Health crises in your 50s. It's a real epidemic.
Decades of insane schedules, ladder climbing, bill-paying, child raising, family obligations, fast food-grabbing, sofa surfing, and more finally come to roost in your 50s.
In this photo of me above in my 50s, I don't look too unhealthy, but there was hell to pay for a sedentary desk job, twice-a-week fast food, weekend beers, and general neglect as I had always been able to do anything without feeling weak or sickly. In fact, I took on even more responsibilities including being a caregiver.
I was actually just inside in the "obese" range of my BMI (BMI calculator link) in that photo. Yeah, I agree that BMI is not a great indicator, but I did have a belly pooch and some neck fat and arm fat. At 5'8" I can get away with extra weight visually, but not internally.
When I had double-sided Bell's palsy, I found out I had high blood sugar and high blood pressure. It was a shocker for me, but then I had avoided doctors saying, "he will just tell me to lose weight, so I'll wait until I lose weight and see him."