Answer:
This depends on what your goals are. For example, if you are trying to lose weight you would want to do more reps with less strain (for weight training this would mean lighter weights). However, if you are trying to gain muscle you should have more strain (use heavier weights) and less reps. So boot camp style fitness training can be effective if it is done the right way, but it may not be the best choice for you depending on what your goals are. Either way, you should find a personal trainer, and they should be able to determine what kind of training is best for you.