Physical fitness is essential and it should be an integral part of our daily lives. If you are curious about boosting your physical fitness, there are many synonyms that you can use to express your interest in it. Some of these synonyms for interest in physical fitness may include enthusiasm for working out, keenness to improve physical health, drive to stay in shape, eagerness to exercise, passion for fitness, dedication to fitness, and interest in wellness. Ultimately, no matter what word you use, the important thing is that you prioritize your physical fitness over other things in your life to maintain optimal health.