Muscle tears in sports often happen when muscle experiences a great amount of pressure almost instantly. When correctly used, e-stim generates muscle contractions with progressively increasing intensity over extended periods of time, thus reducing the risk of muscle tears even under maximum intensity.
Heavy EMS contractions are strongly advised to be taken against isometric resistance, so there is no variation in muscle length during contraction. E-stim workout is generally static without any pressure on the joints. This is the main reason why EMS is the best option for athletes with weak/injured joints, who can’t afford to do any weights training.