I understand what you're saying. I'm 49 and eat up with many autos. I stretch every morning and every night now. I wasn't able to do what I do now, when I 1st started. I started slow. I'd lay in bed, and stretch my entire body. Easily. I didn't force my muscles but wanted to do what my body allowed. I stretched slowly and waited to see all day, and even the next to see if I'd be in pain from it. Surprisingly, I was good. So, started stretching every morning that same way. Then, started stretching my legs while laying in bed. I'll take my legs one at a time and bend at the knees toward my chest. Then I do both. I watched lots of easy mild stretching videos. So I do what I can now. I find stretching through the day helps too. If I'm just sitting at my desk or after I've been in the car for a bit. I stretch my neck and arms. Start slow. Don't push your body. Start walking too. Even if it's just in your yard. Start slow. I'm up to 2 and 3 blocks at a time now. Doesn't sound like a lot. But I'm thrilled lol