We sign up for this class because it will allow the muscle or group of muscles to sustain repeated contractions against a resistance for an extended period of time. This accomplishes our goal to maintan a muscle contraction for a long period of time without getting fatigued.
Explanation: It might be it's your fingers are just blistering up. How often do you use your keyboard and mouse in general? I'm just suggesting I don't have a full-on answer.