Add "adductors" and "forearms" to list of muscles in "Exercises"

[wuwei7]

Hello,

I've been using the app and there are two other muscle groups that are missing: adductors and forearms. There's also abductors but as they're split between glutes and thighs I don't think they need their own category (well, not for my needs anyway, but feel free to add them if you think they should be there).

Thanks a lot.