There are no specific age limits that apply to the use of the BuiltLean Program. With that said, you should always check with your physician before starting an exercise, and/or nutrition program, especially if you have any special clinical, or medical considerations.
The workouts in the program are designed to become more challenging over the course of 12-weeks. Each phase includes more difficult and intense exercises. While the workouts can be modified to make them less intense, and the pace of progression can be varied, BuiltLean is designed for healthy adults with normal health and mobility.