Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Lie on your back, legs extended, resistance band around feet. Hands behind your head, elbows wide. Lift shoulders, bringing right knee to chest and extending left leg. Twist torso, left elbow to right knee. Alternate sides, extending right leg and bringing left knee to chest, twisting to opposite elbow. Continue alternating.
Control the movement to engage muscles and prevent injury. Twist with your core, not your hands. Secure the resistance band. Exhale during the twist, inhale on return. Maintain a slight bend in the extended leg.
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