British researchers found that drinking refrigerated water increased exercisers’ energy levels, especially in hot-weather workouts. Athletes who drank chilled water during exercise worked out 25% longer than people drinking the same amount of room-temperature water. Those participants also claimed their workouts felt easier. Fill your water bottles with cold water right before training in the gym ready for sipping before and during your training session. It will help keep your core body temperature down and your energy up so that you can perform your best and maximise your calorie burn.
Many athletes take caffeine in the form of pills or energy drinks to enhance performance or energy levels during training. Caffeine stimulates adrenaline release and can improve the quality of workouts. A study from the Journal of Sports Science Medicine, found that caffeine (6 mgs per kilogram of bodyweight) increased growth hormone release for at least 30 minutes after weight training session. Caffeine increases blood fatty acid levels, which triggers increases in growth hormone. Caffeine might be a useful supplement because it increases strength and training intensity, and promotes a post-exercise anabolic response.