For various reasons, at 40 and years of being sedentary and my health failing, I settled on a combination of DDPY(oga) and consistent strength training with the assistance of a personal trainer.
I had previously trained in powerlifting a decade or so earlier, so I was a _little_ prepared, but honestly the combination of the two was absolutely lifechanging.
Similar for me, early 40ties, started June with strength training and been combining this with mat/reformer pilates and cardio on a bike trainer. I can also say its been life changing. I'm not boasting or anything here, but I went from a skinny guy to a what one would call a "ripped" guy in a matter of like 2 months. I was (and still am) completely astonished how a human body can change so fast.
I had previously trained in powerlifting a decade or so earlier, so I was a _little_ prepared, but honestly the combination of the two was absolutely lifechanging.
I cannot recommend it enough.