An Arm Workout You’ll Feel Until Next Week (8-Week Arm Builder)

Bust open your sleeves with this brutal biceps + triceps arm routine

If you want bigger arms, you don’t need a thousand curl variations—you need better execution, smarter structure, and enough intensity to force adaptation. The truth is most “arm days” are just a few lazy biceps curls and triceps pushdowns thrown together with long rest periods and zero intent. This arm workout is different.

You’ll train biceps and triceps with antagonistic supersets, stay in the hypertrophy rep range, and finish most movements with rest-pause sets to drive more volume without turning the workout into a 2-hour marathon. You’ll also hit forearms and grip so your arms look thick from wrist to shoulder.

If you can still easily touch your shoulder after this session… you didn’t earn it. In this post, we are take a look at an eight week arm workout that you will feel until next week.

Also Read: 5 Ways To Bring Up A Lagging Body Part

Workout Principles For an Insane Arm Workout

Arms are a relatively smaller muscle group when you compare them to others like chest and back. While you do not need as much intensity while training your guns as you would while training some of the bigger body parts, do not use this as an excuse to show them mercy. Here are the principles you should be following during your arm workout:

1. Antagonistic Supersets (Biceps + Triceps)

Lifters tend to train their favorite muscle group at the beginning of a workout. While some people train biceps at the beginning of their arm workout, others start with triceps. The problem with this technique is that by the time you get to training your weaker muscle group, you are fatigued, and do not have enough gas left in the tank to break new ground. 

Not only do antagonistic supersets lay the groundwork for biceps and triceps muscular balance, but they also are time efficient.  

2. Hypertrophy Rules (12–15 reps, short rest)

Hypertrophy refers to an increase in muscular size achieved through exercise. To achieve hypertrophy, you should perform 12-15 reps per exercise and not rest more than 60-90 seconds between sets. In this arm workout, you will not be stopping for rest between exercises while performing the antagonistic supersets. 

Remember: Do not lift a weight that is too light, as that will not allow you to see the same gain of definition.

Related: 5 Ways To Write a Great Training Program

3. Rest-Pause Sets (extra reps, extra growth)

Most individuals usually perform 12-15 reps in a set. After a few training sessions, people get a good idea of how much weight they need to be lifting to hit muscular failure by 12-15 reps. While there is nothing wrong with this technique, you need to remember that we are on a mission to remain sore until our next arm workout. We want to push our arms to their limit. 

Rest-pause sets give your ATP (adenosine triphosphate) reserves enough time to replenish so that you can perform an additional 5-10 reps without getting you out of hypertrophy. 

Muhammad Ali explained this the best when he said: “I don’t count my sit-ups; I only start counting when it starts hurting because they’re the only ones that count.”

Also Read: How To Increase The Time Under Tension To Maximize Your Gains

4. No Accessory Muscles Here (Forearms matter) 

Forearm training is an afterthought in most arm workouts, but this routine is unlike most regimens. Bodybuilding is a game of illusions. Muscular forearms and small joints (if you have them) can give an illusion of bigger arms. Stick with this arm workout for 12 weeks, and you might end up looking like The Hulk – at least in the arms department. 

Check Out: Advanced Training Techniques To Take Your Gains To The Next Level

5. Mind-Muscle Connection (don’t just move weight)

Bodybuilding is not about lifting as heavy as you can or just going through the motions for the sake of it. If you want your biceps to look like mountain peaks and triceps to resemble horseshoes, you need to focus on contracting your muscles with every rep. 

The better your mind-muscle connection, the more muscle fibers you will be recruiting during your exercises. A higher degree of muscle activation also means that you lower the chances of injuries during your sets. 

You should not turn your rest periods between sets into dead time. Utilize that time to flex your muscles as hard as you can and hit your favorite poses. 

Related: 6 Ways To Improve Your Mind-Muscle Connection

6. Shock Your Arms Into Responding

Don’t run the exact same workout for months on autopilot. Stay consistent with the structure, but progress by:

• adding load slowly,
• tightening rest times,
• improving reps at the same weight,
• or increasing control/tempo.

Must Read: This is How Your Training Should Change as You Get Advanced

8 Week Arm Workout (Supersets + Rest-Pause)

Frequency: 1–2x per week
Goal: Arm hypertrophy (size + density)
Rest between exercises in a superset: none
Rest after each full superset: 30–60 seconds
Rest-Pause: 10 seconds + 8–10 reps (most exercises)

1. Superset: (a) Standing Bicep Cable Curl: 3 sets 12-15 reps, no rest

Steps:

1. Adjust the pulley to the lowest setting. 
2. Attach a straight bar to the pulley. 
3. Grab the bar with a supinated (palms facing up) grip and stand upright with a shoulder-width stance.
4. While keeping your elbows pinned to your sides, curl the bar toward your chest.
5. Hold and contract your pythons at the top for a couple of seconds.
6. Return to the starting position with a slow and controlled motion. 
7. Repeat for recommended reps. 

(b) Straight Bar Tricep Pushdown: 3 sets 12-15 reps, 30-60 second rest

Steps: 

1. Attach a straight bar to a cable stack as high as possible.
2. Stand with an upright torso in a shoulder-width stance.
3. Grasp the straight bar with a pronated grip (palms facing down) and lean forward slightly by hinging at the hips.
4. Initiate the movement by extending your elbows and flexing the triceps.
5. Pull the handle down until your elbows are almost locked out.
6. Squeeze the life out of your triceps at the bottom of the movement.
7. Return to the starting position with a controlled motion. 
8. Repeat for repetitions.

• Rest-Pause: 10 seconds 8-10 reps

Every exercise in this workout routine (except forearm lifts) includes a rest-pause set. Meaning – after performing 12-15 reps of an exercise, rest for 10 seconds, and then perform 8-10 more repetitions of the same movement with the same weight before moving onto the next lift. 

2. Superset : (a) EZ Bar Skullcrusher: 3 sets 12-15 reps, no rest

This is no accident. You will be alternating between biceps and triceps as the first exercise of your supersets. This technique will ensure that you are training both muscle groups with the same intensity.

Steps:

1. Choose your desired weight and sit on the edge of a flat bench with the EZ bar on your lap. 
2. Lay back while lifting the bar to your chest.
3. Once in position, press the bar until your arms are fully extended and perpendicular to the floor. 
4. While keeping your elbows pinned in position, lower the weight towards your forehead by lowering your forearms. 
5. Once you are a few inches away from your forehead, reverse the movement by extending your elbows while flexing the triceps to lock out the weight.
6. Repeat for the desired number of repetitions.

(b) Zottman Curl: 3 sets 12-15 reps, 30-60 second rest

Steps:

1. Hold a pair of dumbbells by your sides with your palms facing each other.
2. Curl the weights up to your shoulders, keeping your upper arms still and turning your hands so your palms face up as you lift.
3. Pause at the top of the movement and slowly rotate your grip so your palms are facing downwards. 
4. Lower the dumbbells slowly back to the starting position using the overhand grip.
5. When the dumbbells are close to your thighs, turn your hands so that your palms are in the starting position facing one another.

• Rest-Pause: 10 seconds 8-10 reps

3. Superset: (a) Barbell 21s: 3 sets 12-15 reps, no rest

Steps:

1. Stand upright with a shoulder-width stance.
2. Grab a barbell and hold it in front of your thighs. 
3. While keeping your elbows pinned to your sides, curl the barbell to the halfway point (up to your belly button).
4. Return to the starting position and complete seven repetitions with this range of motion. 
5. Without pausing, curl the same weight all the way to the top, then lower the weight to the halfway point and back up again. Perform this for 7 reps.
6. Finally, perform 7 reps of full barbell curls from the bottom to the top.

(b) Dumbbell Kickback: 3 sets 12-15 reps, 30-60 second rest

Steps:

1. Position yourself on the left side of a flat bench with your right knee and right hand resting on the bench.
2. Using a neutral grip, pick up the dumbbell with your left hand. Keep your back straight and look forward.
3. Tuck your left upper arm close to your torso and bend at the elbow, forming a 90-degree angle with your upper arm and forearm. This is the starting position.
4. Moving only at the elbow, raise the dumbbell behind you until your arm is fully extended.
5. Pause, and then lower the dumbbell back to the starting position.
6. Repeat this movement for desired reps before switching sides.

• Rest-Pause: 10 seconds 8-10 reps

4. Superset

(a) Single-Arm Overhead Extension: 3 sets 12-15 reps, no rest

Steps:

1. Stand upright in a shoulder-width stance.
2. Grab a dumbbell with one hand and position it behind your head with the elbow flexed to 90-degrees.
3. Place your other hand on your side or abdomen for stability.
4. Press the dumbbell upward until your arm is fully extended. 
5. Pause and contract your tricep at the top of the movement. 
6. Repeat for recommended reps before switching sides.

(b) Dumbbell Hammer Preacher Curl: 3 sets 12-15 reps, 30-60 second rest

Steps:

1. Grab a dumbbell in each hand and sit on a preacher bench.
2. Keeping your elbows flexed and your palms facing each other (neutral or hammer grip), place the backs of your upper arms flat on the pad.
3. Lower the dumbbells in a slow and controlled motion until your arms are fully extended. 
4. Curl the dumbbells back to the starting position explosively.
5. Pause and contract your pythons at the top of the movement. 
6. Repeat for reps. 

• Rest-Pause: 10 seconds 8-10 reps

5. Superset: (a) Supinated Grip Pull-Up: 3 sets 12-15 reps, no rest

Steps:

1. Grab the pull-up bar with your hands roughly shoulder-width apart and your palms facing towards you.
2. Bring your shoulder blades down and contract your lats and biceps to pull up until your chin rises above the bar.
3. Pause at the top and squeeze your biceps.
4. Slowly return to the starting position and repeat.

(b) Diamond Push-Up (weighted): 3 sets 12-15 reps, 30-60 second rest

Steps:

1. Get on all fours with your hands together under your chest.
2. Position your index fingers and thumbs so that they are touching, forming a diamond shape.
3. Extend your arms so that your body is elevated and in a straight line.
4. Lower your chest towards your hands while ensuring you do not flare your elbows out to the sides.
5. Stop when your chest is a few inches away from the floor. 
6. Return to the starting position explosively. 
7. If the bodyweight version of this exercise feels too easy, feel free to add resistance by getting someone to place a weight plate on your upper back. 

• Rest-Pause: 10 seconds 8-10 reps

6. Triset: (a) Pull-Up Bar Hang (Dead Hang): 3 sets failure, no rest

Steps:

1. Use a step or bench so you can easily reach the bar. You shouldn’t jump into a dead hang. 
2. Grab the overhead bar with a shoulder-width overhand grip.
3. Hang on to the bar while keeping your arms straight. 
4. Hang for as long as you can.

(b) Farmer’s Walk: 3 sets 30 seconds, no rest

Steps:

1. Grab a dumbbell in each hand.
2. While standing tall, keeping your shoulders, back, and core tight, walk at an even pace for 30 seconds.

(c) Behind Back Cable Wrist Curl: 3 sets failure, 30-60 second rest

Steps:

1. Attach a straight bar to a low pulley. 
2. While facing away from the pulley, squat down, and grab the bar with a pronated grip. 
3. Squat back up and stand with a shoulder-width grip.
4. While keeping your arm straight, slowly open your hands and let the bar slide from inside your palms to the tip of your fingers.
5. Return to the starting position by clenching your fists so that the bar is raised into your palms.
6. Curl your wrists and hold for a count of two.
7. Return to the starting position and repeat for the desired number of repetitions. 

Common Mistakes

• Swinging curls (shoulders and lower back take over)
• Flaring elbows on pushdowns and push-ups
• Going too light “for the pump” every set
• Resting too long and losing tension
• Ignoring forearms and grip

FAQ

How often should I do this arm workout?

1–2 times per week is plenty. If you’re training arms twice, keep the second day lighter (less rest-pause volume).

Is the 12–15 rep range best for bigger arms?

It’s one of the most reliable ranges for hypertrophy, especially when paired with controlled reps, short rest, and progression over time.

What if I can’t do 12 pull-ups?

Do as many as possible with good form. Use an assisted pull-up machine or bands, or do slower negatives.

Conclusion

Disclaimer: It is absolutely normal for your arms to cramp up during the day after you perform this brutal arm workout. Get accustomed to the pain, and it will not be long before you put on an inch on your arms. Good luck!

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