The body can handle any exercise regime you desire, given the time the feature most people lack. Either being afforded the time to exercise, will power to exercise or interest to exercise. Then there are those who see strength training or long-distance running as being detrimental to long-term health.

Where I believe most people fail is not setting an objective goal; to get fit is vague. You need a goal that is measurable, preferably not body weight as your body will structure itself properly for your goal. I suppose your goal could not be ambitious enough but I assume people seek to push themselves.

At the beginning of Covid I was a 235 lbs powerlifter, then I started boxing (gyms opens 6-weeks in Covid) training to compete, dropped to 185 last November with a 10k run at 53:23. Now I am working towards my own goal the 15-50 project; to be able to have powerlifting total of 1500 lbs and run a 50 miler within a weekend. Current lifts are squat - 555, bench - 405, deadlift 605, with my one mile run at 8:43. I have to build my run slow (running at 220 lbs) while I maintain my lifts. I have planned for this take 3 years.

It won't always be pleasant but given time the body will adjust and you will have a much healthier life!