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跨膈压的测定可间接反映呼吸肌肌力，故跨膈压可作为呼吸肌肌力训练前后的客观指标。本实验选择２３例无呼吸系统疾病的正常人，测定其跨膈压及最大跨膈压值，得到结果为：跨膈压值为２．２５±０．９７ｋＰａ，最大跨膈压值为５．０９±２．２４ｋＰａ，４０岁以下年龄组Ｐｄｉｍａｘ值较４０岁以上组高８．３９％，男性较女性高２７．４％，但统计学上无显著差异（Ｐ＞０．０５）。
Trans diaphragmatic pressure measurement can indirectly reflect the respiratory muscle strength, so diaphragmatic pressure can be used as an objective indicator of respiratory muscle strength before and after training. In this study, 23 normal subjects without respiratory diseases were selected and their diaphragmatic pressure and diastolic pressure were measured. The results were as follows: the diastolic pressure was 2.25 ± 0.97kPa and the diastolic pressure was 5. 09 ± 2.24kPa. The Pdimax of the age group under 40 years old was 8.39% higher than that of the group over 40 years old, while the male was 27.4% higher than the female, but there was no statistical difference (P> 0.05).