Everyone's quality is still very high when they exercise. As long as you express that you don't want to talk to them, naturally no one will bother you all the time. If the other person is still like this, you can find an administrator or change your fitness program, so you won't always meet such people.
If other people's voices are too loud and make you feel disturbed, you can wear headphones or something, such as noise-reducing headphones now. After wearing it, you can't hear the outside world at all, and you can immerse yourself in your own music world. As for feeling uncomfortable, you can change places or machines.
I won't be disturbed when I exercise, because I think everyone has their own freedom to do anything in the gym. If you really feel that you can't be disturbed, don't go out to exercise, just stay at home and exercise alone. You can buy a treadmill or other fitness equipment yourself, or watch a video to do yoga. It's all good.