As always with health things, lots of misinformation going on in this thread.
Sorry, allow me to play mythbuster here:
Quote from: JS04011027 on March 21, 2012, 01:50:25 PM
Don't be the lazy couch potato. I read somewhere that exercise is good for transitioning which makes sense because the faster blood moves the faster estrogen moves. I would do a lot of cardio and an occasional light weight workout.
This makes no sense. Exercising increases your heart rate for the duration of the exercise, but it makes your body more efficient at delivering oxygen and nutrients, and so it has a net effect of
lowering your pulse.
Quote from: A on March 22, 2012, 11:04:36 AM
Anyway, it may not be optimal at all for your health, but if you want to maximize muscle loss, avoid exercise altogether. If you do exercise and it burns your muscles as energy, it means you are past the point where there is practically no fat to burn anymore... Which means, zero curves or breasts. And unless your genetics naturally make you super skinny, as in, fat is hard to find at all, as soon as exercise burns muscle, I'm pretty sure you're past a danger line where you put a burden on your global health.
You see, exercise needs muscles. The body won't burn muscles for exercise energy unless it's in serious lack of nutrients. It would be its last resort, just before making you faint.
If you do exercise and it burns your muscles as energy, it means you are past the point where there is practically no fat to burn anymore... Which means, zero curves or breasts.
That's not how it works. Different types of exercise need different amounts of different fuels.
In exercise, the body relies mainly on a balance of muscle glycogen and fat oxidization for energy. That's why exercise is categorized as aerobic or anaerobic. Anaerobic is more intense exercise that relies mostly on stored muscle glycogen. Aerobic is lower intensity exercise that relies more on fat oxidization.
In anaerobic exercise, the intensity is simply too high to burn mainly fat. It's a more difficult process to extract energy from fat and most importantly, it needs oxygen. So instead, the body is forced to get its energy mainly from muscle glycogen. When muscle glycogen runs out, the body must catabolize (break down) the muscle tissue for energy. This does not mean there's "no fat." It would be a dieter's dream if exercising always only burnt 100% fat first.
Losing muscle happens when muscle catabolism outweighs muscle anabolism (putting on muscle). For muscle anabolism to happen, the body needs a) protein and b) glucose. Glucose in the diet triggers insulin secretion which increases protein uptake. The protein is used to repair and add new muscle fibers. The glucose is used to replenish muscle glycogen stores. Fructose (fruit sugar) can't be used to replenish muscle glycogen stores.
So, in short, to lose muscle, you need to:
-Do long-lasting, high-intensity cardio. It needs to be long enough to exhaust muscle glycogen and begin catabolizing muscle.
-Eat a diet that is moderately low in protein and is also low in
high GI carbs. So whole wheat, not white. Fruits, not sweets. Etc.
Note that
a muscle loss diet is very similar to a fat loss diet. The only major difference is the kind of exercise you should be doing and how long you should be doing it for. And yes, you do need an overall caloric restriction to lose any kind of mass. By caloric restriction, I mean taking in less energy than you burn. You don't necessarily have to eat less since you'd be burning so much through exercise. It just depends on the actual amounts you usually eat.
Quote from: Kitty_Babe on March 22, 2012, 12:40:37 PM
My suggestion ? don't eat LESS eat normal portions of food, avoid high protein - high fat, meals,
This is a really common misnomer and allow me to point it out: fat is not the problem. High fat meals do not magically make you bigger in either the fat sense or the muscle sense. A low-fat diet is not useful for any purpose and it's simply not healthy. Getting the right types of fats is important, sure. But avoiding fat altogether is a very bad idea.
Quote from: rachl on March 22, 2012, 12:04:03 PM
This is false. Light weights with high reps will streamline muscles and 'tone' rather than 'build.' It's about promoting the slow-twitch fibres rather than the fast-twitch ones. It's why runners have skinny legs: they're effectively doing (ultra) high rep, low weight resistance training on their legs. So you can do the same for your arms. We're talking 30-40 reps, and about getting a light burn.
Toning has nothing to do with the shape of the muscles. Becoming "toned" just means having lower bodyfat so the muscles become more visible.
Runners have skinny legs because they burn massive amounts of energy in endurance runs and they naturally have a calorie deficit and lose weight (both muscle and fat) until their body is light enough that they burn less energy and can recover it all through eating.
Quote from: A on March 22, 2012, 12:52:29 PM
I want to second that. Meat, especially, is globally hurtful on your health
Another misnomer, there's nothing about meat that makes it inherently harmful to health. Like you said, it's just protein. And it's high-quality protein too (it has all the essential amino acids).
Meat (and especially red meat) usually becomes unhealthy as a result of factory-farmed animals being fed a diet of grain or corn. This makes the animals unhealthy and that carries over to the meat, skewing the meat's fat profile to be unusally low in omega-3 fatty acids. Red meat raised on a healthy diet is perfectly healthy though, especially because most people do not get enough omega-3 fat in their diets these days.
Vitamin b12 is also hard to get from anything other than meat, so skipping meat and dairy will cause you to be deficient if you don't supplement b12.