The single arm tricep pushdown works all three heads of the triceps brachii — the lateral head (primary emphasis), medial head, and long head. Secondary muscles include forearm flexors (grip) and core (anti-rotation stabilization).
Muscles Worked in Detail
The triceps brachii is the sole prime mover. The lateral head is most active in the arms-at-sides position with a neutral or overhand grip. The medial head contributes throughout and is especially active at full lockout. The long head provides moderate assistance.
The anconeus assists with extension. Forearm flexors stabilize grip. When standing, the core engages to resist rotational pull — this anti-rotation demand is unique to the single-arm variation.
Proper Form
Stand facing a cable machine with a single handle on a high pulley. Grip with one hand, elbow pinned to your side at 90 degrees. Feet shoulder-width with a slight stagger. Extend the elbow fully, squeeze at the bottom for one count. Return under control — 2 to 3 seconds up. Only the elbow moves.
Programming: 3 sets of 12 to 15 reps per arm. Alternate arms with minimal rest, then 60 seconds before the next set.
Advantages Over Two-Arm Pushdowns
Corrects left-right imbalances. Unrestricted cable path allows a more natural elbow path and slightly larger ROM. Anti-rotation core demand adds functional stability. Excellent for bodybuilding, rehab from strains, and athletes needing balanced arm strength.
Single Cable Handle
D-handle for unilateral pushdowns.
Why we suggest it: Natural elbow path for single-arm work.
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Common Mistakes
Letting the elbow drift forward. Using momentum from the torso. Cutting ROM short at the bottom. Going too heavy — if your body rotates, reduce weight. These reduce activation and increase elbow stress.
For variety, try with a rope attachment — allows a pronation twist at bottom for increased lateral head contraction. See our complete pushdown guide. Include alongside overhead extensions and compound pressing for complete tricep training.
