There's no such thing as starting strength training 'too late'
There's a common belief that strength training is a young person's activity, and starting in middle age or later is either pointless or dangerous. Research on older adults — including people trying strength training for the first time in their lives after 60 or 70 — consistently shows significant gains in strength and muscle mass. The body retains its capacity to adapt to a strength stimulus across essentially the entire lifespan, even though the absolute pace of progress does slow down somewhat with age.
What's more, the benefits of strength training are especially meaningful for older adults: it directly counters sarcopenia — the age-related loss of muscle mass and strength that starts as early as your 30s and accelerates after 60 — and is linked to a lower fall risk, better bone density, and staying independent longer than sedentary peers.
The only real difference for someone starting later in life is the need for more gradual load progression and, ideally, some professional supervision at the start to dial in technique, especially with pre-existing joint issues. But age itself isn't a reason to delay starting strength training — the later you start, the more years of benefit you miss, not the other way around.