When comparing referred children and general population children (n = 230), there was only a significant difference between the groups in the relation between impulsivity and externalizing problems (regression coefficient of the interaction term β = 0.29, p <.001). (link.springer.com)
They reported that increasing instability displayed greater erector spinae muscle activity, while only a significant difference existed between performing the bench press on a Swiss ball and with the Swiss ball and feet placed on a BOSU ball (dual instability). (strengthandconditioningresearch.com)
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