What is Leverage?

What is Leverage?

Leverage is the reason two lifters of equal strength and effort can look completely different doing the same exercise, and why one exercise feels natural for you and awkward for a training partner. Your skeleton is a system of levers: bones are the rigid bars, joints are the pivots, and muscles apply the effort. The lengths of those bars, your femur, tibia, torso, arms, and forearms, together with where your muscles attach, decide the moment arms at every joint and therefore how much torque you must produce to move a load. These proportions are called anthropometry, and they vary a lot between people. Someone with long femurs and a short torso has to lean their torso forward more in a low-bar squat to keep the bar over the midfoot, because a long thigh places the hips far behind the knees. Someone with a long torso and short femurs can stay more upright. Neither is doing it wrong; each is finding the position their levers require. Leverage also explains why certain lifts favour certain builds. Lifters with short arms and a thick chest have a shorter bar path and often bench more relative to their size; lifters with long arms often deadlift well because the bar starts closer to lockout but may find the bench harder. None of this is destiny, and leverage does not decide how hard you can train or how much muscle you can build. What it does decide is what good technique looks like for your body, which lifts will feel comparatively strong, and where in a given lift you are likely to be limited. Working with your leverages, rather than forcing a textbook position that suits a different skeleton, is one of the quiet keys to lifting well and staying healthy.

How it works

Leverage works through moment arms, the perpendicular distances from a joint to the line of force. Every lift is a torque problem: your muscles must produce more torque about each joint than the load demands. Your bone lengths set the moment arms of both the load and the muscles, so they directly change the torque you must overcome. Take the squat, the clearest example. Fry and colleagues measured how hip and knee torques shift with squat mechanics, and the general finding is that where the load sits relative to your joints, which your proportions strongly influence, decides how torque is divided between the hips and knees. A lifter with long femurs has a long lever from the hip, so keeping the bar balanced over the midfoot forces the hips back and the torso forward, loading the hips and lower back heavily. Trying to squat upright like a short-femured lifter would push that person's balance forward onto the toes. So the long-femured lifter often does better with a slightly wider stance, a low-bar position, and an accepted forward lean, or by choosing a high-bar or front squat with heeled shoes to stay more upright. Deadlift leverages work the other way: long arms shorten the effective range and can make conventional pulling strong, while a long torso can make it harder to keep the bar close. Escamilla's squat biomechanics work shows how internal joint loads track with these positional choices and with depth. Leverage is not only about long bones; the exact point where a tendon attaches to bone is a moment arm too. Research on the Achilles tendon found that sprinters tend to have a longer Achilles moment arm than distance runners, which suits explosive force, while a shorter moment arm can favour running economy. The same principle scales up to every joint you train: small differences in where muscles attach and how long your segments are add up to real differences in strength at particular tasks. The practical craft is to identify your leverages, from limb proportions and from which lifts feel strong, and then select variations, stances, grips, and cues that put your joints in efficient positions rather than fighting a template built for a different body.

The formula

Mechanical advantage = effort arm / resistance arm

For any lever, mechanical advantage is the length of the effort arm divided by the length of the resistance arm. In the body the effort arm is a muscle's moment arm and the resistance arm is the load's moment arm. Your bone proportions set both, so they set your leverage.

How to apply it

• Set your stance to your femur length: Long femurs usually squat better with a slightly wider stance and toes turned out, which shortens the effective thigh lever and lets you keep balance without an extreme forward lean. Experiment in a rack with light loads to find your natural width.
• Choose the bar position that fits you: Long-femured lifters often prefer low-bar squats and accept a forward lean, or use high-bar and front squats with a heel raise to stay upright. Short-femured lifters can squat upright comfortably. Pick the one that keeps the bar over your midfoot without strain.
• Pick the deadlift style your levers favour: Longer arms and shorter torsos often suit conventional pulling; longer torsos and hips that sit high may do better sumo, which shortens the range and keeps the bar closer. Try both and let bar speed and comfort, not fashion, decide.
• Adjust grip width for arm length: On the bench press, arm length changes bar path. Longer arms mean a longer path, so a slightly wider grip within safe limits can shorten it, while short-armed lifters may bench comfortably with a moderate grip. Keep the elbows and shoulders happy.
• Use accessories to cover leverage gaps: If your leverages make one part of a lift hard, add targeted accessory work. A long-femured squatter who leans forward can build the lower back and hips that the position taxes, closing the gap the leverage creates.
• Stop copying other lifters' positions: The strongest person in your gym found what works for their skeleton. Copying their exact stance or bar position may fight your leverages. Learn the principles, then find the positions that keep your own joints stacked and the bar balanced.

Worked example

Two lifters, same height and strength, squat the same weight but look different because of their proportions. This shows how leverage drives their technique choices. Both are lifting well; each has simply matched the lift to their levers.

Same load, same effort, two correct techniques. Forcing the long-femured lifter to squat as upright as the other would push their balance forward and add strain. Leverage sets what good form looks like for each body.

Favourable vs unfavourable leverage for a lift

Leverage makes some lifts play to your build and others fight it. Unfavourable leverage is not a reason to avoid a lift, it is a reason to adjust the variation and technique and to train the positions your proportions tax the most.

By goal

• Powerlifters: Audit your leverages and pick the squat, bench, and deadlift variations that suit them, then specialise. A sumo deadlift or low-bar squat that matches your proportions can add real numbers to your total with no extra strength.
• Physique and hypertrophy lifters: Leverage decides where a lift loads a muscle for you. If a movement feels awkward or misses the target, swap to a variation your levers like. You are chasing muscle stimulus, so comfort and full range beat rigid technique templates.
• Beginners and general lifters: Do not force a coach's exact position if it pinches or tips you off balance. Learn the principle of keeping the load over the midfoot, then find the stance, grip, and depth your own proportions allow you to hit safely.

Common misconceptions

• "There is one correct form for everyone." There is not. Good form keeps the load balanced and the joints stacked, but the exact torso angle, stance, and grip that achieve that depend on your limb proportions. A position that is textbook for one skeleton can be wrong for another.
• "Long femurs mean you cannot squat well." They mean you squat with more forward lean or a wider stance, or choose front and heeled high-bar squats. Plenty of strong squatters have long femurs; they simply set up to suit their levers instead of forcing an upright torso.
• "Leverage decides how strong you can get." It decides what technique suits you and which lifts play to your build, not your ceiling. Strength comes from training, muscle, and skill. Leverage shapes the how, not the how much, and it can be worked around with smart variation choices.
• "Bad leverage for a lift means avoid it entirely." Rarely. Unfavourable leverage is a cue to adjust the variation, stance, or grip and to strengthen the positions it taxes, not to drop the lift. Most leverage disadvantages can be managed with technique and targeted accessory work.

Related terms

Leverage FAQ

What does leverage mean in weightlifting?

Leverage is how your individual limb lengths and body proportions affect your strength and technique in a lift. Because bones act as levers, longer or shorter segments change the moment arms at each joint, which changes how a lift should look and where it feels hard for you.

Why do long femurs make squatting harder?

A long femur places your hips far behind your knees, so to keep the bar balanced over your midfoot you must lean the torso forward more. That forward lean loads the hips and lower back heavily, which is why long-femured lifters often look bent over in the squat.

How do I know my leverages?

Look at your proportions, such as femur length relative to torso and arm length relative to height, and notice which lifts and positions feel naturally strong. If a lift feels awkward at a position that suits others, your leverages likely differ and your setup should too.

Does leverage limit how strong I can get?

No. Leverage shapes what technique suits you and which lifts play to your build, but your strength ceiling comes from training, muscle, and skill. Even lifts where your leverage is unfavourable improve a great deal with the right variation and consistent work.

Should I copy a strong lifter's technique?

Only the principles, not the exact positions. A strong lifter found what suits their skeleton. Copy the ideas, keep the load over the midfoot, brace hard, control the bar path, but find the stance, grip, and torso angle that fit your own proportions.

Do long arms help or hurt lifting?

It depends on the lift. Long arms often help the deadlift because the bar starts closer to lockout, but they lengthen the bar path in the bench press and can make it harder. Every proportion is an advantage somewhere and a disadvantage elsewhere.

Can I change my leverages?

You cannot change your bone lengths, but you can change how you use them: stance width, bar position, grip, and which variation you pick all alter the effective moment arms. Smart setup lets you work with the leverages you have rather than against them.

Why is sumo deadlift better for some people?

Sumo widens the stance and lets the torso stay more upright, which shortens the range and keeps the bar closer to the hips. Lifters with proportions that make conventional pulling long or bent over often move more weight and feel safer pulling sumo.

References

1. Fry AC, Smith JC, Schilling BK. Effect of knee position on hip and knee torques during the barbell squat. J Strength Cond Res, 2003. PubMed 14636100
2. Escamilla RF. Knee biomechanics of the dynamic squat exercise. Med Sci Sports Exerc, 2001. PubMed 11194098
3. Sprint runners have longer Achilles tendon moment arm than distance runners. J Biomech, 2025. PubMed 39919622
4. Schwanbeck SR, et al. Effects of training with free weights versus machines on muscle mass, strength, free testosterone, and free cortisol levels. J Strength Cond Res, 2020. PubMed 32358310
5. Escamilla RF, et al. Biomechanics of the knee during closed kinetic chain and open kinetic chain exercises. Med Sci Sports Exerc, 1998. PubMed 9565938