In the UK where everyone has decent basic health care on average you live 2 years shorter if you own a horse. It’s worse than riding a motorcycle (1 year shorter). It turns out that owning a big animal that will kick you if you look at it funny or throw you off if it gets startled by a packet of crisps in the road isn’t that great for your health.
Long distance runner here. Never felt nausea after a run. Intense hunger yes, feeling sick no. My ex used to feel sick if she was just late for a meal. I’d never encountered that in somebody before. I just assumed that she was wired up incorrectly like that thing where some people sneeze if they step into bright sunlight.