Dumbbell Kickback

Definition

The dumbbell kickback is an isolation exercise targeting the triceps brachii. The athlete hinges forward, pins the upper arm parallel to the torso, and extends the forearm backward until the arm is fully straight. It isolates the triceps through the full extension range of motion, building the lockout strength that supports pushing movements in HYROX^®.

Technique & Form

1. Starting position - Hinge forward at the hips to about 45 degrees. Hold a dumbbell in the working hand. Pin the upper arm against the side of the torso, parallel to the floor. Elbow bent at 90 degrees.
2. Extension phase - Extend the forearm backward until the arm is completely straight. Squeeze the triceps at full extension.
3. Lowering phase - Return to 90-degree bend under control. Keep the upper arm stationary throughout.
4. Breathing - Exhale during extension; inhale during the return.
5. Tempo - 1 second up, 1-second hold, 2 seconds down.

Muscles Worked

• Primary movers: Triceps brachii (especially the long head)
• Stabilizers: Posterior deltoid, core, erector spinae

Common Mistakes

• Swinging the upper arm - Moving the elbow reduces tricep isolation. Fix: brace the upper arm firmly against the torso.
• Using too much weight - Compromises range of motion. Fix: use a weight that allows full extension with a squeeze.

Benefits

• Isolates the triceps through their full range of motion.
• Builds the elbow extension strength needed for sled pushes and bench press lockout.
• Requires minimal equipment - a single dumbbell and a hinge position.

HYROX^® Context

The kickback builds tricep endurance that supports sustained sled pushing and overhead pressing during wall balls. While not a primary exercise, it is a useful accessory for athletes whose triceps fatigue early during pressing stations. Program 2-3 sets of 12-15 reps per arm at the end of push-day sessions, pairing with dumbbell tricep extensions for complete tricep development.

Variations & Alternatives

• Dumbbell Tricep Extension - Overhead extension for greater stretch on the long head.
• Dumbbell Skullcrusher - Lying tricep extension for heavier loading.
• Dumbbell Bench Press - Compound press that trains the triceps under heavier loads.

FAQ

Are kickbacks effective for building tricep strength? For isolation and endurance, yes. For maximal strength, compound movements like the bench press and overhead press are more effective. Kickbacks are best used as a finishing exercise.

How heavy should I go? Light - 4-10 kg. Full extension and a peak contraction matter more than weight. If you cannot fully straighten the arm, reduce the load.

Track your tricep accessories and pushing strength with ROXBASE.