Aerobic running is done during long runs. Aerobic means “in the presence of oxygen”. This is the type of running you do when you feel “slow” and comfortable. When running aerobically, your muscles can get enough oxygen from the blood to process the energy in the cells (burning fat in most cases). The minimal waste products produced during aerobic running can be easily removed, with no lingering build-up in the muscles.

Speed training gets you into the anaerobic zone: creating an oxygen debt. Anaerobic running involves going too fast or too long for you, on that day. At some point in the workout, when you reach your current limit, the muscles can’t get enough oxygen to burn the most efficient fuel, fat. So they shift to the limited supply of stored sugar: glycogen. The waste products from this fuel pile up quickly in the cells, tightening the muscles and causing you to breathe heavily. You have encountered a condition called an “oxygen debt”. If you keep running for too long in this anaerobic state, you will have to slow down significantly or stop. But if you are running for a realistic time goal, and are pacing yourself correctly, you should only be running anaerobically for a short period of time, at the end of each workout and race.

Jeff Galloway Resources: Visit the E-Shop where you will find “Galloway’s 5K/10K Running” and other books for your running library. You will also find training tips, training groups, running retreats and more. 

Join us in Atlanta for the 2017 Jeff Galloway Race Weekend! To register or find out more information on the JG 13.1, The Double G, Barb’s 5K, Fit Kids Run and other weekend events go to:

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ANNOUNCING the new Galloway Run-Walk-Run training app! With coaching, motivation, nutrition, a FREE run-walk-run timer, and more!