In this case, most of the comparisons were nonsignificant, so if there are more unpublished null results floating around out there, they’d just reinforce the main finding here (and, in point of fact, there were; I also came across about a dozen studies stating that there were no significant differences between men and women in either strength or hypertrophy, but they didn’t report enough number or have figures to actually make a quantitative comparison). And for the significant differences, I don’t mind too much if they’re potentially overestimates because a) I’m very confident they’re true differences (I calculated how large of a true null would be needed to get below the significance threshold – it would take a study with anywhere from 3,000-11,000 subjects, depending on the comparison) and I’m not too hung up on the actual magnitude and b) I think the differences are probably only applicable for short-term training responses anyways (no differences in studies lasting 20+ weeks) so a misestimation of magnitude for short-term differences wouldn’t impact long-term implications to any real degree anyways.
That’s why I included the analysis of studies lasting 20+ weeks, to specifically look at studies where that sort of effect wouldn’t influence the results as much.  That’s also why I separated upper body and lower body strength gains, as I’d expect this type of effect would be more prevalent for upper body strength than lower body strength.  In support of the hypothesis that “untrained” women may be more untrained than “untrained” men – especially when it comes to upper body strength – women gained strength faster than men in shorter studies but not longer studies, and in measures of upper body strength but not lower body strength.
If you got something out of this article, I’d really appreciate it if you’d share it with your friends, your gym buddies, and anyone else who you think might benefit.  Since women are so underrepresented in strength training research, I find that this is a topic with so much misinformation swirling around.  I hope this article can serve as a small beacon of sanity.
Finally, strength training is essential for managing your body fat and maintaining a healthy body composition, and well… loving the way you look naked.  If weight loss is your goal, as you lose body fat, if you’re not strength training, it’s likely that your body will become a smaller, softer version of itself. While there’s absolutely nothing wrong with that, in our experience working with women who want to “tone up” or “get in shape,” it’s a safe bet to say this is not the physical change you were expecting to see. However, if you strength train and add muscle as you reduce your body fat, your body becomes firmer and tighter, which is more along the lines of what many women envision when they embark on a weight loss journey. As we’ve said before, there is no wrong way to have a body. However, we want you to understand the physical effects that typically take place to help you ensure that all your effort leads you toward what you envision.
The general guideline for an active individual's intake of protein is about one gram of protein per pound of bodyweight. If you weigh 135 pounds, you would aim to eat approximately 135 grams of protein. Since it's difficult to consume that much protein in two or three meals, people tend to spread it out over multiple meals and ensure that some form of protein accompanies every meal.
However, the role of testosterone may be overstated.  My friend James Kreiger recently published a super thorough analysis (note: paywall, but totally worth it) on all things testosterone and muscle growth, including analyses of cross-sectional research on people with different testosterone levels, studies comparing men and women, studies where people are given exogenous testosterone, and even studies where people were put on drugs to totally suppress testosterone production.  The main takeaway was that testosterone levels can dramatically affect the amount of muscle you start with, but they don’t really impact relative rates of muscle growth.
It’s for those reasons that I champion these diet and fitness strategies.  These are the same techniques that we’re building our foundation around in our flagship course, The Nerd Fitness Academy: we understand that all women are different, which is why we present multiple training options for multiple environments, and diet advice that allows for flexibility based on one’s situation.