If you're looking to improve your endurance, there are a few things you can do at your Muay Thai gym. For example, try doing some interval training. This type of training consists of short bursts of high-intensity activity followed by periods of rest. By constantly challenging yourself, you'll soon find that your stamina has increased significantly. Additionally, make sure to include cardiovascular exercise into your routine. This will help to improve your overall fitness level and increase the amount of oxygen that is delivered to your muscles. Finally, make sure to hydrate thoroughly! Not drinking enough water can lead to fatigue and decreased stamina.