" Especially as a beginner, or someone coming off of a long break from training, it is very easy to become overwhelmed and discouraged when you feel like you can't keep up with everyone else.
It's important to remember that regardless of the shape you are in, your only goal should be to challenge yourself to grow. You do that by pushing to your limits, which results in a different pace for every single person in the gym. Find that pace and you'll claw your way through the whole class. You don't have to be in shape to train Muay Thai. You train Muay Thai, and as a result you get in shape. "