The kneeling rollout trains the core using an ab wheel or a barbell with rolling plates.
Muscle group: Abdominal
Steps
Place the barbell or ab wheel on the floor in front of you. Kneel and take a shoulder-width overhand grip on the bar or grasp the wheel handles. Slowly roll forward only as far as you can keep your back neutral. Keep your arms straight, knees bent and feet off the floor. Pull the implement back under your shoulders under control.
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