Calisthenics is good for you, but not so good for your garage. A garage door that frequently goes up and down and acts like it is possessed by a fitness guru is not normal, nor is it something to be trifled with. If this is exactly how your garage door is behaving, there is a reason (a few, in fact) and a way to make it stop.
Wiring
Wiring on your garage door opener could definitely be the problem.
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