Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Push-up position, arms straight, hands shoulder-width. Lift hips, walk feet in to form upside-down V, legs/arms straight. Bend elbows, lower head forward toward floor (triangle shape). Push hard through hands, elbows tucked, return to start. Maintain hip angle on press, no chest collapse.
Engage core for balance. Elbows at 45°—no flaring. Beginners: Small range, build up. Control movement, no bounce. Inhale down, exhale up. Hands not too wide; straight body line. Full range, no sagging hips or head drop. Proper foot spacing; prioritize control.
MuscleTrain is actively being built. If something looks broken, or you have a suggestion, let us know — it really helps shape the app.