Sat, Jul-17-04, 15:55
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Senior Member
Posts: 408
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Plan: General Low Carb
Stats: 232/162/162
BF:30%/13%/11%
Progress: 100%
Location: San Jose, CA
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Nurse4god,
You probably started depleting your glycogen. This is also called "Bonking" or "Hitting the Wall". When you exercise for your cardiovasular fitness, you are exercising the systems that handle the delivery of blood and oxygen thoughout your body, namely your heart, lungs and veins. When you are exercising your cardiovascular system "Aerobically", enough oxygen is being circulated to engage your fat-burning mode. At some point, you may have gone "Anaerobic", which means that you were exercising faster (and your heart was beating faster) than the speed at which your cardiovasular system could deliver oxygen. Aerobic means "with oyxgen", Anaerobic means "without oxygen". When you exercise anaerobically, your body switches from fat-burning mode over to glycogen-burning mode. After a period of time, you could start depleting your glycogen supply and experience some of the symptoms that you described.
The solution? Do your cardio a little slower until your aerobic capacity improves. Monitoring your heart-rate will help you gauge when your cardiovascular system goes anaerobic. It's okay for your system to go anaerobic occassionally. It's even a recommended routine. HIIT training involves occassional intervals of higher intensity (anaerobic) training as a way to improve cardiovasular fitness. You just don't want to be anaerobic for so long that you start to feel bad.
Jeff
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