Podcast Summary: "The Diary Of A CEO with Steven Bartlett"

Episode Title: The Exercise & Nutrition Scientist: The Truth About Exercising On Your Period! Women Were Right About Menopause! These 4 Supplements Give Women Optimal Health!
Guest: Dr. Stacey Sims, Exercise Physiologist and Nutrition Scientist
Release Date: January 6, 2025

Introduction

In this insightful episode of "The Diary Of A CEO," host Steven Bartlett engages in a comprehensive discussion with Dr. Stacey Sims, a renowned exercise physiologist and nutrition scientist. Dr. Sims brings her extensive research and expertise to explore the unique physiological differences between men and women, particularly focusing on exercise, nutrition, and hormonal changes throughout a woman's life cycle.

The Importance of Sex Differences in Exercise and Nutrition (00:52 - 04:04)

Dr. Sims emphasizes the critical need to recognize and understand the physiological differences between men and women, especially in the realms of exercise and nutrition. She points out that most exercise protocols and nutritional guidelines are based on male data, neglecting the distinct hormonal profiles women experience during puberty, reproductive years, and menopause.

Dr. Stacey Sims (00:52): "When we think about everything that we know for protocols from training to eating recovery, it's based on male data and women have been generalized to that data."

The Q Angle and ACL Injuries (15:05 - 28:31)

A significant portion of the conversation delves into the "Q angle," which refers to the angle between the hip and knee. Dr. Sims explains how wider hips in women lead to a greater Q angle, affecting running mechanics and increasing the risk of ACL injuries. She highlights that women are three to four times more likely to suffer ACL tears compared to men.

Dr. Stacey Sims (23:34): "So when we're looking at that, as well as the quad dominance, that develops for women... unless we're really trying to train hamstrings and glutes to fire, which isn't the default for women's bodies... it predisposes people to severe ACL injury."

Dr. Sims also discusses preventive measures, such as strengthening the posterior chain and incorporating lateral movements into training to mitigate this risk.

Nutritional Needs: Fasting, Supplements, and Diet (33:31 - 66:29)

Fasting: Dr. Sims critiques the popular practice of fasting, particularly the "warrior fast," highlighting that while it may benefit men, it can lead to adverse effects in women, such as increased muscle loss and disrupted hormonal balance.

Dr. Stacey Sims (33:31): "For women, when we look at the data and if we were to do a warrior fast... they end up with less blood sugar control, we have higher resting blood glucose, we have more fat storage, we have more sympathetic drive."

Supplements:

1. Creatine: Contrary to popular belief that creatine is only for bodybuilders, Dr. Sims recommends it for women at a lower dosage without the loading phase typically suggested for men.

   Dr. Stacey Sims (65:00): "So women who are looking for health and performance benefits, you don't have to do a loading strategy, you just have to do that three to five grams a day."

2. Vitamin D: Essential for bone health and overall bodily functions, especially for those in regions with limited sunlight.

   Dr. Stacey Sims (66:29): "If we're improving the amount of vitamin D3 that we're taking in... Way better recovery, we have better muscle function, we have better brain health."

3. Omega-3 Fatty Acids: Beneficial for reducing inflammation and supporting cellular integrity, particularly during perimenopause.

   Dr. Stacey Sims (66:31): "Especially as we get into peri and postmenopause, we want to look at how inflammation affects the cells."

4. Iron: Crucial for women, especially those who are menstruating, to prevent fatigue and maintain oxygen-carrying capacity.

   Dr. Stacey Sims (69:02): "Iron is responsible for those heme groups that... carry oxygen. If we have low iron, then we don't have enough oxygen circulating throughout the body or being used by the body."

Diet: Dr. Sims advises against restrictive diets like keto for women due to their impact on the gut microbiome and overall hormonal balance. Instead, she recommends a balanced intake of colorful fruits and vegetables to support gut health and hormone metabolism.

The Hypothalamus and Calorie Metabolism in Men vs Women (33:41 - 41:08)

Dr. Sims explains the role of the hypothalamus as the body's control center for appetite, temperature, and hormonal balance. She highlights how women and men respond differently to calorie intake and fasting due to the hypothalamus's sensitivity.

Dr. Stacey Sims (36:37): "So the hypothalamus is an area in the brain and it's sensing... It's the control center for the most part."

For women, the hypothalamus is more attuned to nutrient density, leading to different responses to fasting and calorie restriction compared to men. This heightened sensitivity can result in muscle loss and metabolic dysfunction if not properly managed.

Menstrual Cycle and Its Impact on Training and Nutrition (74:55 - 85:19)

Dr. Sims provides a detailed analysis of how different phases of the menstrual cycle affect a woman's training and nutritional needs:

1. Follicular Phase (Day 1-13):

   • Low Hormone Phase (Day 1-6): Ideal for high-intensity training as the body is more responsive to stress.
   • High Hormone Phase (Day 7-13): Increased insulin sensitivity and muscle protein synthesis, benefiting strength and power training.

   Dr. Stacey Sims (80:12): "If we're looking at the low hormone phase... we're really responsive to stress."

2. Luteal Phase (Day 14-28):

   • Post-Ovulation (Day 14 onwards): Increased progesterone leads to insulin resistance and a shift towards fat storage. Emphasizes the need for balanced carbohydrate intake and reduced high-intensity workouts.

   Dr. Stacey Sims (77:50): "After ovulation, we have a change in our core temperature... our heat tolerance isn't as great."

Dr. Sims recommends women track their perceived exertion and adapt their training intensity accordingly to optimize performance and prevent overtraining.

Perimenopause and Menopause: Effects on Health and Training (96:01 - 116:35)

Perimenopause: Typically starting in the mid-30s, perimenopause involves fluctuating hormone levels that can affect metabolism, bone density, and overall health. Symptoms include weight gain, disrupted sleep, and increased insulin resistance.

Dr. Stacey Sims (105:29): "We see a peak velocity or peak bone mass hitting around the time we're 20ish, and then we'll start to degrade it."

Menopause: Officially occurring around age 52 on average, menopause leads to a significant decline in estrogen and progesterone, impacting bone health, cognitive function, and metabolic processes. Dr. Sims emphasizes the importance of maintaining muscle mass and bone density through resistance training and adequate protein intake.

Dr. Stacey Sims (107:37): "Resistance training is key for mobilizing abdominal fat and for creating more lean mass and also increasing the amount of crosstalk between their skeletal muscle and our stored fat."

Exercise Recommendations:

• High-Intensity Workouts: To improve insulin sensitivity and muscle mass.
• Resistance Training: Essential for bone health and maintaining lean muscle.
• Sauna and Cold Therapy: Helps manage hot flashes and reduce inflammation.

Dr. Stacey Sims (108:27): "We see that women who go into the sauna get better control over things like hot flashes because it's all about temperature control."

Supplements: Creatine, Vitamin D, Omega-3, Iron (Repeated as covered in Nutritional Needs)

Dr. Sims reiterates the importance of tailored supplement strategies for women, emphasizing that standard dosages based on male physiology may not be appropriate.

Cold Plunge and Sauna Differences (57:15 - 60:13)

Dr. Sims discusses how women respond differently to cold plunges and saunas compared to men due to differences in fat distribution and thermoregulation.

Dr. Stacey Sims (57:15): "Women should be near 15 degrees Celsius for cold plunges compared to 0-4 degrees for men to achieve similar physiological responses."

For saunas, women require longer exposure times to achieve the same cardiovascular adaptations as men.

Dr. Stacey Sims (60:13): "Women can spend more time in the heat before they start to get changes in their hormone responses and blood volume adaptations."

Conclusion and Final Thoughts (116:35 - End)

Dr. Sims underscores the importance of recognizing and addressing the unique physiological needs of women in exercise and nutrition. She advocates for greater awareness and education to empower women to optimize their health and performance throughout different life stages.

Dr. Stacey Sims (117:23): "This conversation isn't just for women... it's for everybody, because if we're going to push forward and understand how we need to do research to improve the health of women and men, then it's a combination in the conversation."

Steven Bartlett echoes Dr. Sims's sentiments, highlighting the newfound understanding and improved communication between partners regarding women's health and physiology.

Notable Quotes

• Dr. Stacey Sims (00:52): "When we think about everything that we know for protocols from training to eating recovery, it's based on male data and women have been generalized to that data."

• Dr. Stacey Sims (23:34): "If we're able to balance it from being front loaded to being more even loaded, it comes down to, you know how we were talking about distribution of forces through the knee with men being more linear and women having an angle? Well, if we're able to take that angle and we can evenly distribute the load between the muscles of the hamstring and the quads of the front and the back."

• Dr. Stacey Sims (37:05): "If a woman comes to me and is like, I wanna lose weight... you're burning through your lean mass."

• Dr. Stacey Sims (57:15): "Women should be near 15 degrees Celsius for cold plunges compared to 0-4 degrees for men to achieve similar physiological responses."

• Dr. Stacey Sims (117:23): "This conversation isn't just for women... it's for everybody, because if we're going to push forward and understand how we need to do research to improve the health of women and men, then it's a combination in the conversation."

Key Takeaways

1. Sex Differences Matter: Exercise and nutrition protocols must consider physiological differences between men and women to optimize health and performance.
2. Menstrual Cycle Impacts: Understanding the menstrual cycle can enhance training effectiveness and prevent overtraining in women.
3. Supplements Should Be Gender-Tailored: Women benefit from different supplement dosages and types compared to men.
4. Menopause Awareness: Increased awareness and education on menopause can improve quality of life and health outcomes for women.
5. Holistic Approach: Empowering women with knowledge about their unique physiology leads to better health, stronger relationships, and optimized performance.

Resources Mentioned:

• Dr. Stacey Sims's Books:
  • Raw: Match Your Food and Fitness to Your Unique Female Physiology for Optimal Performance, Great Health, and a Strong Body for Life
  • Next Level: Your Guide to Kicking Ass, Feeling Great, and Crushing Goals Through Menopause and Beyond

Note: For further insights and detailed research, listeners are encouraged to explore Dr. Stacey Sims's published works and follow her on Instagram and LinkedIn.