Yes, as a function of being overweight mostly. Your medical age is a factor derived from height, weight and any medical conditions that fall outside a demographic "normal". It is arbitrary in that sense like having your BMI compared to an Ethiopian.
Anecdotally, I look at pictures on youtube for random events in the USA and see a lot, maybe >30% of the young people meeting the criteria for being obese.
Oh, yeah...I think of me at age 10, (1960s), very wiry girl, and look at relatives that ae now.