Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Start kneeling, hands shoulder-width apart, fingers forward. Lean forward, placing weight on hands, elbows slightly bent. Wrists under shoulders, core engaged. Lower chest towards the ground, then push back up with control.
Warm up wrists and forearms beforehand. Start with a limited range of motion. Maintain a neutral wrist position. Stop if you feel pain. Consider a padded surface.
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