The triceps make up two-thirds of the upper arm. The biceps get most of the attention. That mismatch is the single most common reason lifters spend years curling and never develop noticeable arm size. Real arm size comes from heavy, balanced training of both heads, with the triceps prioritised because they are the bigger muscle. The exercises that build arms are not exotic. The discipline to actually train them hard, twice a week, for months, is.
Tricep Builders
1. Close-Grip Bench Press
The heaviest possible tricep loading. The close-grip bench is essentially a normal bench press with hands shoulder-width apart, which shifts emphasis from the chest to the triceps. It loads the long head of the tricep under maximal weight, which builds the kind of tricep mass that makes arms look thick from any angle.
How to do it: Same setup as standard bench press but hands at shoulder-width. Lower the bar to the lower chest, keeping elbows tucked tight against the body. Press up. The reduced grip width forces the triceps to do more of the work.
Programme as: 3 to 4 sets of 5 to 8 reps. The strength anchor for tricep development.
2. Dip
Bodyweight tricep loading at full range. The dip in a vertical torso position emphasises the triceps; lean forward 15 degrees and it shifts towards chest. For tricep development, run them upright.
Programme as: 3 to 4 sets of 8 to 15 reps. Add weight via a dip belt once you can do 10 strict reps.
3. Skull Crusher (Lying Tricep Extension)
Long-head tricep isolation. The skull crusher loads the tricep through the shoulder-extended position, which targets the long head specifically. It is also the lift most likely to bite the elbow joint if executed sloppily, so form matters.
How to do it: Lie on a flat bench with an EZ-curl bar. Press the bar overhead, then lower it by bending only at the elbows, until the bar is just above the forehead. Reverse to extension. Keep elbows pointing up the entire rep, do not let them flare.
Programme as: 3 sets of 8 to 12 reps.
4. Overhead Tricep Extension
The other long-head specialist. Performed standing or seated with a single dumbbell or cable, the overhead tricep extension stretches the long head fully at the bottom, which produces strong growth stimulus.
How to do it: Hold a dumbbell or cable rope overhead with both hands. Lower behind the head by bending elbows. Reverse to full extension. Keep elbows close to the head, not flaring.
Programme as: 3 sets of 10 to 15 reps.
5. Tricep Pushdown
The most popular tricep exercise in commercial gyms. Constant cable tension, easy to load, and a high-volume staple. Use a rope attachment for the most range, a straight bar for the heaviest possible load.
Programme as: 3 sets of 10 to 15 reps. Often a finisher after compound work.
Bicep Builders
6. Barbell Curl
The classic bicep mass-builder. The barbell curl loads both bicep heads under heavy weight in a stable bilateral position, which is what makes it the bicep's equivalent of the bench press: the strength anchor for the muscle.
How to do it: Stand with a barbell, hands shoulder-width or slightly wider, palms forward. Curl by flexing the elbows, keeping the upper arms stationary. Lower under control. Resist the temptation to swing the bar with body english.
Programme as: 3 to 4 sets of 6 to 10 reps.
7. Hammer Curl
Trains the brachialis (a muscle under the biceps) and the brachioradialis (forearm), both of which contribute to upper-arm thickness. Performed with dumbbells in a neutral grip (palms facing each other).
Programme as: 3 sets of 10 to 12 reps.
8. Incline Dumbbell Curl
Stretches the long head of the bicep at the bottom, which is the position the standing curl undertrains. Performed seated on an incline bench (45 to 60 degrees), with arms hanging straight down. Curl up, focusing on the stretch at the bottom.
Programme as: 3 sets of 8 to 12 reps.
9. Cable Curl
Constant tension throughout the range, which dumbbell and barbell curls lose at the top. A cable curl with a straight or EZ bar attachment, or with a single rope, makes a clean finisher for arm sessions.
Programme as: 3 sets of 12 to 15 reps as a high-volume finisher.
How to Build an Arm Day
On a body-part split:
- Close-Grip Bench Press, 4 sets of 5 to 8 reps. Tricep strength anchor.
- Barbell Curl, 4 sets of 6 to 10 reps. Bicep strength anchor.
- Skull Crusher, 3 sets of 8 to 12 reps. Tricep long head.
- Hammer Curl, 3 sets of 10 to 12 reps. Brachialis and forearm.
- Tricep Pushdown, 3 sets of 10 to 15 reps. Tricep finisher.
- Cable Curl, 3 sets of 12 to 15 reps. Bicep finisher.
On Push and Pull split, integrate arm work into each session:
- Push days: 1 tricep movement (skull crushers or overhead extension), 3 sets of 8 to 12 reps. The compound pressing already trains the triceps heavily.
- Pull days: 1 to 2 bicep movements (barbell curl, hammer curl), 3 sets each of 8 to 12 reps. The compound pulling already trains the biceps.
Common Arm-Training Mistakes
1. Going too heavy
Heavy curls with body english are the most common cause of bicep tendonitis. Use a weight you can control through full range with strict form. The biceps grow on tension, not on numbers.
2. Neglecting the long head of the tricep
Most pushdowns and close-grip benches train the lateral and medial heads of the tricep. The long head specifically requires overhead-position work (skull crushers, overhead extensions) to grow fully. Without those, the tricep looks underdeveloped from the side.
3. Too many isolation, too few compounds
Three different curl variants and four different pushdown angles in the same session is overkill. Build the arms with 1 to 2 compound lifts (close-grip bench, dip, barbell curl) and 1 to 2 isolation finishers. Volume diluted across many exercises produces less growth than concentrated volume on a few productive ones.
4. Not progressing
Arm exercises plateau easily because lifters do not track them. The barbell curl needs to go up over months. The close-grip bench needs to go up. Without tracking and progressive overload, arm work becomes maintenance instead of growth.