Not sure if you’re genuinely asking at the end there, but you’re probably not doing anything wrong!
As someone who is not a doctor (check with one and go with what they say): you’re at the age where sarcopenia starts accelerating rapidly. And from your description it sounds like the most likely cause for your symptoms. It affects basically everyone so this is somewhat of a safe assumption
The good news is you can pretty much totally reverse all the effects with resistance training and a couple diet changes to support your training. What we’ve found is that many people even up into their 80’s can be restored to strength similar to that of an average (untrained) 30 year old. Which is a supermassive win in terms of quality of life and independence
The bad news is that about 90% of people hear “exercise and eat healthy” and just roll their eyes like it’s a cliché, unobtainable ideal that everyone knows they should do but nobody does. Or they think they are already doing it, but they don’t realize they need resistance training specifically. It’s also common for people to believe they have somehow “missed the boat” on training because they aren’t twenty anymore (I’ve even heard 28 year olds say this).
But the therapeutic dose for training is very attainable. Don’t need to become a gym bro. Don’t need to obsess over gains. Like 2x a week, one hour each, could probably get it done in 40 mins once you really know what you’re doing. And it’s very worth doing, you get back the time investment about tenfold just from the increase in energy
But yeah, just wanted to throw it out there for you or for anybody feeling the same way who might end up thinking they want to give training a chance! For disclosure I am a trainer at a local gym but I don’t have an online service or anything to sell on lemmy. As such I’m happy to answer any questions and offer suggestions on how to get started