Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Start in a high plank. Lower your chest while bringing your right knee to your right elbow. Push back up, returning your leg to the plank. Alternate sides, repeating for the desired reps.
Maintain a straight line from head to heels. Engage your core. Control movements, avoid rushing. Keep elbows close to your body. Exhale on the push up, 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.