Circulating matrix metalloproteinase (MMP)-2 levels at rest and 2-75 min after exercise.
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Data points indicate mean serum concentrations (± SEM) at the initial and final exercise sessions of a 6-week training intervention (n = 13). Significant differences from resting levels (time effect): †P<0.05, ††P<0.001; significant differences from the initial exercise at the same time point #P<0.05; significant differences between groups at the final exercise *P<0.01. (A) Acute effects of resistance exercise (RE) and resistive vibration exercise (RVE): MMP-2 was elevated from resting levels only in the RE group. (B) Long-term effects: the acute response after the final exercise in the RVE group was elevated over the time course measured at the initial exercise and the RVE group depicted significantly higher MMP-2 levels at all time points compared to the RE group.