3. Training takes too long.
Again, this idea is true if applied to performance, which can only be obtained by working a lot. But also in this case short and very intense training or training for relaxation and recovery are often performed. In fitness, you can get to 20-minute training, working only super-series of fast exercises, which could involve, directly or indirectly, all the muscles. Anyway, regular training shouldn’t take longer than an hour and a half. Otherwise, the body will get into the catabolic faze, when the cortisone secretions ‘cannibalize’ the muscles.