Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Stand with feet shoulder-width apart, holding dumbbells with a neutral grip. Arms straight, dumbbells in front of thighs. Engage core, slightly bend knees. Raise dumbbells laterally to shoulder height, elbows slightly bent. Pause, then lower with control.
Lift with your shoulders, not your arms. Maintain slow, controlled movements. Avoid swinging. Engage your core. Start with lighter weights. Keep wrists neutral. Exhale on the lift, inhale on the lower.
MuscleTrain is actively being built. If something looks broken, or you have a suggestion, let us know — it really helps shape the app.