Differences in impact characteristics,joint kinetics and measurement reliability between forehand and backhand forward badminton lunges |
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| Authors: | Morten Hauge Nielsen Jan Noergaard Lund Uwe Gustav Kersting |
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| Institution: | 1. Department of Health Science and Technology, Aalborg University , Aalborg, Denmark;2. Li Ning Sports Science Research Center, Li Ning (China) Sports Goods Co., Ltd , Beijing, China;3. Department of Health Science and Technology, Aalborg University , Aalborg, Denmark  https://orcid.org/0000-0001-9373-2080 |
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| Abstract: | ABSTRACT This study identified the effect of badminton lunging directions on impact characteristics, joint kinetics and measurement reliability. A total of 14 badminton players performed 20 lunges in both forehand and backhand sides. Ground reaction force (GRF) and three-dimensional joint moment variables were determined for further analyses. Paired t-tests and Wilcoxon signed-rank tests were performed to determine any differences between the two lunge directions and intra-class correlation (ICC) and sequential averaging analysis (SAA) were used to estimate the minimum number of trials. Compared to the forehand side, participants experienced significantly larger total GRF impulse (+ 3.8%, p = 0.021) and transverse moment (hip + 63.5%, p < 0.001; knee + 80.7%, p = 0.011), but smaller hip (?7.7%), knee (?18.7%) and ankle frontal moments (?58.0%, p < 0.05) in backhand lunges. The minimum number of trials was similar for both lunge directions, as the averaged absolute differences was less than one in both ICC and SAA. Furthermore, smaller minimal number of trials was determined by the ICC (7.9–8.0), compared with the SAA approach (9.5–10.3). Lunge direction would influence GRF and joint loading, but not on the measurement reliability. These results give important insights to establish performance or equipment evaluation protocols during badminton lunges. |
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| Keywords: | Lunging intra-class correlation sequential averaging analysis |
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https://orcid.org/0000-0001-9373-2080