My 17 year old son has been working over time to help me solve all things technical.
There is an expression that is so appropriate for fitness: move it or lose it. Well intentioned sports therapists or doctors sometimes recommend complete rest for an injury, and then more bad things happen. Nowadays, the advice is often to keep it moving.
So you thought it was going to be like your daughter’s ballet class. After a very rude awakening, you realize this just might be the hardest workout of your life.