Arm Day Workout: Complete Bicep and Tricep Guide
Arm Day Workout: Complete Bicep and Tricep Guide
An arm day workout builds the bicep and tricep mass that no compound movement alone fully develops. Pull-ups and rows produce lat and rhomboid thickness; bench press and overhead press produce chest and shoulder mass — but neither movement pattern applies sufficient isolated tension to the bicep long head, the tricep long head, or the brachialis to maximize arm size. A dedicated arm day workout fills that gap with direct, high-volume work structured around the exercises that load each muscle through its full range at the highest tension point.
This guide covers the anatomy of the biceps and triceps, the best exercises for each muscle group ranked by loading potential and activation research, complete arm day workout session templates for use as standalone sessions or as finishers within any split, technique cues that determine whether the target muscle is actually doing the work, and the most common errors in arm training that prevent arm size from keeping pace with the rest of the physique. Whether you run a dedicated arm day workout once or twice per week, or add arm work as an accessory block to push and pull days, this is the complete reference.
What an Arm Day Workout Develops
Long Head and Brachialis
Bicep peak — the height of the bicep when flexed — comes primarily from the long head of the biceps brachii and the brachialis underneath it. Incline dumbbell curls and hammer curls are the most effective exercises. An arm day workout that neglects the brachialis and long head produces arms that look flat from the side regardless of total bicep size.
Long Head Thickness
The triceps account for roughly two-thirds of upper arm circumference. The long head — the largest of the three heads — is only fully loaded when the arm is raised overhead, making overhead tricep extension a non-negotiable movement in any productive arm day workout. Close-grip bench press and pushdowns alone do not sufficiently load the long head.
Volume and Tension Combined
Arm size responds to volume — more so than most other muscle groups. Research supports 12 to 20 weekly sets per muscle group for trained lifters targeting arm hypertrophy. An arm day workout concentrating 10 to 14 sets of bicep and 10 to 14 sets of tricep work into a single session allows maximum volume accumulation with higher per-set effort than isolation work spread across compound sessions.
What This Guide Covers
This is a complete reference for arm day workout programming covering anatomy, exercise selection, session templates, and technique. It does not cover compound pressing or pulling movements that secondarily involve the arms.
What You Will Learn
- Bicep and tricep anatomy — which heads do what
- Best exercises for bicep peak, thickness, and width
- Best exercises for tricep long, lateral, and medial head
- Complete arm day workout session templates
- Rep ranges and set volumes for arm hypertrophy
- Technique cues for isolation and muscle activation
- How to fit arm day workout into a split
- Common arm training errors and corrections
Outside This Article
- Full split programs — see 4-Day Workout Split
- Compound pulling for back — see Upper Back Workouts
- Progressive overload principles — see Progressive Overload Explained
- Training volume science — see Training Volume Explained
- Recovery between arm sessions — see Recovery and Fatigue
Arm Muscles: What an Arm Day Workout Actually Trains
An effective arm day workout requires understanding which muscle each exercise targets and why. The upper arm contains five muscles of training relevance — two on the front, three on the back — each with distinct functions, optimal loading angles, and exercises that produce significantly more stimulus than alternatives. Training all of them requires deliberate exercise selection, not simply alternating between curls and pushdowns.
Biceps Brachii — Long Head
The long head of the biceps runs along the outer arm and is the primary contributor to bicep peak when flexed. It is maximally stretched — and therefore maximally loaded — when the upper arm is behind the body (as in an incline curl). An arm day workout that lacks incline curls or behind-the-body cable curls consistently underloads the long head, producing less peak development regardless of total curl volume.
Biceps Brachii — Short Head
The short head runs along the inner arm and contributes to bicep width and the fullness visible from the front. It is most effectively loaded when the upper arm is in front of the body — as in a preacher curl or a concentration curl. An arm day workout that includes both incline curls (long head emphasis) and preacher curls (short head emphasis) develops both the peak and the inner fullness of the bicep.
Brachialis
The brachialis lies beneath the bicep brachii and is the primary elbow flexor. Its development pushes the bicep upward, increasing arm peak visibility even without additional bicep growth. The brachialis is most effectively trained with a neutral grip — hammer curls and neutral-grip cable curls — because a neutral grip reduces bicep supination and forces the brachialis to carry more of the load. It is the most neglected muscle in a typical arm day workout.
Triceps — Long Head
The long head is the largest of the three tricep heads and crosses both the elbow and shoulder joints. It is only fully lengthened — and therefore maximally loaded — when the arm is raised overhead. Overhead tricep extensions (dumbbell, cable, EZ-bar) are non-negotiable in an arm day workout targeting long head mass. Close-grip bench press and pushdowns apply significant tension at the contracted position but insufficient tension at the stretched position of the long head.
Triceps — Lateral Head
The lateral head runs along the outer arm and is the most visible tricep head from the side. It does not cross the shoulder joint and is therefore maximally loaded at the elbow extension range — making pushdowns and close-grip pressing the most effective exercises. In an arm day workout, the lateral head is typically well-developed relative to the long head in lifters who prioritize pressing movements, since it is secondarily loaded in all pressing exercises.
Triceps — Medial Head
The medial head lies deepest of the three heads and contributes to overall tricep thickness rather than visible surface definition. It is loaded across all tricep movements and rarely requires specific targeting in an arm day workout — it is the least likely head to become a limiting factor in arm development. Reverse-grip pushdowns and underhand extensions increase medial head activation but are supplementary to the primary tricep exercises.
A complete arm day workout must include: incline or behind-body curls for the bicep long head, preacher or concentration curls for the short head, hammer curls for the brachialis, overhead tricep extension for the tricep long head, and pushdowns or close-grip pressing for the lateral head. No single exercise covers all five targets.
Best Exercises for an Arm Day Workout
The following tables rank the most effective exercises by muscle target, optimal rep range for hypertrophy, and the specific technique cue that determines whether the intended muscle is actually doing the work. The most productive arm day workouts select two to three exercises per muscle group from different categories — not three variations of the same movement pattern.
Bicep Exercises — Peak, Width, and Thickness
| Exercise | Primary Target | Rep Range | Key Technique Cue |
|---|---|---|---|
| Barbell Curl | Biceps brachii (both heads) | 6–10 | Elbows stay pinned at sides throughout; no shoulder swing to initiate the rep — reduces bicep tension instantly |
| Incline Dumbbell Curl | Biceps long head | 10–15 | Bench at 45–60 degrees; arm hangs behind body at bottom — this is the stretch position that loads the long head; supinate fully at top |
| Preacher Curl (EZ-bar or Dumbbell) | Biceps short head | 10–15 | Full extension at bottom — do not cut range; upper arm against pad stays fixed; the movement is elbow flexion only |
| Hammer Curl | Brachialis, brachioradialis | 10–15 | Neutral grip (thumbs up) throughout — no supination; can be performed alternating or simultaneously, seated or standing |
| Concentration Curl | Biceps short head, peak | 12–15 | Upper arm braced against inner thigh; elbow does not move; supinate hard at top and hold for one second |
| Cable Curl (Low Pulley) | Biceps brachii | 12–15 | Constant cable tension maintains load at both the stretched and contracted position — superior to dumbbells for tension at the bottom |
Tricep Exercises — Long Head, Lateral Head, and Overall Mass
| Exercise | Primary Target | Rep Range | Key Technique Cue |
|---|---|---|---|
| Close-Grip Bench Press | Triceps overall, lateral head | 6–10 | Grip shoulder-width (not narrower); elbows track at 45–60 degrees from torso — not flared wide; highest-load tricep movement |
| Overhead Tricep Extension (Dumbbell or EZ-bar) | Triceps long head | 10–15 | Elbows point straight up — do not flare; lower weight behind head until full stretch; non-negotiable movement for long head mass in any arm day workout |
| Cable Overhead Extension | Triceps long head | 12–15 | High pulley, facing away; rope or bar; constant tension at the stretched position superior to dumbbell version; elbows stay parallel |
| Skull Crusher (EZ-bar) | Triceps long head, lateral head | 10–15 | Lower bar to forehead or slightly behind head — not to chin; behind-head version increases long head stretch significantly |
| Cable Pushdown (Straight Bar or Rope) | Triceps lateral head | 12–20 | Rope: hands separate at bottom and pronate for peak contraction. Bar: elbows pinned; only forearms move; full extension at bottom |
| Tricep Dip (Weighted or Bodyweight) | Triceps overall | 8–12 | Upright torso, elbows back — not flared; lean forward shifts load to chest; stay vertical for tricep emphasis |
Arm Day Workout Templates: Complete Sessions
The following arm day workout templates cover two formats. The first is a full standalone arm day workout session — 60 to 75 minutes — designed to run once or twice per week as a dedicated arm training day within a 4-day or 5-day split. The second is a compact arm day workout finisher — 25 to 30 minutes — designed to be added after a pull or push session to top up arm volume without running a full dedicated session. Both follow the same structural logic: heaviest loaded movement first, stretch-emphasis exercises second, pump and isolation finishers last.
Peak, Width, Brachialis
- Barbell Curl4 × 6–8 — lead compound movement
- Incline Dumbbell Curl3 × 10–12 — long head stretch
- Hammer Curl3 × 10–12 — brachialis emphasis
- Preacher Curl (EZ-bar)3 × 12–15 — short head peak contraction
- Cable Curl (Low Pulley)3 × 15 — constant tension finisher
Long Head, Lateral Head, Mass
- Close-Grip Bench Press4 × 6–8 — lead compound movement
- Overhead DB Extension3 × 10–12 — long head stretch
- Skull Crusher (EZ-bar)3 × 10–12 — long and lateral head
- Cable Pushdown (Rope)3 × 12–15 — lateral head contraction
- Cable Overhead Extension3 × 15 — long head constant tension
3 Exercises, 10 Sets
- Incline Dumbbell Curl3 × 10–12
- Hammer Curl3 × 12
- Cable Curl4 × 15
3 Exercises, 10 Sets
- Overhead DB Extension3 × 10–12
- Cable Pushdown (Rope)3 × 12–15
- Cable Overhead Extension4 × 15
3 Supersets, 12 Sets Total
- Superset 1Barbell Curl + Skull Crusher — 4 × 10
- Superset 2Hammer Curl + Cable Pushdown — 4 × 12
- Superset 3Preacher Curl + OH Extension — 4 × 12–15
6 Rules for a Productive Arm Day Workout
Arm training has specific requirements that differ from compound movement programming. These six rules address the points where arm day workout sessions most commonly fail to produce the expected results.
Include an Overhead Tricep Movement in Every Arm Day Workout
The tricep long head — the largest of the three tricep heads — is only fully lengthened when the arm is raised overhead. No amount of pushdown or close-grip bench press volume fully compensates for the absence of overhead extension work in an arm day workout. Research consistently shows that exercises performed at long muscle lengths produce superior hypertrophy to those performed at shortened positions. Overhead tricep extension is not optional if long head mass is the goal.
Include an Incline or Behind-Body Curl in Every Arm Day Workout
The bicep long head — the primary contributor to bicep peak — is maximally stretched when the upper arm is positioned behind the torso. Standard standing curls with the arm at the side provide a partial stretch at best. An arm day workout that opens with barbell curls and closes with cable curls without including an incline dumbbell curl or high-cable curl will consistently underdevelop the long head. One stretch-emphasis bicep exercise per arm day workout session is the minimum.
Train Brachialis Directly With Hammer Curls
The brachialis lies beneath the bicep and physically pushes the bicep upward as it develops — increasing peak height without the bicep growing larger. It is primarily developed with a neutral grip (hammer curl, neutral-grip cable curl, cross-body hammer curl) because a neutral grip reduces the bicep’s supination advantage and forces the brachialis to carry the load. An arm day workout without neutral-grip curling leaves the single best lever for improving bicep peak appearance undertrained.
Superset Biceps and Triceps to Maximize Volume per Hour
Bicep and tricep movements are anatomically antagonistic — one flexes the elbow while the other extends it. Supersets pairing a bicep exercise with a tricep exercise allow one muscle group to rest while the other works, with no reduction in performance quality for either. This approach reduces arm day workout duration by 20 to 30 percent without reducing total volume. Research on antagonist supersets shows no meaningful impairment in strength or hypertrophic stimulus compared to straight sets.
Use Rep Ranges of 10–15 for Most Arm Day Workout Sets
Arms respond to moderate to high rep ranges more predictably than larger muscle groups. Sets of 10 to 15 reps allow sufficient load to produce mechanical tension while enabling the full range of motion and controlled tempo needed for proper isolation. Very heavy, low-rep work (three to five reps) on curls and extensions reduces mind-muscle connection and increases momentum contribution. Open the arm day workout with a heavier compound movement (barbell curl, close-grip bench at six to eight reps) then move to the 10 to 15 range for isolation work.
Apply Progressive Overload Weekly
An arm day workout that uses the same weight for the same reps every session will plateau within four to six weeks. Progressive overload for arm training follows the same logic as any other muscle group: add one to two reps per set each week until the top of the rep range is exceeded consistently, then increase the weight by the smallest available increment and repeat. Isolation exercises progress in smaller increments than compound movements — 1 to 2 kg per step on curls is normal and should not be rushed. See Progressive Overload Explained.
Common Mistakes in Arm Day Workout Training
Arm training is one of the most commonly performed and consistently underperforming areas of most programs. The same errors appear repeatedly across all experience levels.
- Load Error Using Momentum Instead of Bicep Force to Curl the WeightThe most widespread technique failure in an arm day workout is swinging the torso to initiate the curl, allowing momentum to carry the weight through the first 30 to 40 degrees of the movement where the bicep tension is highest. This is invariably caused by using a weight that is too heavy for strict execution. Reducing the barbell curl weight by 20 percent and performing each rep with the upper arm pinned at the side — no forward shoulder movement at the start — produces more bicep stimulus per rep than the heavier momentum-assisted version.
- Selection Error Running Five Curl Variations With No Overhead Tricep WorkA common arm day workout structure among lifters who prioritize bicep appearance over total arm size: four to five curl variations, three pushdown variations, zero overhead tricep extensions. The result is underdeveloped tricep long heads — the largest portion of the arm — and a flat tricep profile despite high total tricep volume. The triceps are approximately two-thirds of upper arm circumference. An arm day workout with more bicep sets than tricep sets at greater length consistently produces smaller arms than a balanced approach.
- Range Error Cutting the Range of Motion at the Bottom of CurlsStopping the curl before full elbow extension — keeping a bend at the bottom to maintain tension — eliminates the most mechanically productive position of the movement: the fully lengthened bicep under load. Research on muscle growth consistently shows that exercises performed through full range, particularly at the stretched position, produce greater hypertrophy than partial-range equivalents. Every curl in an arm day workout must begin with the arm fully extended and the bicep under stretch.
- Volume Error Performing Too Few Weekly Sets to Drive HypertrophyThe arm muscles are small relative to the back and legs and recover faster — but they still require sufficient weekly volume to grow. Lifters who rely entirely on the secondary bicep stimulus from rows and the secondary tricep stimulus from pressing, without adding direct arm work, typically plateau in arm size within the first 12 to 18 months of training. A dedicated arm day workout of 12 to 16 sets per muscle group per week — split across one or two sessions — provides the direct volume that compound movements alone cannot replace.
- Execution Error Performing Pushdowns With Elbows Flaring Away From the BodyIn a cable pushdown, the elbows must stay pinned at the sides throughout the movement. When the elbows flare outward or move forward during the push, the shoulder joint contributes to the movement and the tricep shortens its working range. The result is a partial tricep extension rather than a full one. This error is most common at heavier loads — the correct response is to reduce the weight until both elbows stay stationary and the forearm completes the full arc from the starting angle to full extension at the bottom of every rep.
Research and Authoritative Sources
Exercise selection, loading angles, and volume recommendations throughout this guide are based on peer-reviewed research in exercise science and muscle physiology.
- Schoenfeld BJ et al. Effects of different volume-equated resistance training loading strategies on muscular adaptations in well-trained men. Journal of Strength and Conditioning Research. 2014. — PubMed
- Kassiano W et al. Which ROM leads to greater muscle hypertrophy? A systematic review and meta-analysis. Journal of Strength and Conditioning Research. 2022. — PubMed
- Maeo S et al. Triceps brachii hypertrophy is substantially greater after elbow extension training performed in the overhead versus neutral arm position. European Journal of Sport Science. 2021. — PubMed
- Schoenfeld BJ, Grgic J. Effects of range of motion on muscle development during resistance training interventions: a systematic review. SAGE Open Medicine. 2020. — PubMed
- Robbins DW, Young WB, Behm DG. The effect of an upper-body agonist-antagonist resistance training protocol on volume load and efficiency. Journal of Strength and Conditioning Research. 2010. — PubMed
- American College of Sports Medicine. ACSM’s Guidelines for Exercise Testing and Prescription. Resistance training for muscular hypertrophy — volume and frequency. — ACSM
Arm Day Workout: What to Take Away
A dedicated arm day workout produces arm size that compound movements alone cannot fully develop — not because rows and presses do not load the biceps and triceps, but because secondary loading through compound movements does not apply sufficient isolated tension to the long head of both muscles, the brachialis, or the short head of the bicep to maximize development across all heads. The gap is real, and a well-structured arm day workout fills it efficiently.
The structural requirements of a productive arm day workout are specific: one stretch-emphasis bicep exercise (incline curl, behind-body cable curl), one brachialis movement (hammer curl), one preacher or concentration curl for the short head, one overhead tricep movement (non-negotiable for long head mass), one skull crusher or close-grip pressing movement, and one pushdown for the lateral head. These six movements cover all the targets that most arm training programs miss.
Superset bicep and tricep exercises to make the arm day workout time-efficient. Apply progressive overload every session. Train through the full range of motion on every rep, especially at the stretched position. The lifters who build the most arm size are rarely the ones doing the most volume — they are the ones applying the most tension to the right muscles, through the right range, with the right exercises for each head of each muscle.
Related: Upper Back Workouts · 4-Day Workout Split · 3-Day Workout Split · 5-Day Workout Split · What Builds Muscle · Progressive Overload · Training Hub · Start Here
For Educational Purposes Only
The exercise recommendations and programs in this article are based on published research in exercise science and are intended for general educational purposes only. Individual responses to training vary based on anatomy, training history, recovery capacity, and nutrition. Nothing in this article constitutes personalized exercise or medical advice.
If you have an existing elbow, shoulder, or wrist condition, consult a qualified sports medicine professional or physical therapist before beginning any new arm training program. For more on how this site approaches evidence-based content, see our About page and Disclaimer.
