The ratio of the one-day part of energy to the heat part, that is, the efficiency (效率), improves as the lifting weight increases and the contraction speed decreases, but it worsens when it exceeds a certain weight or is shortened too slowly. For example, when climbing a staircase with a normal slope, the speed of about one step every two seconds is the most efficient. As such, muscles and nerves exist as one unit of exercise, so it is also necessary to understand the nerves involved in order to understand the muscles. 비앤비 여성전용아로마스웨디시 마사지