Yeah I’ve heard that at every step, wait til 25, wait til 30 wait til 35, I’m currently in the best shape of my life and keep gaining. The 2 most in shape people I know personally all around are respectively 54 and 58 years old, though both are lifer military types and maybe the job kept them in shape/motivated anyone can achieve this and age is just a number. Certain things are unavoidable but I think ALOT of people lean on the crutch of age as an EXCUSE and nothing more.