Question 3 (1 point) question 3 unsaved percentage of fat in your body compared to your lean body mass question 3 options: body composition flexibility cardiovascular endurance muscular endurance save question 4 (1 point) question 4 unsaved this is the quickest and most efficient way to improve structural strength and increase lean muscle. question 4 options: isometric training muscular training isotonic training running save question 5 (1 point) question 5 unsaved is the number of times your heart beats per minute while it’s at rest question 5 options: maximum heart rate resting heart rate target heart rate heart rate