This study applies resistance inspiratory muscle training to synchronized swimmers and through two resistance setting methods to explore that the differences in the effects of four weeks of dynamic constant load resistance training versus constant load inspiratory muscle resistance training on improving pulmonary function and specialized athletic ability in synchronized swimmers. Fourteen synchronized swimmers were randomly assigned to the dynamic constant load resistance inspiratory muscle training group (n = 7) and the constant load resistance inspiratory muscle training group (n = 7) for 4 weeks of inspiratory muscle resistance training. Group 1 was trained with the resistance setting of dynamic constant load resistance, and 50% of the maximum inspiratory muscle strength index (S-index) measured every Friday was used as the training load for the following week, while group 2 was trained with the constant load, and 50% of the initial value of S-index was used as the training load. The training schedule of both groups was 5 days per week, 2 sets per day, 30 repetitions per set. The subjects’ related index of inspiratory muscle function, pulmonary function and specialized athletic ability were tested before and after the experiment. Through statistical analysis, we concluded that after four weeks of inspiratory muscle training, the related index of inspiratory function, pulmonary function and specialized athletic ability of both groups were significantly different from those of the pre-training period (p < 0.05), while the peak inspiratory flow (PIF) and the maximal inspiratory pressure (MIP) of inspiratory muscle function indices were significantly different in the group-to-group comparison (p < 0.05). Pulmonary function and specialized athletic ability also had significant differences between two groups (p < 0.05). Compared with constant load resistance inspiratory muscle training, dynamic constant load resistance inspiratory muscle training is more effective in improving inspiratory muscle function, pulmonary function and specialized athletic ability of synchronized swimmers; Trial registration China Clinical Trial Registry, ChiCTR2300072833,26/06/2023. https//www.chictr.org.cn/.
Xu et al. (Fri,) studied this question.