Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Set an incline bench to 30-45 degrees. Sit, holding a dumbbell in each hand (palms facing each other). Lie back, feet flat, back pressed against the bench. Extend arms above chest, elbows slightly bent. Lower dumbbells in an arc until you feel a chest stretch. Pause briefly, maintaining chest tension. Raise the dumbbells, squeezing your chest. Repeat.
Maintain a slight bend in elbows. Control movements for muscle engagement and injury prevention. Retract shoulder blades and press them against the bench. Prioritize form over heavy weight. Exhale on the lift, inhale on the lower. Keep wrists straight.
MuscleTrain is actively being built. If something looks broken, or you have a suggestion, let us know — it really helps shape the app.