Circuit training is a workout routine that is often used by athletes for stamina and muscle development. There are several different sets of exercises integrated into each circuit that ensure the utilization of the entire body. Circuit training also includes a variety of gym based equipment that can enhance the efficiency of the exercise. Treadmills and resistance based equipment can also be used to increase the difficulty of the circuit training. This type of exercise often focuses on the legs as well as the lower and upper body. The benefits of circuit training are numerous and it is possible to see results over a short span of time. This training form can be combined with weight training to increase muscle strength and tone. cycle, treadmill