| Summary: | 碩士 === 樹德科技大學 === 資訊工程系碩士班 === 101 === Objective: This research applies the inertial sensors to identify the ball speed, movement and strength differences between two groups of female badminton players in striking forehand overhead clear.
Subject: Two players from Group A are right-handed (height 160 ± 2.8 cm, weight 57 ± 1.4 kg, within the age of 19 ± 2.8 years, and playing experience 10 ± 2.8 years). Another two players from Group B are also right-handed (height 160 ± 1.4 cm, weight 51.5 ± 2.1 kg, within the age of 15 years old and playing experience 6 years).
Methods: The experiment equips each player right palm, right wrist, and right elbow with wireless inertial sensors (includes triaxial accelerometers, sampling rate of 620Hz). The study uses high-speed cameras and speed-gun for data and shots motion analysis.
Results: The present study offers seven significant findings. First, in the individual player test, with or without the sensor when hitting the ball, the speed shows no significant difference. Second, with or without the sensor, the ball speed of Group A is significantly faster than Group B. Third, the wrist and elbow accelerations of both groups are significantly different when the players are hitting the ball.Fourth, the minimum and total power in the hand and wrist from Group A are significantly larger than Group B when the players are hitting the ball. Five, when the players are hitting the ball, the result suggests maximum strength is from the wrist, secondly from the palm, and elbow contributes for minimum strength. Six, by applying the motion stability cyclic annular area formula to calculate the ranges from two time zones, the result shows the player b motion stability from Group A are significantly better than the player c and d from Group B. Seven, the study suggest kinetic chain performances are different from each players, however in the individual test, evey single player’s kinetic chain sequence does not change much.
Conclusion: first, with or without the sensor does not affect the players’ performance in striking the forehand overhead clear. Second, the players from Group A perform the significantly faster spot speed of striking the ball. Third, the players from Group A show the better motion stability than the Group B players, furthermore, the closer to the striking spot the motion stability is better. Fourth, the players'' personal kinetic chain is quite consistent, which means that after training the players’skill are improving and getting steadier.
Implication: The study establishes a reference norm from the Group A players. This norm provides better understanding for badminton coaches when offering training for badminton players.
|
|---|
