Olympic Lifting, Kettlebells & Bands — all lessons

Recognising squat and deadlift errors

Spotting and correcting common back squat and deadlift faults — depth, knee valgus, heel lift, lumbar rounding, bar path — and when a “fault” is just individual variation.

Intermediate Evidence: Strong evidence 3 min read Reviewed 2026-10-31 Status: draft

Learning objectives

  • Identify common squat and deadlift faults
  • Distinguish faults from normal individual variation
  • Apply cues, regressions and mobility solutions
  • Use video for technique review

Before this lesson

Why this matters

Squats and deadlifts underpin every weightlifting movement. Faults here carry into the clean and snatch.

Squat faults [myer2014]

FaultPossible causesFixes
Knee valgusHip control, fatigue, loadCue “knees track over toes”, lighter load, banded squats
Heel liftAnkle mobility, weight shiftHeel elevation, goblet squat, ankle mobility
Excessive leanAnthropometry, weak quads/upper backFront squat, tempo squats
Lumbar flexion at depthHip structure, controlDepth to control, box squats

Knee forces and mechanics change with depth and technique [escamilla2001] [schoenfeld2010].

Deadlift faults

FaultFix
Bar drifts forwardStart over mid-foot, “push the floor away”, lats tight
Hips shoot upLeg-drive cue, lighter load, pause at knee
Rounded back under loadReduce load, block pulls, trap bar

The trap-bar deadlift shifts load toward the knees and keeps the torso more upright [swinton2011].

Variation vs fault

Not every difference is a fault. Judge by bar path, control and consistency under load.

Common mistakes and misconceptions

Case study

A rugby player’s heels lift and knees cave at depth. Squatting with a small heel lift and a goblet-squat warm-up, plus lighter loads, fixes both within four weeks.

Further learning: video lessons

Video links are only marked “verified” after a human has watched them. Unverified entries open a YouTube search for that channel and topic rather than a guessed link.

Knowledge check

Knowledge check · 0/5

1. Knee valgus means the knees…

Answer B. Inward collapse.

2. Heel lift in the squat often relates to…

Answer B. Ankle mobility/weight shift.

3. In the deadlift, the bar should travel…

Answer B. Efficient bar path.

4. A lifter with long femurs will usually show…

Answer B. Anthropometry.

5. A first response to technique breakdown under load is…

Answer B. Load management.

Short-answer & application questions

  1. Film a squat and identify two faults.
  2. Write cues for knee valgus and heel lift.
  3. Compare conventional and trap-bar deadlift mechanics.

Key takeaways

  • The squat and pull are the foundations of weightlifting.
  • Common faults: excessive forward lean, knee valgus, heel lift, lumbar rounding, bar drifting away from mid-foot.
  • Individual anatomy (femur length, hip structure) changes what “good” looks like.
  • Fix with cueing, load reduction, positional regressions and targeted mobility.

Connected topics

References

  1. Schoenfeld BJ (2010). Squatting kinematics and kinetics and their application to exercise performance. Journal of Strength and Conditioning Research, 24(12):3497–3506. Narrative review check pending
  2. Escamilla RF (2001). Knee biomechanics of the dynamic squat exercise. Medicine & Science in Sports & Exercise, 33(1):127–141. Narrative review check pending
  3. Myer GD, Kushner AM, Brent JL, et al. (2014). The back squat: a proposed assessment of functional deficits and technical factors that limit performance. Strength and Conditioning Journal, 36(6):4–27. Narrative review check pending
  4. Swinton PA, Stewart A, Agouris I, Keogh JW, Lloyd R (2011). A biomechanical analysis of straight and hexagonal barbell deadlifts using submaximal loads. Journal of Strength and Conditioning Research, 25(7):2000–2009. RCT check pending

Educational content only — not medical advice. Consult a qualified clinician for diagnosis or treatment.