The problem: one word, a hundred versions
Type the word squat into any search bar and you will meet a wall of opinions. Squats are the king of exercises. Squats ruin your knees. Never let your knees pass your toes. Always go below parallel. Only the barbell back squat counts. Use the leg press instead. Most people leave that wall more confused than when they arrived, and many quietly decide the squat is either too dangerous or too technical for them.
The previous article introduced the ten fundamental movement families APEX uses to organise thousands of exercises. This article takes the first of them, the squat, and answers one question: what is the squat pattern, and how do you choose and progress the version that fits you right now?
The simple answer
The squat is a movement pattern, not a single exercise. It means bending the hips, knees and ankles together to lower your body, with the trunk staying fairly upright, and then standing back up. Every time you sit down on a chair and stand up again, you squat.
Because it is a pattern, many exercises can train it: sit-to-stand, assisted squats, bodyweight squats, goblet squats, Smith machine squats, hack squats, the leg press, front squats and back squats. None of them owns the pattern. The right one for you is the one you can control, repeat and progress, and that moves you closer to your goal. Progress means going further down that path in a way that serves your objective, not automatically climbing toward the barbell.
Why the squat matters to almost everyone
The squat is one of the most practical movements a human performs. Getting off the floor, out of a car, off a toilet, picking a child up from a low position, climbing stairs and landing from a jump all borrow from it. Losing the ability to stand up from a chair without using your hands is one of the clearest signs of lost function in later life. Building the pattern early and keeping it is a quiet investment in independence.
For the goals you met in phase 3, the squat pattern also does a lot of work:
- Health: a loaded squat pattern trains the large muscles of the thighs and hips, which are central to everyday function.
- Muscle: squat-pattern exercises are an efficient way to train the quadriceps and glutes with meaningful load.
- Strength: for anyone who wants to get strong, and for powerlifters especially, the squat is a lift to practise specifically.
- Power and athletic performance: jumping and landing are fast expressions of the same hip, knee and ankle bend.
- Fat loss: squat-pattern work is one of the ways resistance training helps protect muscle while eating less.
The pattern matters. The specific exercise depends on you.
What the evidence says
It helps to separate the layers here, as APEX always does.
Research evidence
Biomechanics research shows that squat variations distribute load differently between the hips, knees and spine. How far you travel, how upright your trunk is, where the load sits (in front of you, on your back, on a machine) and your foot position all change which muscles and joints work hardest.
The fear that squats are inherently bad for the knees is not well supported for healthy people. Reviews of knee forces during the squat suggest that, with appropriate technique and a sensible load progression, the squat is a safe and effective exercise for healthy knees, and that the forces involved are generally within what healthy tissue can adapt to.[1] A review of squat depth and joint loading concluded that deep squats performed with correct technique and progressively increased load do not appear to carry a greater risk of injury for healthy knees than partial squats, and that very heavy partial squats may in some ways place greater demand on the spine and knee because more load can be lifted.[2]
The old rule that the knees must never travel past the toes is also weaker than it sounds. Forcing the knees to stay back tends to push the hips further back and the trunk further forward, which shifts stress toward the hips and lower back. Some forward knee travel is a normal part of squatting for most people.
How certain is this? Fairly certain for healthy adults on the general principles. Much of the research is biomechanical (measuring forces and muscle activity) rather than long-term injury studies, so it tells us how load moves through the body more clearly than it predicts what will happen to any one person.
Coaching principle
From that evidence, a practical coaching principle follows: choose the squat depth and variation you can control without pain, build it gradually, and do not chase a textbook position that does not fit your body. People have different thigh lengths, torso lengths, hip sockets and ankle mobility. Two people can both squat well and look quite different doing it.
The safety boundary
If you have knee, hip or back pain, a recent injury, surgery, a diagnosed joint condition or any health condition that affects exercise, a general article cannot tell you what is right for you. Speak with a qualified healthcare professional, such as a doctor or physiotherapist, before squatting under load, and follow their guidance on what to do and what to avoid. Pain that is sharp, worsening or lingering is a reason to stop and get checked, not to push through.
The APEX principle: capacity and skill, trained together
APEX separates two things that people often blur: capacity (strength, muscular endurance, work capacity and stability) and skill (coordination, position, control, balance, technique and confidence). A beginner usually lacks some of both. The squat shows clearly why both tracks matter.
- Capacity track: supported tools such as the leg press, hack squat or a box squat let you build leg strength and muscle with low balance and coordination demands. You can push hard safely and see progress quickly.
- Skill track: bodyweight squats to a box, goblet squats and tempo squats teach you to own the free movement: where your weight sits on your feet, how your knees track, how you brace and how deep you can go with control.
Then you integrate them. Stronger legs make the free squat easier to learn; better squat skill lets you use that strength in real life and in harder variations.
One caution from the constitution matters here: a strong leg press does not equal a skilled barbell squat. Strength supports skill, but skill still needs practice. The reverse is also true: you do not need a skilled barbell squat to build strong, muscular legs.
The squat tool menu
Think of squat exercises as tools on a menu, each with its own strengths. A rough guide:
- Sit-to-stand (chair or bench): very low skill demand, very functional. Ideal at the Restoration stage, and a useful test at any stage.
- Assisted squat (holding a rail, band or suspension strap): lets you practise depth and position while your hands take some of the balance demand.
- Box squat (bodyweight or loaded): the box gives you a consistent depth target and confidence. A good skill-learning tool and a legitimate strength tool.
- Bodyweight squat: the pattern with no external load. Great for practice and warm-ups.
- Goblet squat (dumbbell or kettlebell held at the chest): the front load helps many people sit upright and balanced. One of the best learning tools for a free squat with load.
- Leg press and hack squat: high stability, high loadability, low balance demand. Excellent for building muscle and strength at any level, not just for beginners.
- Smith machine squat: a fixed bar path. Adds load with less balance demand; useful for some goals and some bodies.
- Front squat: barbell held at the front of the shoulders. Demands an upright trunk, good mobility and upper back strength.
- Back squat: barbell on the upper back. Highly loadable and specific for powerlifting and many strength goals, with the highest technical and coordination demand of the group.
Notice what this list is not. It is not a ladder you must climb from the top to the bottom. A machine is not beginner equipment, and a barbell is not the graduation certificate. An advanced bodybuilder may keep the hack squat and leg press as main lifts for years. A powerlifter needs the back squat because the sport tests it. A person training for health may never need a barbell at all.
What good enough looks like
APEX does not chase perfect movement. It looks for a squat that is:
- Controlled: you lower at a steady pace and do not collapse at the bottom.
- Repeatable: rep five looks like rep one.
- Effective: the legs, not just momentum, are doing the work.
- Tolerable: it does not cause pain during or after.
- Appropriate for you and your goal.
Some practical markers most people can check: the whole foot stays in contact with the floor, the knees travel roughly in line with the toes rather than caving sharply inward, the trunk stays braced rather than folding over, and you reach a depth you can return from with the same control. Your feet may be a little wider or narrower and your toes a little turned out; choose what lets you move comfortably. Depth is personal. Squat as deep as you can while keeping control and comfort, and let that depth grow over time if your goal benefits from it.
What people commonly get wrong
- Treating one exercise as the pattern. Believing that you are not really squatting unless there is a barbell on your back.
- Fear without evidence. Avoiding squatting altogether because of knee myths, then losing the very capacity that protects everyday function.
- Loading before control. Adding weight to a squat you cannot yet perform consistently with your bodyweight.
- Perfect-technique paralysis. Never adding load because the squat does not look like a video of someone with different proportions.
- Calendar progression. Moving to a harder variation because a month passed, not because you earned it.
- Ego depth or ego load. Cutting depth to lift more, or forcing depth your body cannot yet control.
- Ignoring pain. Pushing through sharp or worsening pain instead of stopping and seeking professional advice.
The squat across the APEX stages
- Restoration: sit-to-stand from a chair, assisted squats, gradually lowering the seat height. The goal is safe, confident function and building tolerance. Where rehabilitation is needed, a healthcare professional leads.
- Foundation: box squats and goblet squats for skill, a supported tool such as the leg press for capacity, and simple progression of reps then load.
- Transformation: squat-pattern exercises become key contributors to muscle and fat-loss programs, with structured volume and load progression on whichever tools fit.
- Development: more demanding free squats if they serve the goal, heavier loading, and more deliberate technique work.
- Performance: specificity rules. A powerlifter practises the competition squat; a physique athlete chooses the variations that grow the target muscles best; a jumping athlete links squat strength to power.
- Mastery: sustaining strong, capable legs while managing joints, recovery and life, often rotating between variations that the body tolerates well.
What not to copy
You will see elite lifters squatting enormous loads deep below parallel with highly specific technique, special shoes, belts and years of practice behind them. Their squat is a product of their goal, their body and a long history of gradual progress. Copy the principle (patient, consistent practice of a pattern that serves the goal), not the load, the depth, the variation or the volume. You do not need their squat. You need the next appropriate version of yours.
Your next best step: the squat self-check
This week, find out where your squat currently stands. It takes ten minutes.
- Sit-to-stand: sit on a standard chair or bench with arms crossed. Stand up and sit back down with control five times. Note whether you needed your hands, how stable you felt and whether anything hurt.
- Box squat: if step 1 felt easy, squat to the same box with arms forward for 8 to 10 reps. Then try a slightly lower box. Note the lowest height you can return from with control and no pain.
- Goblet squat: if step 2 felt easy, hold a light dumbbell or kettlebell at your chest and squat to your controlled depth for 8 reps.
- Write it down: which step you reached, your depth, the load, and any discomfort. This is your squat baseline.
Where you stopped tells you your starting tool. If step 1 was hard, sit-to-stand is your squat for now, and that is real training. If step 2 was your limit, box squats plus a supported tool are your next block. If step 3 was comfortable, you are ready to load a free squat progressively while keeping a supported tool for capacity if your goal benefits from it. If anything caused pain, stop there and speak with a qualified healthcare professional before going further.
Then repeat the same test after four to six weeks of consistent training. Progress is not a new exercise. Progress is the same pattern done with more control, more depth where useful, more reps or more load.
Next in the series
The squat bends the hips, knees and ankles together with a fairly upright trunk. The next article covers the hinge, the movement family that bends mainly at the hips with the trunk leaning forward, the pattern behind deadlifts, hip thrusts and safely picking things up from the floor.
