Unfortunately most people fall back into old habits, because they haven’t addressed the core behavioral traits that caused them to be unhealthy. We hear the term “LIFESTYLE” used all the time, but truth of the matter is that’s the only way to sustain lasting change. You must replace old habits with new ones to really ever change your body.
Another key component is attaining multiple skill-sets to create a well rounded athleticism to perform the specific tasks one has set for themselves. A lot of people appear to be fit , but have poor performance.