Tricep Extension Machine

Definition

The tricep extension machine is a guided isolation exercise that targets the triceps brachii through elbow extension against machine resistance. The fixed movement path eliminates balance demands, allowing athletes to focus entirely on tricep contraction and fatigue. For HYROX^® athletes, it builds the elbow extension endurance that supports sled push lockout, wall ball throws, and SkiErg pulling.

Technique & Form

1. Sit in the machine and adjust the seat so your elbows align with the machine's pivot point. Grip the handles or pad.
2. Select a moderate weight. Your starting position should have your elbows bent at approximately 90 degrees.
3. Extend your elbows fully by pressing the handles downward or forward (depending on machine design), squeezing the triceps at full extension.
4. Hold the lockout for 1 second.
5. Return to the starting position under control over 2-3 seconds. Do not let the weight stack slam between reps.

Muscles Worked

• Primary: Triceps brachii (all three heads)
• Secondary: Anconeus
• Stabilizers: Anterior deltoids (depending on machine angle), core musculature

Common Mistakes

• Using momentum: Swinging the body to move heavier weight defeats the isolation purpose. Keep your back pressed against the pad and move only at the elbows.
• Partial range of motion: Failing to reach full elbow extension misses the lockout strength benefit. Extend fully and squeeze on every rep.
• Too heavy: The tricep extension machine is an isolation exercise, not a strength competition. Use a weight that allows 12-15 controlled reps.

Benefits

• Isolates the triceps for targeted endurance development
• Guided path is safe and consistent for high-rep training
• Requires minimal technique - useful for fatigued athletes at the end of a session
• Builds the lockout strength used in pressing and pushing movements

HYROX^® Context

Tricep endurance supports several HYROX^® stations. During the Sled Push, locked elbows transfer force efficiently - fatigued triceps lead to energy-wasting elbow bend. The SkiErg pull-down phase demands tricep extension for each stroke across 1,000 m. Wall Balls require repeated overhead pressing. While compound exercises should form the base of your program, the tricep extension machine serves as useful accessory work at 3 sets of 12-15 reps during the strength or build phase.

Variations & Alternatives

• Tricep Pushdown - cable-based tricep isolation with adjustable angle
• Seated Tricep Press - overhead dumbbell extension emphasizing the long head
• Weighted Pull Up - compound upper body exercise for overall pushing and pulling balance

FAQ

Is the tricep extension machine necessary for HYROX^®? Not essential, but useful as accessory work. If your sled push lockout or wall ball overhead press fatigues early, tricep isolation work can address this weakness.

How often should I train triceps for HYROX^®? One to two isolation sessions per week is sufficient. Compound movements (push-ups, overhead press, sled push practice) already train the triceps significantly.

Add tricep work to your HYROX^® accessory program at ROXBASE - the hybrid athlete's training platform.