Interesting.
I note you identify as asexual so it is a case that you just don't feel any desire to get to orgasm voluntarily including by wanking?
Or, as you mention sports & gym, have you bought into the idea that you must be sexually frustrated in order to perform well at these? FWIW, I did some searching about this and, while it seems people who have very recently cum may be too mellow to do well in a competition, you probably don't have to hold off for that long, i.e. there it won't make much difference if it has been 24hrs since your last cum. At the last Olympics they were supplying condoms to athletes.