Dr. Andy Galpin: Optimal Protocols to Build Strength & Grow Muscles | Huberman Lab Guest Series

KEYPOINTS

• 01

  Strength training is the main tool against neuromuscular aging

  Galpin calls heavy-overload resistance training the only exercise route that preserves the nerve–muscle–bone chain behind independent movement. After about age 40, people lose roughly 1% of muscle size a year, but 2–4% of strength and about 8–10% of power. Older adults can have 30–40% fewer motor units. Power is what lets you stand up, catch a fall and move confidently.

• 02

  It is never too late to start

  Starting in your 20s is ideal, but Galpin stresses that a 50-year-old who has never lifted is 'not toast' and can reach a very good level quickly. Bone mineral density responds best to axial (vertical) loading. In his lab's program, women in their 20s and 30s with low bone density showed DEXA-measurable gains within eight months, alongside nutrition and hormone work-ups.

• 03

  The '3 to 5' framework covers speed, power and strength

  Train 3–5 days a week, choosing 3–5 compound exercises, doing 3–5 sets of 3–5 reps with 3–5 minutes of rest between sets. Doing one or two reps is fine; going above five is generally not. The range runs from 3×3 of three exercises three days a week up to 5×5 of five exercises five days a week. Progress the load by roughly 3–5% a week, using smaller jumps on lifts where 5 lb is a big change.

• 04

  Power and strength differ mainly in load and intent

  Power work sets use 30–70% of your one-rep max: up to 50–60% on a squat, closer to 30–40% on a bench. Strength work sets use 70% or more. In both cases intent is critical: you don't get faster by moving 'kind of fast'. With maximal intent you can build strength at 50% of max, or with zero load by squeezing hard during a plank.

• 05

  Prilepin's chart caps how much heavy work is productive

  Galpin uses the old weightlifting chart to dose volume by intensity. At 55–65% of max it prescribes 3–6 reps per set and 18–30 total reps, with about 24 as ideal. At 90% and above it is only 1–2 reps per set and about 7 total. Most working sets live in the 70–90% band, and going beyond the totals brings diminishing or negative returns.

• 06

  Hypertrophy is forgiving but needs about 10–20 hard sets per muscle per week

  Count sets where a muscle is a primary or secondary mover, so biceps count on chin-ups but not pull-ups. Exercise choice matters less than covering all muscle groups (rear delts and calves included) with movements you can push near failure safely. Consistency in exercise selection beats constant variation.

• 07

  Rep range barely matters for growth, but proximity to failure does

  Anything from about 4 to 30 or more reps per set can build muscle if sets end close to failure, roughly two reps in reserve. A set of 25 that only 'started to get hard' does not count. Citing a review from Eric Helms's team, Galpin says total failure isn't required. Use it on safer movements (a hack squat rather than a barbell back squat), and very advanced lifters may need it more often.

• 08

  Six to nine reps is a blend, not a dead zone

  Galpin jokes that students assume 1–5 reps builds strength, 8–12 builds size and 6–9 does nothing. In fact the 6–9 range gives a balanced mix of strength and hypertrophy.

• 09

  Cardio interferes with growth mainly through energy and eccentric damage

  The interference effect largely disappears if you eat enough. Choose endurance modes that spare the trained muscles' eccentric loading, such as cycling instead of running for leg growth. Moderate work, like 25 minutes at 70% of max heart rate, is unlikely to hurt. Best is a separate day, then a separate session, then cardio at the end of the lift.

• 10

  Bracing is about intra-abdominal pressure, not holding your breath for oxygen

  Treat the torso as a cylinder, like a sealed can that resists crushing, and push the belly out front, sides and back without lifting the shoulders. The Valsalva maneuver uses air for that brace. Galpin argues you should learn to breathe and brace at the same time, and says hugely overdeveloped spinal erectors can signal poor bracing.