The Rucking Protocol
Load your hips, chase the hills, and get strength and endurance in one session.
- Difficulty
- Easy
- Time to result
- ~weeks to results
- Steps
- 5
- Confidence
- 88%
Rucking is walking with a heavily weighted backpack, and Attia treats it as a two-for-one. Uphill supplies the cardiovascular load — he deliberately pushes hard on climbs. Downhill supplies what he calls the huge eccentric gear: decelerating a loaded body down a steep grade, without the joint pounding you would need running to produce the same effect. His own protocol is 55 to 60 pounds for about an hour on hilly terrain, deliberately seeking the steepest descents. Loading matters as much as weight: he wants roughly 80 percent of the load on his hips and virtually none on his shoulders, and skips the chest strap so he can breathe fully. Starting weight is a sixth to a quarter of body weight, and Attia cites Michael Easter that even the military now sees little reason to exceed a third.
Origin
Extracted from The Tim Ferriss Show
Core principles
- 01Rucking combines a strength stimulus and an endurance stimulus in one session.
- 02Downhill under load is a large eccentric stimulus without the joint impact of running.
- 03Weight belongs on the hips, not the shoulders.
- 04Start lighter than you think; the walk back for an abandoned pack is longer.
- 05Incline is a better dial than added weight past a point.
How to run it
- 1
Pick a starting weight
Attia recommends beginning at a sixth to a quarter of body weight. He notes that if you overload, you will end up dropping the pack somewhere.
Watch out Ferriss once loaded a 100-pound vest at 180 pounds body weight and had to abandon it on the sidewalk a mile from home.
- 2
Set the working range
A sixth to a third of body weight is the sweet spot. Attia works at 55 to 60 pounds; Ferriss settled around 45 at about 175 pounds body weight.
Pro tip Past a point, add incline rather than weight.
- 3
Fit the pack to the hips
Use a pack with a waist belt and drive roughly 80 percent of the load onto the hips, keeping the shoulders light. Attia leaves the chest strap unclipped to breathe fully.
Pro tip Ferriss found packs without a waist strap caused back pain with enough weight or duration.
- 4
Push the climbs
Go hard uphill. This is where the cardiovascular stimulus comes from, and it is why Attia values living somewhere hilly.
- 5
Hunt the steepest descents
Attia deliberately finds the steepest hills to come down, because descending under load forces hard deceleration and is the eccentric payload of the session.
Pro tip This is the part running would otherwise supply, minus the impact on the knees.
In the wild
Ferriss was a cross-country runner until about fifteen, then developed knee problems through wrestling and other impact sports and stopped running entirely. He missed the sensation of a good workout while moving over ground. Rucking and ski skinning restored it, and he reports his body, including his low back, feels markedly better when he is doing them. He built up rucking specifically in preparation for Alpine hunts and found the benefits translated in unexpected ways, similar to what he had seen with kettlebell swings.
→ Aerobic and loaded work restored without the joint impact that had ended his running.
Common mistakes
Starting far too heavy
Ferriss's 100-pound vest attempt ended a mile from his house with the vest left on the sidewalk. Load tolerance for walking is not the same as strength in the gym.
Carrying the weight on the shoulders
A pack without a waist belt puts the load high and causes back pain over distance. The hips should take most of it.
Walking flat ground and adding weight instead
Flat rucking skips the descent, which is where the eccentric stimulus lives. Incline is the better dial.
Is it for you?
Best for
People who dislike running or have knee issues but want loaded eccentric work and aerobic volume together.
Not ideal for
Anyone with an acute back or hip injury, or people who need highly specific interval work rather than mixed-modality volume.
From the transcript
“I use 55 to 60 pounds and I'll typically do an hour Ruck and because of where I live it's really hilly so I really…”
“I recommend people start with a sixth to a quarter of their body weight”
From the episode
#661: Dr. Peter Attia — The Science and Art of Longevity, Optimizing Protein, Alcohol Rules, Lessons from Glucose Monitoring with CGMs, Boosting Your VO2 Max, Preventing Alzheimer's Disease, Early Cancer Detection, How to Use DEXA Scans, Nature’s Longevity Drug, and More