answer:If you played a lot of sports in high school, especially contact sports, you can have disc problems that may require surgery. Age is not a factor in back problems. However, if your muscles are that hard, it’s likely that it’s caused by something that you are doing. If you spend a lot of time at the computer, odds are your chair and the height/placement of your computer is wrong for your frame size. I have one chair in my kitchen that when I sit on it and work at the computer, when I stand up, I physically cannot walk for about 45 seconds until my frame adjusts to being upright. Like trying to run in running shoes that are broken down, poor or wrong equipment will cause physical pain. I would suggest taking a yoga class, concentrating on core exercises, and look at getting an ergometric chair if you spend a lot of time on the computer. Hot showers should help with the tight muscles, as well as spending some time away from the computer.