Propulsive Force, Coordination Efficiency and Energy Expenditure Among Butterfly Swimmers of Different Levels

• Main Authors: Sakura Hung, 洪櫻花
• Other Authors: Shen-Yu Hsieh
• Format: Others
• Language: zh-TW
• Published: 1995
• Online Access: http://ndltd.ncl.edu.tw/handle/53298453465494578581

碩士 === 國立師範大學 === 體育學系 === 83 === This study investigated the propulsive force, coordination efficiency (CE) and energy cost of arm stroke (AS), leg kick (LK) and whole stroke (WS) among butterfly swimmers of three different levels in butterfly swimming. Thirty-two(32) high school and college male swimmers were studied. Subjects were divided into 3 levels based on butterfly swim performance: Level A (n=11), Level B (n=10) and Level C (n=11). An identi- cal-subject with repeated-measure design, and a balanced-order testing sequence were used. Power-Rack (Total Performance, USA) was used to determine propulsion for AS, LK and WS. Post exer- cise 20sec VO2 after each swim was used to calculate aerobic energy expenditure. Post swim blood lactate was the anaerobic demand. Results and conclusions were as follow： 1.Level A swimmers generated the highest propulsion (40.77 ±18.10 W), which was significantly greater than Level B (33.74± 14.83 W), and Level C (28.26±12.18 W). Level A swimmers also has the highest CE (9.51±7.69%), and was significantly greater than Level B (-5.08±13.79%) This indicated that better swimmers not only can generate higher propulsive force, they also have greater CE. 2.The propulsion of AS is 49.54% and LK is 46.59% of the WS propulsion. Thus, both AS and LK propulsion are important for butterfly swimming. 3.Energy expenditure during LK (0.20±0.06 kcal/M) was significantly higher than during AS (0.15±0.04 kcal/M) Thus, more LK may be used for aerobic training. Blood lactate during AS (10.8±3.0 mmol/L) was larger than during LK ( 7.5±2.3 mmol/L), wich indicates anaerobic demand was greater for AS. Thus, more AS may be used for anaerobic training.