Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Hold the gripper, palm facing inward. Position handles comfortably in your hand. Squeeze handles together until fingers and thumb touch, or as close as possible. Hold briefly, then slowly release. Repeat, alternating hands.
Start with manageable resistance. Focus on controlled movements. Train 2-3 times per week. Balance reps between hands. Progress resistance or reps as strength improves.
MuscleTrain is actively being built. If something looks broken, or you have a suggestion, let us know — it really helps shape the app.