How to Determine how many reps of exercises you should do

So you've finally created a nice body-toning workout that consists of all the exercise your body needs to burn calories and stay slim: Push-ups, bicycle crunches, thigh lifts, lateral arm lifts, and shoulder presses. But then arises the second biggest problem after figuring out an exercise routine: How many reps of each do you do?

It's a common question that many people sort of play by ear, sometimes forgoing reps altogether and instead doing as many as their body can handle. Watch this exercise video to learn the rule of thumb for exercise reptitions and how many sets of reps you should do.