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  3. Exercises
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  5. Shoulders
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  7. Boxing Duck And Uppercut

Exercise guide

Boxing Duck And Uppercut

  • Intermediate
  • Compound
  • Rep-based
  • Shoulders
  • Upper arms
  • Waist

This compound movement combines a defensive squat with a powerful rotational strike, building lower body explosiveness and core stability. It targets the glutes and quads during the duck, while the obliques and deltoids drive the punching phase.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Boxing Duck And Uppercut demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Biceps
  • Calves
  • Deltoids
  • Glutes
  • Quadriceps

Secondary

  • Forearms
  • Grip muscles
  • Serratus anterior
  • Trapezius

Equipment

  • Body weight

Setup

  1. Stand in a boxing stance with feet shoulder-width apart, lead foot forward, and knees slightly bent.
  2. Bring your hands up to a guard position near your chin with elbows tucked into your ribs.
  3. Distribute your weight on the balls of your feet to maintain agility and balance.

How to do it

  1. Perform a 'duck' by bending your knees and hips in a U-shaped motion, shifting weight from the lead leg to the rear leg.
  2. As you rise from the squat, pivot on the ball of your rear foot and rotate your hips and torso toward the front.
  3. Drive your fist upward in a tight arc with the elbow bent at 90 degrees, exhaling sharply on the strike.
  4. Inhale as you return to the starting guard position and reset for the next repetition.

Form checklist

  • Keep your core engaged and chest up; avoid rounding your lower back during the duck.
  • Power the uppercut through hip rotation and leg drive rather than just arm strength.
  • Maintain a high guard with your non-punching hand to protect your face.
  • Ensure your knee and toe point in the same direction during the pivot to protect the joint.

Pro tips

  • Focus on the 'snap' at the peak of the punch by briefly tensing your bicep and shoulder for maximum muscle recruitment.
  • Visualize moving your head under an opponent's hook to ensure a deep, functional squat that fully engages the glutes.

Make it harder

  • Hold light dumbbells (1-3 lbs) to add resistance to the punch and increase shoulder endurance.
  • Increase the speed of the transition from the duck to the punch to develop greater explosive power.

Frequently asked

What muscles does the boxing duck and uppercut work?
The boxing duck and uppercut primarily targets the biceps, calves, deltoids, glutes, and quadriceps, and also works the forearms, grip muscles, serratus anterior, and trapezius as secondary muscles.
What equipment do you need for the boxing duck and uppercut?
The boxing duck and uppercut requires no equipment — just your body weight.
Is the boxing duck and uppercut good for beginners?
The boxing duck and uppercut is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.

Related exercises

  • Kettlebell One Arm CleanIntermediate · biceps, calves, deltoids, glutes, hamstrings, quadriceps, and triceps
  • Barbell Power JerkAdvanced · adductors, calves, deltoids, glutes, hamstrings, and quadriceps
  • Baseball HitAdvanced · biceps, deltoids, glutes, hamstrings, lats, obliques, pectorals, quadriceps, and triceps
  • Duck Side PunchBeginner · calves, deltoids, glutes, and quadriceps

Train it with Crucible Fit.

Every movement in this library is in the app with video and instructions, ready for your own sessions on the days between Crucibles. Your first Crucible is on us.

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