Barbell squat: technique, variations and common mistakes

The barbell squat is the foundation of lower-body training and one of the few exercises that works almost the entire posterior and anterior muscle chains at once. In Ervin Liebert’s handbook “Athletic Gymnastics”, the basic exercise is number 61, and alongside it several variations are described that let you direct the training load more precisely. In this guide we look at how to do the barbell squat correctly, which variations are worth trying and which mistakes most often ruin technique.

How to do the barbell squat correctly?

Liebert describes the basic exercise (no. 61) like this: the barbell is placed on your upper back, you squat down under control and then stand back up. If you don’t have weightlifting shoes, he recommends placing a block of about 5 cm under your heels — it helps keep your back straight and improves balance. Keep your back straight throughout the movement and avoid leaning your shoulders forward, because it is precisely that forward lean that shifts the load onto the lower back. As you rise, don’t bring your knees together; direct them in the direction of your toes. Across different sets you can vary your foot position — narrower one time, wider another — to train the thigh muscles from a slightly different angle. Liebert consistently stresses full range of motion: the movement should be done through the greatest possible range, but not at the expense of technique. The basics are also covered with humor in Squat, squat, squat, squat, squat.

Which barbell squat variations are worth learning?

Liebert’s book offers several variations that change the character of the training load. The half squat (no. 62) is done over a lower bench that you lightly touch with your glutes — this keeps the tension more on the legs and allows you to use a heavier barbell. The Hackenschmidt squat (no. 63) is performed with the barbell behind you in straight arms, which directs more of the load to the front thigh muscles and reduces the share of the gluteal muscles. The sissy squat, or squat with the hips pushed forward (no. 64), isolates the quadriceps when there is a block under the heels and the hips are pushed as far forward as possible. If you want explosiveness, the jump from a full squat with the barbell on your upper back (no. 67) is a good fit, where Liebert warns against leaning forward and stresses a straight back. Less usual variations are introduced in Jefferson squat and Upper-body squat.

What are the most common mistakes when doing the barbell squat?

The three most common mistakes come straight from Liebert’s warnings. First, rounding the back or leaning the shoulders forward — this shifts the load from the legs to the lower back and raises the risk of injury. Second, bringing the knees together as you rise, which loads the knee joint from an unfavorable angle. Third, partial range of motion, where the squat isn’t deep enough and the muscle doesn’t get the full training load. In addition, beginners often make the mistake of choosing a barbell that is too heavy, which makes their technique fall apart in the very first reps. Remember that the squat and the deadlift are not the same movement — their biomechanics differ, as explained in The deadlift is not a squat. The World Health Organization recommends doing muscle-strengthening training at least two times a week (WHO physical activity recommendations), and the barbell squat is one of the most effective choices for that. If you feel sharp pain in your knee or back, stop the exercise and consult a doctor if needed.

How to fit the barbell squat into your program?

The barbell squat works well as the first exercise of a leg day, because it is the movement that demands the most strength and concentration, and it is best done while you are fresh. For a beginner, 3–4 sets of 6–10 reps two times a week is enough, leaving at least one recovery day between workouts. Always warm up with lighter sets, adding weight gradually until you reach your working weight — this prepares your joints and nervous system for the heavy training load. Following the principle of progressive overload, increase the weight in small steps, and only when all reps come with clean technique. It is worth rotating variations week by week: if one week you do the basic barbell squat with the bar on your upper back, the next you can put the emphasis on the half squat with a heavier weight, or on the sissy squat to isolate the front thigh muscle. This kind of variety keeps the training load well-rounded and reduces the overuse that comes from a one-sided movement. If your goal is muscle mass, keep the repetition range at 6–12, and if your goal is maximum strength, do fewer reps with a heavier barbell, but always in a way that keeps your technique flawless. Also keep an eye on recovery: leg muscles are large and need enough sleep and food after a heavy barbell squat for progress to happen. Remember that quality of technique is always more important than the number of plates loaded on the barbell.

References

• Ervin Liebert. “Athletic Gymnastics”. Online edition, atleetvoimlemine.fitness.ee (exercises no. 61–64 and 67).
• WHO (2020). Physical activity recommendations (muscle-strengthening training at least 2 times a week).
• NSCA (National Strength and Conditioning Association). Squat technique guidelines.