Younger than Hack
I had the same problem when I was in the Navy. My wife worked with me to increase my flexibility. I did a lot of stretching. I finally got pretty flexible. Warming up with some walking and running in place just stuff to get the blood pumping. After warmed up I started at the top and worked down stretching each muscle and muscle group. Do long, slow, controlled, stretches. You will quickly reach your limit. When you reach the limit of the muscle on your own then you need help. One way is to have a piece of rope tied off that you can grab and pull to help further stretch, or a towel under your feet to help extend your stretch. You can also have someone help by pulling/ pushing you around or pulling/pushing you down. You will be putting some strain on your muscles so the person has to be trusted to stop when you say and not push or pull farther. When you hit the max hold it for a bit DON'T BOUNCE. Then slowly release. Then repeat. My wife used stretches she learned in martial arts training and it helped me immensely. I went from ends of my fingers at mid shin and my back and legs screaming at me. After a while I was able to reach way past my toes and my chest almost touching my thighs.does anyone have any tips for improving stretching, like an example would be if i stand with my legs locked i don't even come close to being able to touch my toes, i make a little past my knees, i'm about to have to go through some extensive physical testing and i need to get more limber
Effort and time and you will get it.