If the subject knows something about the fitness here, or if a coach friend takes you to practice, my suggestion is to buy a suit of high-elastic sportswear that suits you, and then buy a set of loose vest shorts. As for shoes, I think it's best to wear sports shoes that suit you. Of course, if you don't run, except slippers, what suits you is the best.
Most people will choose to wear high-altitude ammunition in the early stage and put on a set of equipment for the first time. It feels great, and everything they do is full of energy, giving themselves or others a very professional feeling. However, when they have some training experience and foundation, their muscles begin to appear and their bodies gradually get better. At this time, the vest shorts you bought will come in handy, hahahahaha, and of course, the most important thing is to bring your own water cup. It is important to replenish water during exercise. Always pay attention to your drinking water. There will be a water dispenser in the gym, so you don't have to spend a lot of money on water. It still looks intact. If you want to do high-intensity training, I still suggest buying some equipment to protect yourself, such as wrist pads, knee pads and waist pads, which can prevent muscle strain and protect yourself.
So the subject need not worry about the consequences of going for the first time. Everyone inside is trying to make themselves better. No one will look down on those who work hard. It is best to make yourself comfortable, and the fabric breathes and absorbs sweat. That's all that matters.