This isn’t the case if you’ve done the right things . My strength hasn’t deteriorated at all in fact I’m at my strongest I’ve been and no gym in 7 years though I’m going this year . Bone and muscle density get weaker if one doesn’t put the right things in their body ,unless your talking about anyone over 60 this isn’t a fact it’s the norm bc most ppl don’t actually lift weights which will age you no matter what diet your on .
( Yes, lifting weights, also known as resistance training, can significantly slow down the aging process by preserving muscle mass, improving strength, and potentially even impacting skin health, making it a valuable exercise for aging well; studies show that even starting strength training later in life can provide significant benefits against age-related muscle decline. )
That doesn’t even mention improving or maintaining bone mass , which has a direct link on health the stronger your bones the less likely you’ll suffer any health alignment.