The purpose of this study was to compare the skill factors between won and lost sets and between winners and losers in IWTC (International Wheelchair Tennis Federation) men's team competition. in 2007 and expected to understand the prediction and the regression equation of lead to win by individual skill factors. After recording, statistics analyzing, and discussing the conclusions were:<BR>1.To compare the variation of thirteen skill factors between won and lost sets, there was significant difference (p＜0.05) in Aces, unforced error, and successful rate of volley. There were more unforced errors in lost sets than won sets but the other two skill factors were otherwise. There was extreme significant difference (p＜0.01) in 1st serve points won, 2nd serve points won, scoring winner, 1st serve winning percentage, and 2nd serve winning percentage which were more in won sets than in lost sets but other skill factors didn't reach significant difference. To compare the variation of skill factors between winners and losers in wheel chair tennis, Ace, scoring winner, and unforced error reached significant difference (p＜0.05) and there were extreme significant difference (p＜0.01) in 1st serve points won, 2nd serve points won, 1st serve point percentage, and 2nd serve point percentage. But we still can't implicate which the skill factors were suitable for use between two games, we need to confirm in further study.<BR>2. According to the prediction between lead to win and all skill factors by using the method of stepwise multiple regression in wheel-chair tennis competition, 1st serve winning percentage, 2nd serve winning percentage and Aces reached extreme significant level (p＜0.01). The predicative validity of 1st serve winning percentage was the best one which explained variable was 52.0%, and 2nd serve point percentage was 18.9% that implicated the combination of predictive validity reaching to 75.5% and the correlation coefficient is 0.87. The standard regression equation was: lead to win=0.540×(1st serve winning percentage)+0.392×(2nd serve point percentage)+0.233×(Aces).
- wheel-chair tennis
- skill factors