Here is how to win the argument:
Create another nickname, pretending to be a Native American woman. Say that the idea of precommitment to exercise reminds you that in the ancient times the hunters of your tribe believed that it is spiritually important to be fit. (Then the white people came and ruined everything.) If anyone disagrees with you, act emotional and tell them to check their privilege.
The only problem is that winning in this way is a lost purpose. Unless you consider it expanding your communication skills.
I've actually seen an argument online in which some social justicers (with the same bad habits as in the story above) were convinced that it is acceptable to care about male circumcision on the grounds that it made SRS (sexual reassignment surgery) more difficult for trans women. Typically (in this community), if you thought male circumcision was an issue - you were quickly shouted down as a dreaded MRA (men's rights activist).
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one.
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.