When you decide to better yourself, you'll be surrounded by people trying to stop you.
Action offends the inactive.
Oh, they'll usually be polite about it. Offering you foods that work against your nutrition plan, often presented as gifts or treats. Expressing false worry about your supplement usage, your food choices, and the number of days you go to the gym. They'll find plausible reasons for you to cheat on your diet or skip a workout. They'll get mad at you for how your healthy choices are affecting their lives.
If anger doesn't work, they'll bribe, they'll mock, and they'll carefully plant negative seeds.
All because you've decided to be better, to be more.
It's the story of the crabs in the bucket. Put a bunch of crabs in a bucket and some will try to crawl out and avoid becoming dinner. The rest won't try to escape, but they'll reach up and pull you down.
When you set a new goal, physical or otherwise, you have unintentionally pointed out other people's weaknesses. Their faults. The dreams they've long given up. They sit around and want and you have royally pissed them off by doing.
Piss them off anyway. Offend them anyway. Crawl out of the bucket and find new friends and better relationships.
Remember, action offends the inactive. And that's not your problem.