5components of health-related fitness question 29 options: the ratio of body fat to lean body mass, including muscles, bones, water, and connective tissues. the ability of your muscles to do their job over a period of time without becoming tired. the ability of the body's circulatory and respiratory systems to supply fuel and oxygen during sustained physical activity. the ability to move the muscles and joints easily through a full range of motion. the amount of force a muscle can exert, typically in a one-time burst effort. 1. cardiorespiratory endurance 2. muscle strength 3. muscle endurance 4. flexibility 5. body composition