This question is broad and has different meanings depending on age, environment, and genetic influences. Fit at six is different from fit at sixty! Weather and proximity to nature affect fitness. Genetic predisposition to illnesses and unwellness influence fitness possibility. Birth defects affect fitness as well.
Nonetheless, this is a question I can pose to God. Is there way to be fit? Here is God’s answer:
“All animals have been designed to be functionally fit when they are well fed, well rested, and well toned. They require a home territory that is secure (to provide a place for proper rest and procreation) and challenging (to provide a place for using the instincts, intellect, and physical capabilities). Without supportive nourishment and home territory, animals will not be fit according to their design.
Humans who are nourished adequately, feel secure in their sleeping environment, have physical and mental stimulation and challenges, build comforting relationships, and listen to instinctive and internal messages, will be fit.
The ways to fitness are through satisfaction of all of those requirements. Each requirement is necessary for fitness actualization. Connection to the environment through focus on growing vegetation and concern for the other animals can overcome deficits of fitness and can contribute to life quality.
Fitness is a worthwhile pursuit for humans. It is a natural pursuit.”
When we are fit, we are living the design!