All of this is moot until you’ve started using an active foot; before that, hip flexors just dominate, accruing all the power and then not knowing what to do with it. It all sounds pretty straightforward but also, impossible: how can it be that simple, that one minute you start thinking of your back foot as Velcro, and the next, you have activated the right muscles, in the right way, in the right sequence?
myDrReferences 1. American College of Sports Medicine Position Stand: The recommended quantity and quality of exercise for developing and maintaining cardiorespiratory and muscular fitness, and flexibility in healthy adults. Med Sci Sports Exerc 1998; 30: 975-91. Available at: http://journals.lww.com/acsm-msse/Fulltext/1998/06000/ACSM_Position_Stand__The__Recommended_Quantity_and.32.aspx
If you currently praise coffee for keeping your digestive system going strong, get ready to start thanking your morning walk instead. That's because a regular walking routine can greatly improve gastric mobility, says Tara Alaichamy, DPT, a physical therapist at Cancer Treatment Centers of America. "One of the very first things an abdominal surgery patient is required to do is to walk because it utilizes core and abdominal muscles, encouraging movement in our GI system," she says. (Check out these 7 things your poop says about your health.)
Keep in mind that both fuels are almost always burned simultaneously, except during the most intense, short-term bursts of energy, like sprinting and weightlifting. It's the percentage of fat and carbohydrate burned that changes during a workout depending on the intensity, but you almost never burn just one exclusively. You burn fat while you're at rest, and you burn it during virtually every moment of exercise. It's a myth to think that it takes 20-30 minutes of exercise before your muscles start burning fat.