I think it's cardiovascular, sickle cell I think you have to be born with, and celiac is an allergy to gluten
Well, that depends on what you ate that day.
Eat healthy and do stretches. The best thing a 12 year old to do. You're too young to do anything super serious imo
Using more time and energy you obviously have not used your time and /or energy efficiency.
B. most exercise machines require spotters for safe operation.
