Effect of using the Flexi-Bar tool on erector spinae muscle activation under different standing weight-bearing conditions.

Objectives: The Flexi-Bar and Bodyblade are oscillatory tools used in rehabilitation centers worldwide to enhance muscle activity. Because of a lack of reports on the Flexi-Bar, this study focused on erector spinae (ES) muscle activation under different conditions.

Methods: Twelve university students (age 21 ± 2.