Evidence-Based Fitness for Women: Training Principles, Hormones, and Practical Protocols

This episode of the Huberman Lab podcast features Dr. Lauren Colenso-Semple, an expert in integrative physiology and strength and conditioning, to debunk common myths surrounding women's fitness. The core argument is that men and women respond remarkably similarly to exercise, particularly resistance training, at the cellular and physiological levels. While men typically have higher baseline muscle mass due to testosterone surges during puberty, once training commences, both sexes gain similar relative size. The narrative that women require sex-specific programs, nutrient timing, or unique intensity/rep ranges is largely unsupported by data and often serves to create a false sense of specialized consideration, rather than being based on scientific necessity.\n\nA key distinction made is between normal physiological hormone levels and supraphysiological levels. Within the normal range, an individual's testosterone level (for either sex) does not predict their response to resistance training. However, exogenous, supraphysiological levels of hormones, such as those used in competitive bodybuilding, can dramatically alter muscularity. The discussion also clarifies that acute post-exercise hormonal surges (e.g., testosterone, growth hormone) are not the long-term drivers of hypertrophy, rendering training styles designed solely to maximize these acute responses largely ineffective for sustained growth.\n\nPractical insights for women's training emphasize a full-body approach, 2-3 times per week, targeting all major muscle groups. The importance of training close to muscular failure (1-2 reps shy) with appropriate loads and progressive overload is highlighted. For time efficiency, agonist-antagonist supersets are recommended. The episode also addresses the cultural shift in women's perception of weightlifting, moving away from fears of "getting bulky" (a rare outcome without extreme effort and often pharmacological aid) towards embracing strength training for its aesthetic and health benefits. It's stressed that resistance training is beneficial at any age, including for young girls, and serves as a crucial "muscle savings account" to combat age-related muscle loss.\n\nBroader implications include the need to shift the narrative around exercise for women from solely weight loss to muscle growth and overall health. The episode underscores the value of evidence-based information in navigating the often-conflicting advice found online. It also touches on how life stages like menopause and factors like birth control have minimal impact on fundamental training principles, reinforcing the idea that effective training protocols are largely universal, focusing on consistent, progressive challenge to the musculature for optimal adaptation and long-term well-being.

The narrative that women need a sexspecific program or nutrient timing guidance or a particular intensity of exercise or rep range or all of it. It makes women feel like they're being spoken to and being considered and then they're part of this community instead of oh, you know, just do what your boyfriend does or what your husband does or so the narrative is very much women are not men. And so obviously women need something different.

The data says men and women respond to exercise very similarly.

The major difference and this is hormone related is that the baseline muscularity because during puberty when men experience a surge in testosterone that coincides with an increase in muscle mass.

However, once they start training, they will gain similar relative size.

As long as you're within what that wide normal range there doesn't seem to be a predictability of your response to training.

But what we know now is that response, although acutely, it's not the driver of growth long term. And so it it doesn't really make sense to chase that short-term response because it's not predictive of longer term adaptation.

Clearly no one is getting huge by accident. you're not getting extremely muscular without working really really hard and often incorporating some pharmacological help.

It's not that it's ever too late to start, but if we start earlier, we are building muscle in the way that you're building a savings account or a retirement account.

Historically, I think women have been told that exercise is for weight loss. And so, it's really important that we start to shift that narrative because resistance training isn't about being smaller. It's not about the number on the scale. So, we want to think about getting bigger, about growing muscle.

We should move the weight as quickly as we can during that difficult phase and then control on the easier phase.