Is a combination of multiple exercises (8-12) without a break, on different muscle groups – as far apart as possible (the greatest acceleration of blood flow throughout the blood stream). The basic interval is 30 seconds, followed by a short, 15 seconds, pause to move to next station. In 1 training session you passes the circuit 3-4 times. Each station is made to train different muscle parts. The same circular training can be carried by a professional athlete and a beginner – the circles are challenging to the cardiovascular system (oxygenation of your muscles), the capacity of each individual being different. Everyone chooses the difficulty due to speed and frequency of movement. Of course, you can add to the intensity with higher weights.