Yet the lifestyle of people during all periods of biblical history required them to get plenty of exertion in a typical day whether they wanted it or not. Walking was a major form of transportation, and many daily tasks, like carrying water from a well, kept muscle tone strong. There was enough enforced exercise in daily life that the need for planned exercise just to stay fit would have been superfluous for many. Much has been said in our own day about the need for regular exercise, and we are all aware of its importance for healthy living. The only point I want to add is that we should plan exercise which is enjoyable to us and fits our lifestyle.
All exercise requires some discipline.
Yet if it's basically fun to us, we'll more likely stick with it. Assess your exercise needs, then feel great freedom to plan time in your schedule to meet them, even if this means reducing other commitments. God, in uniquely designing our lives, has given us each a certain level of physical and emotional energy. If in response to his Spirit we manage it well and live within it, we can bear significant fruit for Christ. If out of envy or a poor self-image we try to push ourselves beyond it, we'll become vulnerable to burnout and fatigue.