Habitual elbow joint use time is associated with pain adaptation but not strength performance in young adults : a cross-sectional multithreshold classification study
This study investigated the differences between weekly elbow joint use time, pain level, and isokinetic moment in young adults using multiple exposure classification strategies. A total of 67 participants were cate-gorized using three grouping approaches: median-based (<6 hr vs. ≥6 hr/wk), quartile-based (<6, 6–8, 8–10, and >10 hr/wk), and thresh-old-based (<10 hr vs. ≥10 hr/wk). Elbow joint pain was assessed using a visual analog scale and isokinetic moment was assessed using an isokinetic dynamometer at angular velocities of 60°/sec, 120°/sec, and 180°/sec for both flexion and extension. Across all classification ap-proaches, nondominant elbow pain was consistently lower in higher- use groups (P<0.05), whereas dominant-side pain did not differ signifi-cantly. Most isokinetic moments were also comparable between groups; however, dominant flexor peak torque at 120°/sec was slightly lower in the ≥10 hr/wk group (P=0.049). These findings suggest that weekly el-bow joint use time is more strongly associated with pain-related neuro-muscular adaptation than with measurable strength performance in young adults. Multithreshold classification approaches may provide a more comprehensive framework for evaluating exposure-related up-per-extremity functional characteristics.
목차
Abstract INTRODUCTION MATERIALS AND METHODS Study design and participants Body composition measure Elbow pain measure Isokinetic moments of elbow joint measure Statistical analysis RESULTS Demographic and anthropometric characteristics Comparison between groups classified by the median frequency of elbow joint use Comparison of baseline characteristics among quartile-based elbow joint use groups Comparison between groups classified by the 10-hr/wk threshold of elbow joint use DISCUSSION CONFLICT OF INTEREST ACKNOWLEDGMENTS REFERENCES
Dong Hyun Yoo [ Research Institute of Sports and Industry Science, Hanseo University/Department of Physical Education, Graduate School of Hanseo University, Seosan, Korea ]
Yong-Seok Jee [ Research Institute of Sports and Industry Science, Hanseo University/Department of Physical Education, Graduate School of Hanseo University, Seosan, Korea ]
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