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Body composition in 15 healthy students in which participated the 4th Henan university Tennis championships was determined with bioelectrical impedance (BI) method. After 16 weeks training, Results showed that their body composition was improved significantly: reduce their body mass, body fat content, increase lean body mass, muscle mass, Basal metabolism, and promote the development of physical health. Keywords-Body composition; Tennistraining; Exercise and health I INTRODUCTION Body Composition refers to is organism Fatty tissue and the non-Fatty tissue's content and the percentage which occupies in the body weight(1).The human body is mainly consisted of water、 protein、fat、soluble mineral salts, it's a measure of individual health and an important indicator of the standard figure, and it can monitors the nutritional status of 、fluid balance and the evaluation of growth and development. Most scientific researches indicated that regular physical exercise can improve body composition, reach its ideal result.But In the 21st century, students' physical health is not optimistic. Bodymass and body fat was increased with age, exercise ability impaired and physical fitness declined with age in 18 to 23 years old students(2). Chinese college the girls students obesity rate 1.21 times are boys, girls hidden obesity 2.24 times boys(3). Tennis is a good sport, it has many merits that Moderate-intensity、easy to learn、 without restriction to court, the mass sports activities based on a better fashion, and it can cultivate students will、feelings, healthy, is a sport loved by the students. There lack deepen systematized stud about tennis training on sedentary students. the present study mainly to explore 16 weeks of exercise training on tennis body composition of university students,and to help students to establish a correct concept of body shape, improve exercise awareness.

Changes in Body Composition of Students after 16 Weeks Tennis Training