Bibliografia

1. Sollerhed AC, Ejlertsson G. Low physical capacity among adolescents in practical education. Scand J Med Sci Sports 1999; 9: 249-56.

2. Fletcher GF, Balady G, Blair SN et al. Statement on exercise: benefits and recommendations for physical activity programs for all Americans. Circulation 1996; 94: 857-62.

3. Fletcher GF, Balady G, Amsterdam EA et al. Exercise standards for testing and training. Circulation 2001; 104: 1694-740.

4. Chan SP, Luk TC, Hong Y. Kinematic electromyographic analysis of the push movement in tai chi. Br J Sports Med 2003; 37: 339-44.