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Old 03-04-2004, 10:43 PM   #10 (permalink)
Anibal5
Tilted
 
Location: Brisbane Australia
Unfortunately this thread contains much of the mis-information that abounds regarding this topic

1. MHR is calculated most simply by 220 - age. This is very simple and only a guide! Not a rule, is can be easily skewed as can the lactate inflection point or the point where you really feel like you cant maintain the effort much longer at that rate.

2. Gluconeogenesis which is the creation of sugar for energy from non-sugar building blocks i.e. fat and protein (particularly branch chain amino acids, which happen to be most commonly in skeletal muscle) can happen in a number of ways and through all levels of intensity. Eample lactic acid made in a working muscle is taken to non-working muscle and converted to sugar.

3. The 80's circa posters outlining the "zones" is very misleading. The aerobic and anaerobic metabolic activity levels are not mutally exclusive i.e. they can both be on at the same time

4. As mentioned above, your wifes fluid levels are very important. She should weigh herself before and after exercise and there should be no change. Any loss and she is not drinking enough.

5. Rhabdomyolysis is very rare where the muscle literally melts. Gluconeogenesis is very common and can be activated by simply missing a regular meal.
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