Can't run 10k straight without needing a break? Yoga headstands and balancing poses just not easy for you? Don't want or enjoy being dairy-gluten-egg-sugar-grain-caffeine free 100% of the time? Can't fit into a size 0 dress, now or ever in your life. Congratulations, you might just be a real human being!
Being healthy in mind, body and spirit is a personal journey with individual goals and targets. You have been given a unique body with unique needs and competing for the same goals as everyone else around you might not be the best idea. Do I think healthy competition with a friend to get to the gym 2-3 times a week, or maintaining your reduced-sugar diet goal is good? Of course! Staying accountable with a friend, partner or family member is a great way to get you to achieve your own health goals, but keep in mind that the only person you are truly competing with is yourself. Nurture your body and your mind. Be gentle with yourself. Focus on the health goals that make the most sense for you, be it physical, nutrition, emotional or otherwise.
Comparing and competing with others is over-rated ;)