Don't cardio on empty stomach I see a lot of guys saying a good way to burn fat is cardio first thing in the morning on an empty stomach. (Warboss, I'm looking in your direction hehe) Don't cardio on empty. 15-20 mins before commencing your cardio, eat a single piece of water-based fruit - an orange or mandarin is perfect, watermelon, apricot or anything else that is really juicy and dribbles down your chin is excellent. If none of that is available, have half a glass of fruit juice. It's nearly as good, just make sure its as fresh as possible and preferably with no added sugar. The reason for this is that when you wake in the morning, your body is still in starvation mode. Due to the lack of food overnight, your body is fasting and holding on to every ounce of fat it can. (Thats why they call it breakfast - you are quite literally breaking your period of fasting. Cool, huh?) Doing cardio while your body is in fat-conservation mode is of limited use. It will burn some fat, yes, but will also derive some limited energy from breaking down muscle tissue - remember your body will be reluctant to part with any energy sources at all while it is being starved. Due to this reluctance, your energy levels during your cardio will also suffer, reducing the overall amount of cardio you can do. A small portion of water-based fruit first thing in the morning is enough to break your body out of its fat-conservation mode and switch it into fat-burning mode. Basically, you're tricking your body into burning more fat by providing a small source of simple carbs for your body, which will convince your body that food is in abundant supply and that subsequently it is under no pressure to conserve energy (fat) supplies. Such a light snack is not going to weigh your down or make you sluggish as would a normal breakfast (anyone fancy some hill sprints with a stomach full of porridge and toast?) but is sufficient to boost your bodies metabolism and break it out of it fasting mode. Your body will subsequently burn more fat during your morning cardio session.