By Kenny Mack
Rate: (1 Ratings)
The human body is an incredible machine able to adapt to almost anything. That's part of the reason why working out can be so frustrating; your body simply adjusts to the demands being placed on it, so results can be difficult to see and gains difficult to realize. Shock your body into showing results by switching up your workout, and incorporating three days of weight training and two days of cardiovascular exercise per week into your fitness routine.
eHow Member: Kenny Mack