Emsculpt is a non-invasive procedure that creates muscle definition. It also recently gained approval for treating biceps, triceps, thighs, and calves. One 30-minute session produces nearly 20,000 supramaximal muscle contractions that you CAN NOT do on your own.. Contracting repeatedly without rest stresses the muscles, triggering rapid changes at the cellular level that make them grow bigger and stronger. The result of the combined action of muscle tightening results in stronger, more defined muscles.