Essentials: How to Exercise for Strength Gains & Hormone Optimization | Dr. Duncan French
Dr. Duncan French, VP of Performance at the UFC Performance Institute, discusses how resistance training and acute stress impact hormones like testosterone. He outlines specific weight training and nutrition protocols for strength, hypertrophy, and metabolic flexibility, alongside strategic use of cold and heat exposure for recovery and performance.
Deep Dive Analysis
13 Topic Outline
Introduction to Resistance Training and Hormones
How Weight Training Impacts Testosterone in Men and Women
Optimizing Resistance Training for Testosterone Release
Importance of Rest Periods and Metabolic Stress in Training
Structuring Weekly Training for Progress and Recovery
Impact of Short-Term Stress on Testosterone and Performance
Understanding Deliberate Cold Exposure for Recovery
Strategic Periodization of Cold Exposure
Optimizing Skill Training and Managing Mental Fatigue
Fueling High-Intensity Training with Carbohydrates
Achieving Metabolic Efficiency Through Nutrition Periodization
Principles and Benefits of Heat Adaptation
Long-Term Adaptation and Program Duration
6 Key Concepts
Mechanical and Metabolic Stress
These are the primary drivers for testosterone release during resistance training. Mechanical stress refers to the load on the muscles, while metabolic stress is generated by the volume of work, leading to lactate buildup and glycogen breakdown.
Anabolic Environment
This refers to the internal physiological state that promotes tissue growth and repair, such as muscle hypertrophy and strengthening of tendons, ligaments, and bone. It is significantly influenced by anabolic hormones like testosterone.
Metabolic Stimulus in Training
This is the physiological challenge induced by training, particularly with shorter rest periods and higher volume. It drives processes like lactate production and glycogenolysis, which are crucial for muscle growth and adaptation.
Periodization of Cold Exposure
A strategic approach to using deliberate cold exposure for recovery. It involves timing cold exposure to specific training phases, such as avoiding it during muscle growth phases (to allow inflammatory responses) and utilizing it during competition phases (to reduce inflammation and maintain quality of execution).
Metabolic Efficiency
The body's trained ability to efficiently switch between fuel sources, primarily using fats at lower exercise intensities and carbohydrates for high-intensity efforts. This prevents premature exhaustion of carbohydrate stores and optimizes sustained performance.
Adaptation-Led Programming
A training philosophy that emphasizes understanding and strategically applying various stimuli (like exercise, nutrition, and temperature exposure) to drive specific physiological adaptations. It focuses on the 'whens, whys, and whereofs' of overload to achieve desired changes in the body.
10 Questions Answered
Weight training acts as a stress response, involving both mechanical stress from heavy loads and metabolic stress from volume, which signals the endocrine system to release testosterone from the adrenals and gonads.
Testosterone has widespread effects beyond muscle, influencing the growth and adaptation of ligaments, tendons, bone, and even neural tissue due to the presence of androgen receptors throughout the body.
A protocol involving high intensity (around 80% of a 1-repetition max) combined with significant volume (e.g., 6 sets of 10 repetitions) and relatively short rest periods (2-3 minutes) is highly effective for driving anabolic environments and testosterone release.
Yes, acute, short-term stressors can lead to a temporary increase in stress hormones, such as epinephrine and noradrenaline, which can in turn promote the release of testosterone.
Cold exposure should be periodized; it's best avoided during phases focused on muscle growth and adaptation (as it can blunt beneficial inflammatory responses) and reserved for competition phases where maintaining performance quality and reducing inflammation are priorities.
Skill training should prioritize quality over quantity, focusing on shorter, high-quality sessions that rehearse accurate movement mechanics. Training should stop as soon as fatigue begins to impact the accuracy of movement to ensure effective motor learning.
A strictly ketogenic diet is generally not advocated for high-intensity intermittent sports like MMA because these efforts require carbohydrate fueling. While metabolic efficiency is important, complete carbohydrate restriction can hinder peak performance.
Metabolic efficiency can be improved by strategically manipulating diet and exercise to train the body to preferentially use fats at lower intensities and carbohydrates at higher intensities, often through timed carbohydrate exposure around training sessions.
Heat adaptation is achieved through consistent, deliberate exposure, starting with shorter durations (e.g., 15 minutes) and gradually increasing to 30-45 minutes continuously. This process, ideally involving about 14 exposures over 8-10 weeks, enhances the body's ability to sweat and cool itself.
For most physiological adaptations to a new training or overload stimulus, whether beneficial or detrimental, a period of about three months (12 weeks) is generally sufficient to observe significant progression or regression.
10 Actionable Insights
1. Maximize Testosterone & Muscle Growth
To maximize testosterone release and muscle growth, perform multi-joint exercises like back squats for 6 sets of 10 repetitions at 80% of your one-repetition max, ensuring you can sustain 10 reps by adjusting the load if needed. Rest for 2 minutes between sets to create metabolic stress and drive anabolic environments.
2. Vary Weekly Training Stimulus
For general fitness, perform intense, testosterone-boosting workouts (e.g., 6x10 at 80% 1RM with 2 min rest) twice a week. On other days, vary your workouts by either emphasizing higher volume with reduced intensity (12-20 reps) or reducing volume while increasing intensity to drive different physiological adaptations.
3. Periodize Cold Exposure Strategically
Avoid ice baths or cold exposure during periods focused on muscle growth (general preparatory work) as it can dampen the mTOR pathway and hypertrophic signaling. Instead, use cold exposure during competition phases to enhance recovery and maintain quality of skill execution, as muscle building should already be achieved.
4. Optimize Skill Acquisition Training
Focus on quality over quantity for skill acquisition. Keep training sessions shorter (e.g., 90 minutes over 3 hours) and stop as soon as fatigue impacts accurate movement mechanics, as continued training with poor form hinders motor learning.
5. Periodize Carbohydrate Intake
Implement a periodized nutrition strategy by consuming carbohydrates immediately before, during, and after high-intensity training sessions to fuel performance. For the rest of the day (breakfast, lunch, dinner), adopt a largely ketogenic approach to train your body to preferentially use fat at lower intensities and improve metabolic efficiency.
6. Acclimate to Heat Gradually
To improve heat tolerance and sweat rates, begin with 15-minute sauna exposures (e.g., 200°F), gradually increasing duration to 30-45 minutes continuously. Aim for around 14 sauna exposures over 8-10 weeks to drive significant physiological adaptations.
7. Leverage Short-Term Stress
Short-term stress, especially when anticipated and voluntarily engaged with (e.g., a challenging workout or parachute jump), can acutely increase stress hormones like epinephrine and norepinephrine, which can lead to a temporary increase in testosterone and enhanced physical performance. Preparing mentally for a stressor can also improve performance.
8. Prioritize Rest in Training
Recognize that rest is as crucial a programming variable as load and intensity. Shorter rest periods (e.g., 2 minutes) between sets can increase metabolic stimulus, leading to greater muscle gains, while longer rest periods reduce metabolic stress by allowing waste product removal.
9. Test Protocols for 12 Weeks
When experimenting with new training regimens, diets, or recovery methods, commit to a 12-week (three-month) period. This duration is generally sufficient to observe physiological adaptations, whether beneficial or detrimental, and understand how your body responds.
10. Monitor Your Body’s Response
Be a ’thinking man’s athlete’ by consciously understanding your body’s state at all times. Keep a journal or log of your training, feelings, mood, and sleep to track individual responses and optimize your approach.
5 Key Quotes
The body is, you know, as an organism, as an organic system, it's hugely adaptable. It's hugely plastic.
Duncan French
The rest is as important a programming variable as the load and the intensity, the load, the volume, et cetera.
Duncan French
So, yeah, it's a magic hormone, let's say, with many end impacts in terms of adaptation.
Duncan French
But the best athletes, the true elite levels are the ones that can do it again and again and again on a daily basis and sustain a technical output for skill development.
Duncan French
If you are using the stress specifically to manage the mindset, to use it as a specific stress stimulus, that's the same as me doing 6 by 10, 80%.
Duncan French
4 Protocols
Resistance Training Protocol for Testosterone Release
Duncan French- Perform 6 sets of 10 repetitions of a multi-joint exercise (e.g., back squat).
- Use a load that is approximately 80% of your 1-repetition maximum intensity.
- Rest for 2 minutes between each set.
- Adjust the load as needed to ensure all 10 repetitions can be completed for each set, prioritizing sustained repetitions.
Cold Exposure Periodization for Recovery
Duncan French- During Muscle Growth/General Preparatory Phases: Avoid using cold exposure (e.g., ice baths) for recovery, as it can interfere with the body's natural inflammatory and hypertrophic signaling pathways necessary for muscle adaptation.
- During Competition Phases: Strategically use cold exposure as a recovery intervention to reduce inflammation and optimize the body for maintaining quality of execution and performance, as muscle building should have already occurred.
Nutrition Periodization for Metabolic Efficiency
Duncan French- General Diet: Maintain a diet that is largely reduced in carbohydrates, resembling a ketogenic approach, for day-to-day living and lower-intensity activities.
- Around Training Sessions: Consume carbohydrates immediately before, during, and immediately after high-intensity training sessions to fuel performance and maximize intensity.
- Goal: Train the body to preferentially utilize fat stores at lower intensities and carbohydrate stores at higher intensities, thereby enhancing overall metabolic efficiency.
Heat Acclimation Strategy
Duncan French- Begin with approximately 15 minutes of heat exposure in a hot sauna (around 200°F); for those with low acclimation, break this into shorter 3-5 minute efforts with breaks.
- Gradually increase the duration of continuous sauna exposure, aiming to work up to 30-45 minutes per session.
- Implement this strategy over 8-10 weeks, aiming for about 14 sauna exposures in total, to drive significant adaptations in sweat rate and heat tolerance.