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

KEYPOINTS

• 01

  Exercise produces about nine distinct adaptations, and fat loss is not one of them

  Galpin lists skill, speed, power, strength, hypertrophy, muscular endurance, anaerobic power (roughly 30 seconds to 2 minutes), VO2 max (about 3 to 12 minutes) and long-duration endurance (30+ minutes without a break). Fat loss is a byproduct rather than a trainable quality. Some of these carry over to each other (power is strength multiplied by speed), while others compete, so pushing one hard can cost you another.

• 02

  Every adaptation depends on progressive overload

  Adaptation is a response to stress, so repeating the same Monday-Wednesday-Saturday routine indefinitely will maintain fitness but won't improve it. Overload can come from more weight, more reps, more frequent sessions, more movement complexity, or a bigger range of motion. Galpin stresses that the core concepts are few and the methods are many.

• 03

  Default to taking every joint through its full range of motion across the training week

  Galpin says the research fairly consistently shows larger ranges of motion improve both strength and hypertrophy, and they also reduce injury. The caveat is that full range is a target, not a licence for bad technique. If reaching depth in a deadlift means rounding your lower back, shorten the range and keep the spine neutral.

• 04

  Strength training means heavy loads, few reps and long rests

  Because of Henneman's size principle, high-threshold fast-twitch fibres only get recruited when the muscle has to produce a lot of force. For moderately trained people, that means roughly 85% or more of your one-rep max (about 75% can work for less-trained lifters), five reps or fewer per set, and 2 to 4 minutes of rest between sets so fatigue doesn't cut into intensity. Keeping fast-twitch fibres matters for aging, because they're the ones lost first.

• 05

  Beginners respond to almost anything

  In Galpin's lab, untrained subjects doing just 30 minutes of cycling gained muscle strength and size. Specificity, meaning that what improves reflects what you demanded, only becomes important once you're past the beginner stage. That's when 'imposing a demand of strength, not repetitions' starts to pay off.

• 06

  Hypertrophy is forgiving on reps but strict on effort

  Anywhere from about 5 to 30 reps per set produces broadly similar muscle growth in the research, with 8 to 30 roughly equally effective. The non-negotiables are taking sets close to muscular failure and recovering enough for protein synthesis to happen. He cites recent meta-analyses suggesting a minimum of about 10 working sets per muscle group per week, and suggests rotating rep ranges simply to keep training interesting.

• 07

  Muscle growth has three likely drivers, and any one can be enough

  The three candidates are mechanical tension (heavy loads), muscle damage and metabolic stress (the burn). Galpin says the mechanisms are still a 'guessing game.' Metabolic stress probably explains why very light blood flow restriction training still builds muscle. More soreness isn't better, and a little is only a rough proxy.

• 08

  Endurance work should start with concentric-dominant exercise

  Running is a series of single-leg eccentric landings, so jumping straight back into 25-minute jogs often leads to sore quads, shin splints and knee or back pain from compensating. Galpin suggests building endurance first with cycling, swimming and similar low-eccentric work, then adding running once the tissue can handle it.

• 09

  Hit maximum heart rate about once a week

  Galpin doesn't count conversational-pace movement as exercise, though it's still essential: walk while you take calls, pace around. He recommends one session a week that reaches near-maximal heart rate, which takes at least about 30 seconds of all-out work (e.g. a bike sprint or 90 seconds of burpees). His reasoning is specificity: stroke volume, cardiac output, endothelial function and mitochondrial adaptations only get pushed if you push them. He calls the 220-minus-age formula a rough guide only; his own max is close to 210.

• 10

  Sodium bicarbonate and beta-alanine buffer the acid that drives fatigue

  Galpin explains that fatigue usually reflects a pH signal long before you run out of fuel or oxygen, because enzymes stop working well outside a narrow pH range. Bicarbonate buffers that acid, and beta-alanine is stored as carnosine, which buffers inside the muscle. He calls both cheap, safe and well studied for repeated high-intensity efforts.