Keep in mind that those repair components are eukaryot cells, and they have two built in rules that are important here :\ 1) any individual cell, once X energy

Keep in mind that those repair components are eukaryot cells, and they have two built in rules that are important here :\ 1) any individual cell, once X energy passes through them, they senescence 2) from the ovum you grew out of until the last cell alive when you die, only 128 cell divisions happen in that line. That means there is a finite supply of these repair components, these cells, and so there is a limit to how much energy can go through your body before you die. Therefore, you probably want to make sure "peak" effort in any reasonable time interval (e.g. a month, maybe a week) is pretty high, to encourage the machinery to remain well-maintained, but average effort is as low as possible. You should exercise to have a huge amount of effort for maybe 10-15 minutes per month, sprinting for instance, getting your heartrate up to 130+, and keeping it up for a short while, maybe 20-30 minutes, no more. Other than that, you should probably avoid exercise and eat healthy. There are other reasons gym is not a particularly good kind of exercise. It's just not very realistic. Running or biking in the real world, aside from being more fun than in a gym, is also a lot better for you. And probably, having a weekly game of basketball is far better than that.