KB Thruster

ExtrasKB

A front squat immediately followed by an overhead press in one continuous motion, using the squat's upward momentum to help drive the press. One of the highest-output combination movements in kettlebell/dumbbell conditioning.

Demo: KB conditioning demo

Sets

4

Reps

10-15

Rest

1:15

Contraindications

Avoid with knee pain limiting squat depth, or shoulder impingement affecting the overhead lockout. High metabolic cost — pace appropriately for the prescribed rep range.

Setup

Hold one or two kettlebells at the shoulders/rack position, feet shoulder-width.

Execution

  1. 1Squat to at least parallel depth, keeping the bells racked at the shoulders
  2. 2Drive up out of the squat explosively
  3. 3Use the upward momentum to help press the bells overhead to full lockout
  4. 4Lower the bells back to the rack under control
  5. 5Descend immediately into the next squat — keep the tempo fluid

Key cues

  • Full squat depth every rep
  • Use the squat's momentum to assist the press
  • Lock out overhead fully, hips under the bells
  • Keep a fluid squat-to-press rhythm, don't pause excessively

Common faults

  • Shallow squat depth reducing the movement's power transfer
  • Pressing with the arms alone, missing the leg-drive assist
  • Leaning back excessively on the press portion
  • Losing rack position stability as fatigue accumulates

Tweaks

  • Use double kettlebells for a heavier stimulus or a single bell for higher-rep conditioning
  • Combine with wall balls in an alternating conditioning circuit
  • Perform for max reps in a time window as a benchmark test

Regressions

Wall Ball (BW Squat + Throw)

Muscles

Primary: Quadriceps, Glutes, Shoulders

Secondary: Triceps, Core, Calves

Notes

Primary energy system: lactic (glycolytic). Often cited as one of the single most metabolically taxing barbell/kettlebell movements per rep due to combining the two largest muscle-mass patterns (squat and press) into one fluid motion.

Sources

Attribution: CrossFit Journal