So I am retired, in my 60s), but drafted into many activities such as assistant gardener and allotmenteer for my lovely wife.. she nurtures .. I hack it out!!
Keen triathlete with swimming coaching twice a week (6-7/10 exertion), cycling once a week (5/10) and running more often than not (6-8/10). But I had a niggling glute so backed off the 2-3 weekly trial runs nearly 10 months ago... BUT NOT the calories!! So call it an overall 50% drop in vigorous exercise (6-8/10).
Mean while my BMI for my Endomorph body form crept up to 27!! and waist expanded. Non smoker, low cholesterol, active and fitness through out life, low stress, sensible diet (vegetables from the allotment), but like my beer and we like our dairy!!.
My wife gets a cholesterol warning and I think I am having reflux (discomfort), so chase up an anti-reflux medicine at the local chemist at the bottom of a very steep hill (which I have run and cycled up!!).
Half way up the hill I realise the significance of breathlessness and crushing pains and a minor heart attack. 3 days later out of Bath RUH with a stent and the programme to full recovery.