What kind of foods are you eating? I would recommend a high carb and protein diet that's also low in fat. Carbs give you energy, protein helps repair your muscles after a workout, and fat just gives you more fat. The carbs will give you more energy and endurance and the protein will keep you healthy. I would also recommend going running and getting some cardio in. A good balance of weight lifting and cardio exercises will help you achieve overall health and increase your endurance too. Good luck!
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