| Knees cave excessively | Stance may be too wide for hip anatomy, weak abductors, or poor motor pattern | Narrow stance slightly; add cue to push knees out; use a light band around knees for feedback | Hip thrusts with abduction band, abductor work, progressive practice |
| Butt wink (true lumbar flexion) | Could be control issue or anatomy-limited end ROM | Confirm if true rounding vs just moving from hyperextension to neutral; reduce ROM to controllable depth; improve bracing | Progression: goblet -> front -> high bar; pin squat progressive ROM; pre-set planks/side planks |
| Forward collapse / good morning squat | Often quad under-contribution; hip/back taking over | Out of hole cue “traps back + hips under”; keep knees from shooting back immediately | Front squats, leg press/hack squat, split squats/lunges/step-ups |
| Can’t hit depth without losing position | Usually setup mismatch, mobility misunderstanding, or control under load | Adjust stance/toe angle based on knee tracking; test unloaded vs loaded control; use heel-elevated shoes if true ankle limitation | Targeted mobility only if truly limited; strengthen quads/calves as needed |
| Losing balance forward | Mid-foot pressure lost, torso caves, toes/stance mismatch | Re-establish tripod foot; cue traps back; keep bar over system COM and center pressure mid-foot | Solid-sole shoes, practice consistent walkout + bracing routine |