I use two methods for coding/typing/notes: voice and specialized keyboard. I generally use a specialized braille keyboard, that I can sweat on, however I do wear gloves (see: https://www.atguys.com/store/index.php?main_page=product_inf...).
I know multiple braille codes backwards and forwards, and I generally use a standard 8-key braille keyboard to type English language, computer code, and math. I have a print-related disability, that does not affect visual acuity, but does affect my ability to read (severe convergence insufficiency). So, when working and exercising, I use text to speech feedback when typing with braille code.
For coding with voice I use Dragon Naturally Speaking and VoiceCode (https://www.voicecode.io/). For math and voice I use Mathfly (https://mathfly.org/).
I find it really hard to operate a touchscreen with any dexterity whilst running on an elliptical. Sure the bike itself had really big buttons on the UI, but when I brought in my ipad to play some XCOM, one encounter (usually 10-15 minutes) would take nearly the entire hour I would ride due to butterfingering everything. I can't imagine trying to do anything productive on such a setup.