Back Squat Coaching for a Mixed-Mobility Group
You are coaching 12 high school athletes in their first back-squat session. One athlete's heels lift and knees collapse inward during a bodyweight squat; another has a healed wrist fracture and cannot get into a comfortable back-rack position; a third can squat well but has never trained with a barbell. The head coach wants all athletes to perform 5x5 at 85% of a 1RM that was estimated from a recent 3RM test. The group has 45 minutes, two racks, and no assistant. The athletes have varying heights and limb lengths. The coach says technique can be fixed "once the weight gets heavy."
1. What screening and technique assessment would you perform before loading, and what faults would you prioritize?
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Screen with bodyweight and a dowel before any barbell load: overhead squat, narrow- and normal-stance squat, and a single-leg sit-to-stand. Watch foot position, heel contact, knee tracking, trunk position, and depth control. For the athlete with heel rise and knee valgus, prioritize heel contact and knee tracking: use a small wedge or plate under the heels only as a temporary teaching aid, cue "spread the floor" and "knees over the middle toes," and reduce depth to the point where control is maintained. Check ankle dorsiflexion and hip control; if the fault persists, use a goblet squat or box squat. For the wrist-fracture athlete, test a strap-assisted back rack, a safety-bar squat, or a front-rack variation with straps; do not force a painful rack position. For the novice, teach the hip hinge and brace with a dowel and empty bar. The coach's idea that heavy weight fixes technique is backwards: load amplifies the fault and raises injury risk.
2. How would you modify the coach's 5x5 at 85% prescription for this group, and what load, sets, and repetitions would you use?
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Do not use 85% of an estimated 1RM for all 12 athletes in their first barbell session. An estimate from a 3RM is not a true 1RM, and the athletes have not demonstrated consistent technique under load. Use a ramp-up with technique gates: empty bar for 2x8, then add load only if the athlete maintains heel contact, knee tracking, and trunk control for all repetitions. For most, prescribe 3-4 sets of 5-6 at RPE 6-7, which is well below 85%. Use a box squat or goblet squat for the athlete with heel rise and valgus until control improves. Use a safety-bar squat or strap-assisted back squat for the wrist-fracture athlete. The novice can use the empty bar or a lightly loaded trap bar. With two racks and no assistant, run two groups: one on racks with spotters, one on goblet/box variations. This preserves quality and supervision. The coach can still get volume, but not at a intensity the group has not earned.
3. What cues and progressions would you use for the athlete with heel rise and knee valgus, and when would you allow a return to the coach's 5x5 plan?
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Start with ankle mobility drills and a temporary heel wedge, then cue "big toe, little toe, heel" for tripod contact and "push the knees out over the middle toes." Use a box squat to set depth and a band around the knees for tactile feedback. Pair with single-leg sit-to-stands and lateral band walks to build hip control. Progress from bodyweight to goblet squat to box squat with load, then to a free back squat only when the athlete keeps heel contact and knee tracking for all reps at RPE 7. Allow the coach's 5x5 at 85% only after the athlete has a valid 1RM or reliable 3RM, consistent technique under moderate load, and adequate supervision. Even then, 85% for 5x5 is a high-volume strength stimulus; use it for athletes with training history, not for the whole group. Re-screen at the next session and document the progression criteria so the coach can see why the timeline is individualized.