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Handgrip mean strength variation according to time and treatment; black box represents high-intensity laser therapy plus hyaluronic acid (HILT+Hy-A) group, whereas grey box represents therapeutic exercise (TE). Results for the linear mixed model analysis (p-values for time, treatment, and interaction for time for treatment). Bonferroni adjustment for multiple comparisons applied between follow-ups of the study compared to baseline; **: p < 0.001.
