Even basic things such as clothing and equipment can affect a performance. Dance surfaces and lack of proper shoes can also affect a performer's ability to perform at their best. Signs of injury Stretching for too long or too much can give way to an injury. For most activities, the normal range of motion is more than adequate. Any sudden movements or going too fast can cause a muscle to tighten. This leads to extreme pain and the performer should let the muscle relax by resting. Risk of injury Some people get injuries while doing yoga and aerobics so one needs to be careful while doing it. While most stretching does not cause injury, it is said that quick, ballistic stretching can if it is done incorrectly. If a bone, muscle or any other part is stretched more than its capacity it may lead to dislocation or muscle pulls. See also Dance Exercise Physical fitness References Bibliography Arnheim, Daniel D. Dance Injuries: Their Prevention And Care. 3rd ed. Princeton, NJ: Princeton Book Company, 1991. Print. Ashley, Linda. Essential Guide to Dance. 2nd ed. London: Hodder & Stoughton, 2004. Print. . Barratt, Marcia, et al. Foundations For Movement. Dubuque, IA: Wm. C. Brown Co., 1964. Print. Berardi, Gigi. Finding Balance. 2nd ed. Routledge, NY: Routledge, 2005. Print. . Blakey, W P. Stretching Without Pain. Canada: Twin Eagles Educational & Healing Institute, 1994. Print. . Como, William. Raoul Gelabert's anatomy for the dancer with exercises to improve technique and prevent injuries. New York: Danad, 1964; 51-57. . Dilmen, Nevit. Stretching. 2009. Own Work. Wikimedia Commons. Web. 4 Dec. 2010. Franklin, Eric N. Conditioning for Dance. Champaign, IL: Human Kinetics, 2004. Print. FvS. Split, gymnastics. 2005. Own Work. Wikimedia Commons. Web. 4 Dec. 2010. Liedarback, "General considerations," p. 59. McCharles, Rick. Gymnast jumping on beam. 2008. https://www.flickr.com/photos/71035721@N00/2972933329. Wikimedia Commons. Web. 4 Dec. 2010. Pare, Caroline. Caroline Zhang in 2008 Skate Canada International. 2008. https://web.archive.org/web/20120724082853/http://everythingskating.com/. Wikimedia Commons. Web. 4 Dec. 2010. Reinking, Ann, and Linda Szmyd. The Dancer's Workout. London: Bantam Books, 1984. Print. Ryan, Allan J., and Robert E. Stephens, eds. The Healthy Dancer: Dance Medicine for Dancers. Princeton, NJ: Princeton Book Company, 1987. Print. Stuart Wright, Dancer's Guide to Injuries of the Lower Extremity (New York: Cornwall Books, 1985), p. 14. Swischuk, Leornard E. "Doing the Splits: Heard A Pop--Cannot Walk." Pediatric Emergency Care 23.11 (2007): 842-3. Web. 8 Sep. 2010. <http://ovidsp.tx.ovid.com>.