Abstract
Background
Chest expansion (CE) is affected by the strength of shoulder abductor and adductor muscles. However, there is a scarcity of information regarding the quantitative nature of this link.
Objectives
To investigate the relationship between CE and the peak moment (PM) of the shoulder diagonal adduction and abduction in healthy college females.
Methods
Seventy-four female university students between the ages of 18 and 24 participated in this cross-sectional study. The peak moment of the examined muscles was tested at 90o/s. At the end of the inspiration and expiration cycles, the CE was measured in centimeters (cm) at the upper and lower levels of the rib cage using a measuring tape.
Results
The lower CE was significantly greater than its upper expansion (p = 0.003). There was no significant difference between the shoulder joint diagonal abduction and adduction PM (p = 0.101). However, there was a moderate positive correlation between shoulder diagonal adduction PM, and both upper and lower CE (r = 0.648, p = 0.001; r = 0.548, p = 0.002, respectively), and a fair positive correlation between the shoulder diagonal abduction PM, and upper and lower CE (r = 0.383, p = 0.037; r = 0.419, p = 0.021, respectively).
Conclusion
The results imply that the lower chest mobility was greater than its upper mobility among female college students. Furthermore, the shoulder adduction moment is related to upper and lower CE. These findings may serve as indicators in pulmonary and cardiac rehabilitation.
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