The training secret that helped one of the strongest men who ever lived develop unbelievable levels of power — and how it applies to every trainee seeking new muscle growth
If there is one exercise that has earned its place in every serious discussion about mass building workout routines, it is the squat. Long before fitness influencers filled social media with complicated programmes and exotic exercises, generations of strongmen, bodybuilders, and athletes relied upon the squat as the foundation of their strength and muscular development. Few exercises challenge as much muscle mass simultaneously — a hard set taxes the thighs, hips, glutes, lower back, core, and cardiovascular system all at once.
Yet hidden within the history of this legendary exercise lies a training insight that many modern lifters have forgotten. A technique that helped one of the strongest men who ever lived develop extraordinary levels of power — and that may help any trainee break through plateaus and stimulate new muscle growth. The man was Paul Anderson. And the exercise was the quarter squat.
Paul Anderson remains one of the most remarkable strength athletes in history. Before the era of advanced sports science, specialised equipment, and modern supplementation, Anderson built a level of strength that still commands respect today. Among his many astonishing feats was a squat of approximately 1,800 pounds — achieved through his deliberate use of partial range training.
Strength built through brutally practical training in an era before modern equipment — and largely through the intelligent use of partial range work.
Equivalent to four adult mountain gorillas. The load Anderson worked up to through progressive partial range training.
Most trainees can handle 50% or more of their full squat weight in the partial range — advanced lifters sometimes close to double.
After weeks of partial training, Anderson's description of returning to full squats — the most famous observation in the quarter squat tradition.
To appreciate what 1,800 pounds means, imagine loading four adult mountain gorillas onto a barbell and attempting to stand up with them resting across your shoulders. Anderson was not performing full deep squats with that load — he used partial range movements to expose his body to weights that would otherwise be impossible to support. This approach became a cornerstone of his training philosophy and helped develop the extraordinary strength for which he became famous.
Progressive overload applied intelligently — the same principle Anderson used with partial squats — is the central loading mechanism of the Minimum Effective Strength System. Find the movement that challenges the body productively. Add load systematically. Recover completely.
Most trainees assume that a full squat automatically allows them to use maximum strength. In reality the opposite is often true. Every exercise contains stronger and weaker ranges of motion. During a deep squat, the bottom position is the weakest portion of the lift. The muscles operate at a mechanical disadvantage, leverage is reduced, and force production is limited. Because of this limitation, the weight selected must be one that can be controlled through the weakest part of the movement.
This means the strongest portion of the squat — the top range where leverage is most favourable — never receives the level of resistance it could potentially tolerate. Much of the muscular system is capable of handling significantly heavier loads than the barbell provides at any given training session. This is precisely what Anderson recognised. By training the top portion of the movement separately, he exposed his muscles, tendons, ligaments, and nervous system to dramatically heavier weights — creating adaptations that elevated his overall strength to legendary levels.
Heavy partials are not a shortcut. They are a targeted tool for developing the specific adaptations that full-range training alone cannot produce.
Heavy loads teach the nervous system to coordinate maximal muscle fibre recruitment — an adaptation that transfers directly to full-range performance.
Tendons and ligaments adapt to heavy loading over time — and partial range work allows those structures to be progressively overloaded without the joint stress of deep positions under maximum load.
Handling weights significantly heavier than normal full squat loads recalibrates the trainee's perception of what is manageable — Anderson's "feather" effect in action.
The strongest muscle positions receive the heaviest loading they can tolerate — a unique stimulus that full-range training at submaximal loads cannot replicate.
One of Anderson's most famous observations concerned what happened when he returned to full squats after a period of partial training. After several weeks of quarter squat work, he described returning to conventional full squats and finding them astonishingly easy by comparison. His words became part of strength training folklore.
"When I did them for a few weeks without doing full squats, I wanted to see what full squats would be like, so I started doing the full squats again — they felt like a feather."
Paul Anderson — attributed in strength training literatureThe principle behind this experience is straightforward. When the body becomes accustomed to supporting enormous loads, lighter weights no longer appear quite so intimidating. Confidence improves. Neural efficiency improves. The lifter approaches the movement with a fundamentally different mindset about what is possible. This does not mean quarter squats should completely replace full squats. They should complement them — used intelligently to strengthen the portions of the lift that full-range training leaves underdeveloped.
One of the most interesting applications of quarter squat training involves mature trainees. As we age, recovery becomes increasingly important. Joint health, connective tissue integrity, and overall training stress require careful management. Quarter squats can play a useful role here — because the movement occurs in a stronger range of motion, some trainees find they can continue exposing their muscles to heavy resistance without subjecting hips, knees, and lower back to the demands of repeated maximal deep squatting.
A strategic complement to full-range training rather than a replacement for it.
The real lesson from Paul Anderson's training is not that quarter squats are magical, or that every trainee should immediately load enormous amounts of weight onto a barbell. The real lesson is more fundamental. Muscles grow when they are challenged. Strength increases when the body is exposed to progressively greater demands. Successful mass building workout routines find intelligent ways to increase those demands over time. Partial range exercises represent one method of accomplishing this goal — by providing a unique form of overload that complements traditional exercises. Progress rarely comes from doing more exercises. It comes from finding smarter ways to make existing exercises more productive. For the full progressive overload framework, see the high intensity training page.
You probably won't find yourself squatting four gorillas any time soon. But you may discover that training in your strongest range unlocks new levels of muscle growth and strength that have been waiting beneath the surface — exactly the kind of intelligent progressive overload the Minimum Effective Strength System is designed to apply.