Few people who have become out of shape are interested in exercise, and many of them would rather go on a diet than spend time in the gym. They see it as a losing proposition where they will drop few pounds, and the work will go on for a very long time before they are able to see any results. In the modern world, instant gratification is an important factor for most people. The lack of instantaneous results is often a determining factor in why people quit an exercise regiment, but injuries also take their own toll.
Exercising the right way will generally not allow people to see the instant results they want, but it will help avoid injuries. For those who are determined to stick with a program, looking for alternative exercises that can be done without harm is also a good way to get fit without being tempted to stop before their goals have been attained.