I think what people call old man strength is simply an older man who knows a lot better his body and knows how to apply, distribute, effectively use all of his body and more (confidence, experience, many many things) to apply strength to a specific task... and young idiots are like "ohhh old man strength wow its a power ohhh" its simply an older man knowing how to use his body more effectively... Lebron James (or any athlete you prefer) wont ever have more strength at 45 than at 25...but I bet he will know how to use his body more effectively... and for a younger idiot it will seem as strength , thats all