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TOPIC: Regaining_motivation_again_and_again_and_again__Whats_your_Motivation
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VaBeach - I was both right and wrong. LOL Thank you for making me look.

"Under aerobic conditions, the dominant product in most tissues is pyruvate and the pathway is known as aerobic glycolysis. When oxygen is depleted, as for instance during prolonged vigorous exercise, the dominant glycolytic product in many tissues is lactate and the process is known as anaerobic glycolysis. Given that erythrocytes lack mitochondria, they cannot completely oxidize glucose-derived pyruvate and instead reduce the pyruvate to lactate which enters the blood for delivery to the liver where it is used for glucose synthesis via gluconeogenesis." "Aerobic glycolysis generates substantially more ATP per mole of glucose oxidized than does anaerobic glycolysis. The utility of anaerobic glycolysis, to a muscle cell when it needs large amounts of energy, stems from the fact that the rate of ATP production from glycolysis is approximately 100X faster than from oxidative phosphorylation. During exertion muscle cells do not need to energize anabolic reaction pathways. The requirement is to generate the maximum amount of ATP, for muscle contraction, in the shortest time frame. This is why muscle cells derive almost all of the ATP consumed during exertion from anaerobic glycolysis"

Fatty Aid Oxidation During a Single Bout of Exercise At the start of exercise blood flow increases to adipose tissue and muscle (Horowitz and Klein, 2000). This allows for increased fatty acid release from adipose tissue and fatty acid delivery to the muscle. Exercise intensity has a great impact on fat oxidation. Maximal fat oxidation occurs at low to moderate intensity (between 25% and 60% of maximal oxygen consumption (VO2max) (Horowitz & Klein 2000). At lower exercise intensities, most of the fatty acids used during exercise come from the blood (Horowitz & Klein 2000). As exercise increases to moderate intensity (around 60% of VO2max) the majority of fatty acids oxidized appear to come from IMTAG (Horowitz and Klein, 2000). At higher exercise intensities (>70 % VO2max), total fat oxidation is reduced to levels lower than that of moderate intensity (Horowitz and Klein, 2000). This reduced rate of fatty acid oxidation is coupled with an increase in carbohydrate breakdown to meet the energy demands of the exercise (Horowitz & Klein, 2000

Protein metabolism under aerobic conditions Although protein breakdown is not a preferred source for energy, it can be used to resynthesize ATP under aerobic conditions. Protein metabolism occurs exclusively in the mitochondria; the first step constitutes the deamination of amino acids in the liver and skeletal muscle. The deaminated products are converted into pyruvate or acetyl-CoA depending on the identity of the amino acid, and some enter the citric acid cycle directly and generate hydrogens (NADH and FADH2) under aerobic conditions and ATP via the electron transport chain. Amino acids like threonine, serine, cysteine and glycine are glucogenic because are converted into pyruvate and then into acetyl-CoA, which then enters the citric acid cycle. Other amino acids like isoleucine, leucine, lysine, tyrosine, phenylalanine and tryptophan are ketogenic because they are transformed into acetyl-CoA to enter the citric acid cycle. The last class of amino acids, arginine, glutamine, tyrosine, among many others, enter the citric acid cycle directly. Glucogenic amino acids can contribute in gluconeogenesis (glucose synthesis) during prolonged exercise. While, ketogenic amino acids, cannot be used to synthesize glucose, rather they synthesize triacylglycerol.

Vestal NY
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"Lactic acid production means you're no longer burning fat or sugar, but burning muscle mass."

This is not true, Tiffany. Lactic acid produced during hard exercise is the result of a buildup of pyruvic acid (the end result of glycolysis - sugar burning) faster than the aerobic Krebs cycle can consume it. As a result, pyruvic acid is reduced to lactic acid, which then accumulates. The lactic acid will persist until it is converted in the liver back into pyruvic acid via the Cori cycle.

Glycolysis does not require oxygen, which is why your body can use it under emergency conditions (such as sprinting), but only for so long. The Krebs cycle requires oxygen and is comparatively slower. So the glycolysis end products accumulate until the person rests enough for the body to clear them through the Krebs cycle (and beyond).

Windermere FL
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NCal - No. You're just building lactic acid tolerance. Lactic acid production means you're no longer burning fat or sugar, but burning muscle mass. That's week 2 in Exercise Physiology (Which happens to be my degree, along with cardiac rehab).

But hey, have at it. But I'd guess you'd be able to eat a more balanced diet and have a lot less to prove in those dives if you listened to trained individuals than making incorrect assumptions on your personal empirical evidence.

Vestal NY
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Tiffany your research is flawed. First I am not doing a steady paced swim. I am doing intense dive to the bottom and then shooting fish and then trying to get that fish under control. Resting for a few minutes and doing it again. My heart is beating fast and I am breathing hard by the time I have that fish on the stringer.

Its this intense exercise in cold water that burns body fat at a very fast rate.

Las Vegas NV
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"Making any general pronouncements on only self-gathered evidence about your self is flawed. You would do much better to say "This is what works for me". But, I think you rather enjoy sounding like a pompous ass."

ding ding ding! we HAVE a winner!!!!

Bridgewater NJ
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Because I can. LOL

NCal. Our Irish boy has done some research. He's pretty spot on. Add that because of a reflex similar to the mammalian reflex in slowing heart rate down in cold water, swimmers naturally retain more body fat than non-swimmers. And the colder the water is you swim in, the more fat your body will attempt to retain. The stress of forcing it to not retain said fat can and will cause damage. Just because you burn more calories in a colder environment doesn't mean your body won't attempt to shield itself from said cold environment by adding superficial and deep tissue fat.

As for what you eat to lose weight, gain muscle mass, etc., some people do much better on a low call, high fiber diet while others do better on moderate cal, high protein diet and yet others do well on moderate cal, well balanced diet.

Making any general pronouncements on only self-gathered evidence about your self is flawed. You would do much better to say "This is what works for me". But, I think you rather enjoy sounding like a pompous ass.

Vestal NY
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Hey, whatever motivates you, even a little logical insanity helps sometimes if the results are the same.

I certainly don't claim to be a specialist in wetsuits, physics, or biology, but everyone who learns anything learned it from someone or something else, and no search result will return a copy/paste of my posts, nor do I intend to cite every more knowledgeable author out there, who are all smarter than both of us :P

Omaha NE
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And then the physical strength need to pull back those bands on the speargun..time and time again....and wrestling big fish that you speared.

Las Vegas NV
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LOL good cut and paste. but the water that is warmed by my body in a wetsuit does not just stay there it leaks out as the cold water leaks in. Its just very slow. When diving one has to pee in their wetsuit, cant take it off because when it wet you can never get it back on. The warmth from the pee only lasts a few minutes before the cold water washes it all away. All fluids are moved from the inside of the wetsuit to the outside slowly and constantly.

Las Vegas NV
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While I admit I haven't been diving in a while, I do still have my SCUBA license. Regardless of that, you don't 'keep' the water warm, the water keeps you warm by acting as a barrier, an additional layer of insulation within the suit against your body heat. Once it's warm the water is essentially in equilibrium, you would actually burn less calories with the wetsuit on because you don't have to produce as much heat to stay warm, if that was actually how things worked, which they don't.

The potassium is lost as a result of sweating it out, which is also a sign of dehydration, the two aren't mutually exclusive, nor is potassium used up by your muscles, it maintains cellular fluid balance, which contributes to muscle cramping when those fluids are lost.

Omaha NE
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TOPIC: Regaining motivation again and again and again Whats your Motivation
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