Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Adjust the seat so knees are at a 90-degree angle with feet on the platform. Sit with feet shoulder-width apart, heels flat. Grip handles for stability. Engage your core, extend legs, keeping feet flat and knees aligned. Avoid locking knees; maintain a slight bend. Slowly return, controlling the weight. Repeat.
Maintain lower back contact with the seat. Push through your heels to engage glutes and hamstrings. Keep movements smooth and controlled. Prevent knee collapse; align with toes. Exhale on extension, inhale on return. Start with lighter weight.
MuscleTrain is actively being built. If something looks broken, or you have a suggestion, let us know — it really helps shape the app.