Essentials: How to Build Strength, Muscle Size & Endurance | Dr. Andy Galpin

Exercise training is a tool to drive a variety of physical adaptations, each with its own methodologies and considerations. Andy Galpin outlines nine main adaptations that can be targeted through exercise, and explains the importance of tailoring workout variables to a specific training goal to maximize results.

9 Main Adaptations Targeted Through Exercise

Galpin identifies nine principal adaptations resulting from exercise:

1. Skill: This encompasses improvements in coordination and mechanics, such as perfecting a golf swing, optimizing squat technique, or refining running form—essentially, moving the body efficiently and correctly.
2. Speed: Focused on moving as fast as possible.
3. Power: Defined as strength multiplied by speed; power development shares similarities with strength and speed training but has distinct requirements.
4. Strength: The capacity to move maximal loads; strength training lays the foundation for power and complements other adaptations.
5. Hypertrophy: Increasing muscle size or mass; the primary goal is growing muscle tissue.
6. Muscular Endurance: The ability to perform repeated muscle actions, such as the number of pushups in a minute.
7. Anaerobic Power: The capacity to generate high effort for short periods (about 30 seconds to 2 minutes), emphasizing energy systems over localized muscle endurance.
8. Cardiovascular Endurance (VO2 Max): Ability to sustain high effort for 3–12 minutes, focusing on heart and lung capacity rather than just muscle.
9. Long-Duration Endurance: The capacity to continue working for extended periods (30+ minutes) without breaks, regardless of speed.

Galpin notes that while some adaptations complement each other, others may be mutually exclusive—prioritizing one often means sacrificing progress in another.

Training Goal Guides Workout Variable Manipulation

The optimal manipulation of key workout variables—such as intensity, volume, frequency, recovery, and intentionality—depends on the specific adaptation desired. Galpin emphasizes that training frequency is vital across most adaptations, recommending a "less sore, more frequent" approach for sustaining progress without compromising recovery.

Strength Training Uses High-Intensity, Low-rep Work to Recruit Motor Units

Strength development relies on high-intensity, low-repetition work that targets maximal recruitment of motor units. Frequent training is possible because strength workouts generally cause less muscle soreness, allowing multiple sessions per week, even on consecutive days for the same muscle group. High intent is crucial: attempting to move weights as fast and forcefully as possible, even if the bar speed doesn’t change, leads to greater neural adaptations and improvements in strength and power. Galpin highlights that the quality of effort—striving to maximize performance rather than merely completing the task—makes a significant difference.

The idea extends to power and speed training: it’s not just about moving at a certain speed, but the underlying intent to move explosively each rep. This mindset optimizes nerve and muscle adaptation.

For those wanting to get stronger without increasing muscle size, careful adjustment of variables makes this possible, as demonstrated by weight-class athletes who continue to break strength records without gaining weight.

Hypertrophy Training: Various Rep Schemes, Volume, and Metabolic Stress Drive Muscle Growth

Hypertrophy (muscle growth) training is best achieved by manipulating several variables: using a variety of repetition ranges, adequate volume, and harnessing key mechanisms—metabolic stress, mechanical tension, and a degree of muscular damage. The best hypertrophy workouts challenge the muscle (often through moderate sets and reps done close to failure), but ...

Effective strength and muscle growth training relies on careful manipulation of exercise selection, technique, intensity, and volume. Andy Galpin offers evidence-based guidance on how to maximize both strength and hypertrophy while minimizing injury risk and overtraining.

Select Exercises That Allow Full Joint Range of Motion

Exercise selection should emphasize moving every joint through its available range of motion to promote both strength and muscle growth. Galpin explains that training each joint—ankle, knee, hip, elbow—through its full range not only reduces injury risk but also enhances adaptation and productivity in training sessions. For beginners, movement quality and body awareness are vital, so it’s better to start with manageable, stable exercises (such as machine-based presses or rows) rather than complex lifts like the snatch, which may compromise technique if attempted too soon.

Exercises Should Include Push and Pull Motions in Horizontal and Vertical Planes

A balanced routine should cover different movement patterns. For the upper body, include both pushing (e.g., bench press for horizontal, overhead press for vertical) and pulling (e.g., bent-over row for horizontal, pull-up for vertical). For the lower body, alternate between hinge (deadlift) and press (squat) actions. A well-rounded session could involve one exercise from each category.

Prioritize Technique Over Load

For both beginners and advanced trainees, proper movement pattern and technique should always precede adding load. Progressive overload is not just about increasing weight; moving from simple to complex exercises, or improving form and control (such as focusing on eccentric control during a pull-up), also constitutes progress. Poor technique for the sake of increased load can lead to injury and less effective training.

Training Intensity Drives Strength Gains

Intensity refers to the weight lifted as a percentage of your one-rep max (1RM). Strength gains require working above certain intensity thresholds.

Loads Above 85% One-rep Max Optimize Strength Development

Galpin explains that true strength training should use loads above 85% of 1RM, typically for sets of five repetitions or fewer. Lifting at these higher intensities recruits both slow- and fast-twitch muscle fibers, which is crucial for long-term strength and maintaining muscle quality as you age. Loads in the 75-85% range may suffice for less-trained individuals, but as training advances, high intensity is key for continual strength improvement.

Rest Periods of 2-4 Minutes Maintain High Intensity

To prevent fatigue from diminishing performance, rest intervals between heavy sets should be between two and four minutes. Longer rest preserves high intensity across sets, maximizing the training stimulus for strength. Supersetting exercises for different muscle groups can be used to keep sessions time-efficient with only minimal impact on strength development for most individuals.

Training Volume Is the Stimulus For Muscle Growth

Volume, defined as sets times repetitions, is the critical driver of muscle hypertrophy. Soreness is a poor proxy for effective training; excessive soreness often ...

Andrew Huberman and Andy Galpin discuss evidence-based breathing techniques and recovery methods to enhance performance and adaptation in resistance training.

Proper Breathing During Lifts Enhances Performance and Safety

Andy Galpin recommends a general breathing strategy for most people during resistance training: maintain a breath hold (brace) during the lowering or eccentric, and typically most dangerous, part of the movement. For example, in the bench press, you brace and lower the bar in control, and as you initiate the concentric (lifting) phase—pushing the weight away—you start to exhale, ideally during the last half of the concentric portion. This helps maintain core stability and safety during challenging lifts.

If performing a single rep, there's no need to overthink breathing; you can safely omit specific breathing patterns. However, for sets of three or more repetitions, a structured breathing strategy is important to avoid unnecessary pauses and maintain rhythm. Some lifters may benefit from exhaling every third breath, then resetting their breathing pattern. Galpin advises that breathing after every single rep is acceptable but may prove inefficient, especially if it extends rest times between repetitions.

Nasal breathing is encouraged wherever possible during training. This method supports better control and efficiency, especially as exertion increases.

Stress Response Recovery and Down-Regulation Is Crucial

After intense physical or volatile activity, implementing down-regulation breathing strategies is critical for recovery. Galpin recommends nasal breathing post-training to help accelerate the recovery process. A simple rule is to structure exhalations to be twice the length of inhalations; for example, inhale for four seconds, then exhale for eight seconds. Box breathing is also effective: equal phases of inhaling, holding, exhaling, and holding, each lasting several seconds, practiced over a five-minute period.

These strategies sig ...