Just look at the brand and anti-counterfeiting signs, generally do not fake, because selling these things in the gym is profiteering. A friend of mine works as a coach in the gym. Their gym sells 850 yuan, and the same Taobao sells for more than 300 yuan. He thought it was profitable, so he bought it on Taobao and sold it in the gym. His boss found out and fired him, haha.