure you loose body fat and not muscle. Rehabilitation and the prevention of injury. Properly conducted strengthening exercise is capable of greatly increasing structural integrity. Unless the actual cause and effect of exercise is clearly understood and accepted, impossible goals will be sought by many of the people now interested in exercise, but little or nothing more then frustration will proceed.
Many people spend years exercising with very little to show for their effort.
Approach expectations and exercise, and it will become a rewarding part of your life.