Not to be a party pooper, but if you're trying to convince a reasonably intelligent female that heavy lifting is good for her this is probably not going to be enough to do the trick. Allow me to play devil's advocate...
JNCG wrote:1) Testosterone
You just don't have enough of it. Even with weightlifting your testosterone levels just won't go high enough to get bulky.
Any female who expresses concern about getting "bulky" has
seen a woman she considers bulky and knows that she doesn't want to look that way. And everyone has their own idea of what "bulky" means: while most people on this forum would disagree, there are plenty of girls who would say the Crossfit women are too bulky. In other words, women are capable of getting bulky--it just depends on how one defines "bulky". While a female lifter won't get as big as a male lifter, her lack of testosterone will not necessarily keep her from getting bulkier than other women.
That said, lifting is great for body recomposition and when combined with a proper diet I think pretty much anyone can get the kind of figure she wants over time, whether it's leaner, or with more defined muscles, or just plain stronger.
JNCG wrote:2) Diet
I apologize for using a stereotype here but you are not going to get big if you are following some fad diet or believe in so many dieting myths like many people (especially women in my experience)
For example, Anemia (iron deficiency) is a big issue in teen girls because women are not getting enough red meat... this also means you are probably not getting enough protein.
Another one is thinking "no fat" or "low fat" is a good thing. You probably have the misconception that "any fat is bad fat". This misconception comes from studies done decades ago that found men that ate a lot of fat and cholesterol had more heart attacks. More recently studies have ruled dietary cholesterol out and most fats out. The only fats to avoid are: saturated fats and trans fats. The fact is you need good fats to build hormones like testosterone so you can build muscles. Fat does not make you fat, excess calories (even good calories) do.
I'm also going to go off on a tangent here:
If you want to loose weight from dieting the only thing that should be low is calories. Otherwise eat a healthy and balanced diet and forget about low carb/low fat/low anything else. Get educated about nutrition.
This is where girls who think a 500 calorie burger at McDonalds will make you fat but a 500 calorie salad won't. Both could make you fat or skinny depending on the *quantity* of what you eat. I'm not saying eat at McDonalds though, 500 calories of good food is going to make you a lot healthier then 500 calories of junk, but don't expect to loose weight.
If you weightlift and maintain the same diet you will loose weight purely because of calorie deficit. You will not bulk up unless you pig out.
You're right about this stuff. The main thing to emphasize here is if calories used > calories consumed then you WILL lose weight. Second, be sure to eat a balanced diet to make sure you get all necessary nutrients. That's the starting point; the rest is details and it's best to start out as simply as possible.
Fad dieting and belief in nutrition myths are not limited to women. I know guys who drink diet soda and buy only low-fat products. Just wanted to point that out because I don't think it's fair to suggest that women are somehow less informed about nutrition than their male peers. I think there are just more women than men interested in losing or maintaining their weight. Guys who decide to lose weight make a lot of the same mistakes in terms of diet.
JNCG wrote:3) Birth control
Many of you take birth control. You are essentially taking an estrogen pill once a day. This is the opposite of taking steroids! This is also why loss of sex drive is an ironic side effect of the birth control pill.
The pill is not going to make or break a woman's strength training regimen. Women who are taking the pill are perfectly capable of building muscle. Again, they will never get as big as their male counterparts, but they WILL make gains if they eat properly and follow a good routine. People seem to have a lot of complaints about the pill and I won't debate those arguments here, but when it comes to whether or not a female will "bulk up" it's pretty irrelevant. Women on the pill can and do build muscles, and how big they get is determined by how hard they work, how much they eat, etc. I can understand competitive athletes and body-builders being concerned about the estrogen in the pill, but this is not a good argument to make to the average woman.
JNCG wrote:4) Self Control
If a muscle started to get too big or if you gained 5 pounds in an area you didn't want, chances are you would do something about it. Bulky does not happen overnight... you will notice unfavourable changes and stop them. You won't bulk unless you let yourself bulk.
This is what it comes down to: any woman can add muscle and it's up to her to decide how to get where she wants to be and how to avoid getting "bulky". Weightlifting doesn't make you bulky, eating extra calories makes you bulky. But eating extra calories in conjunction with lifting also makes you stronger. So there's a delicate balance for women who want to incorporate weightlifting into a weight loss or maintenance program. I suspect that most women just don't know how weightlifting can fit in with their personal fitness goals. So I would say the best advice you can give a woman is to educate herself about nutrition and training before starting any diet or training regimen.