1. Sport is for professionals. This idea applies only in the case of performance sports. The native qualities required for professional sportsmen (speed, skills, specific height, etc.) can only be developed, they can’t be formed by training. As long as the aim of a regular person is not performance, almost all sports can be practiced for keeping the body in a good shape. It’s all about dosing the training you chose, so that the benefits are bigger than wear and tear. Even the sports considered tough can be practiced in a ‘soft’ way (tae-bo, mini-triathlon, jogging, etc.).
2. Training is tiring. This idea is true as long as it refers to consuming all your energy (muscular and hepatic glycogen), but it doesn’t mean that training gets you into that state of exhaustion which would slow down the process of recovery of the body. Even in performance sports, the purpose is to have rather effective than exhausting training, so that the body can get the stimulation necessary to qualitative progress from one training to the next.
Even more than in other sports, in fitness the sportsman is spared overexerting. However, the training must not...