Dr. Matt and Dr. Mike's Medical Podcast Exercise Physiology | Fuel Sources (Part 3)
Mar 15, 2025
Discover the science of exercise intensity and how it impacts energy production. Learn about VO2 max, lactate threshold, and the dynamic relationship between carbs, fats, and proteins during workouts. Unravel the mystery of lactate, not just as a waste but a valuable energy source. Explore how the body shifts from fat to glucose as exercise intensifies, and gain insights into optimal training strategies. Join the engaging discussion that balances informative content with actionable fitness tips!
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Understanding VO2 Max
- VO2 max measures the body's maximal ability to transport and use oxygen during exercise.
- It reflects cardiovascular, respiratory, and muscular efficiency and is trainable beyond genetic limits.
Immediate ATP at Exercise Onset
- The body relies on anaerobic systems (phosphocreatine and glycolysis) to produce ATP immediately at exercise onset.
- Aerobic metabolism lags due to physiological adjustments, causing an oxygen deficit early in exercise.
Excess Post-Exercise Oxygen Consumption
- After stopping exercise, oxygen consumption remains elevated due to excess post-exercise oxygen consumption (EPOC).
- EPOC replenishes ATP stores and supports systemic recovery processes including lactate metabolism.