I don’t know anything about Home improvement
I noticed several large carpet bumps ??
This seems to be on areas I walk over the most .
Also there is an area where I practice mma stuff and the carpet is very bumpy ??
Very alarming and I don’t know how to fix it
One web page said I have to move all the furniture out and re stretch and re glue it back
This looks hard
It's not hard at all, but you will need a power carpet stretcher (recommended over a knee kicker), a utility knife and blades, a medium putty knife and possibly new tack strips. Don't use glue. That's what your tack strips are for. I've done it a few times.
P.S. Get someone who knows what they're doing.
Will it get worse ???
Would just a power stretcher work alone
It will get worse, and you can do it with just a power stretcher. . . though in tight places you might also need a knee kicker. Here's the thing, if the carpet is in good shape, see if you can find an experienced handy man who does carpet work on the side. That's really the only thing that makes any sense if you don't have the tools. A knee kicker is not too expensive, but to do it right, you really should use a power stretcher. It's really not hard to do, but for about two-hundred bucks, you can get the man and the tools. Just get the furniture out of his way. There's no money in it for carpet-installing outfits. They only do volume work. If the carpet is old, just replace it and go through Home Depot or Lowe's contractors.