Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Push-up position. Push body back, lift hips (straight legs/arms). Bend arms, dive nose to ground. Lift head up/forward, straighten arms. Reverse: push back, lift hips. Repeat.
Smooth transitions (no jerking). Elbows close to body (triceps on, shoulders safe). Tight core (protect back, hold form). Inhale forward, exhale back to down dog. Build shoulder/chest/hip flexibility.
MuscleTrain is actively being built. If something looks broken, or you have a suggestion, let us know — it really helps shape the app.