Your arms are more than the biceps and triceps. A real arm day also hits the forearms, the delts, and the traps that tie your upper body together, and machines make that easier to do with clean form than free weights do.
I like machines for arms because they take balance and stabilization out of the picture. You can load the target muscle and chase a hard contraction without your form falling apart on the last few reps. They’re forgiving for beginners, and they let stronger lifters grind close to failure safely.
Here are the 7 arm machines I’d actually use at the gym, what each one trains, and how to get the most out of it. Mix them with some free weights and bodyweight work and you’ll cover every muscle in the arm.
Table of Contents
- 1 The 7 Best Arm Machines at the Gym
- 2 Anatomy of Arm Muscles
- 3 FAQs About Arm Muscles
- 4 Key Takeaways
- 5 Other Alternative Exercises
- 5.1 The 9 Best Barbell Row Alternatives
- 5.2 The 10 Best Box Jump Alternatives
- 5.3 The 9 Best T-Bar Row Alternatives
- 5.4 The 10 Best Overhead Press Alternatives
- 5.5 The 9 Best Pendlay Row Alternatives
- 5.6 The 10 Best Bulgarian Split Squat Alternatives
- 5.7 The 8 Best Hammer Curl Alternatives
- 5.8 The 10 Best Pallof Press Alternatives
- 5.9 The 10 Best Plank Alternatives
- 5.10 The 9 Best Seated Cable Row Alternatives (2023)
- 5.11 The 10 Best Lying Leg Curl Alternatives
- 5.12 The 10 Best Glute Bridge Alternatives
- 5.13 The 7 Best Deadlift Alternatives
- 5.14 The 10 Best Bent Over Row Alternatives
- 5.15 The 9 Best Lunge Alternatives
The 7 Best Arm Machines at the Gym
- Tricep extension machine
- Preacher curl machine
- Cable machine
- Tricep dip station
- Assisted pull-up machine
- Seated overhead press
- Seated dip machine
There’s no single magic machine that builds your arms for you, so a little variety goes a long way. Below I’ll walk through how each one benefits you and how to use it without wasting reps.
Tricep Extension Machine
Tricep extensions build the strength that carries over to your bench and overhead press, and they’re one of the cleaner ways to isolate the triceps. The machine works:
- Medial tricep head
- Anterior deltoid
- Forearm
The guided range of motion makes it a good fit for beginners and stronger lifters alike.
Benefits of the Tricep Extension Machine
- Lower risk of injury. Free weights don’t guide the path, so a sloppy rep under load can tweak something. The machine keeps you on rails and lets you load the medial head without your form breaking down.
- Works for any level. Beginners can learn the contraction without balancing a bar, and stronger lifters can grind the last few reps close to failure safely.
Tips for the Tricep Extension Machine
- Keep a natural grip. Don’t bend your wrists as you press. Let the triceps do the work.
- Use a full range of motion. Don’t overextend, and don’t let the bar crash into your chest. Keep tension on the triceps even at the top of the rep.
- Don’t use momentum. Jerking the weight yanks your joints and pulls load off the muscle. Control every rep.
Here’s a clean walkthrough of the seated machine tricep extension from Live Lean TV.
Tricep extension machine exercises for arms
This machine is simple. It repeats one movement that focuses on the upper arm instead of working several upper body muscles at once. You’ll see versions with the grab bars facing up or sideways, but they all work the same way.
Sit comfortably without slouching, and rest your back on the backrest if the model has one. Adjust the seat for comfort and set the weight to something you can manage. Rest your elbows on the pad with your arms slightly raised and bring the bars toward your head. On the sideways-bar models, keep your palms facing down so the work stays on the triceps instead of the biceps.
Preacher Curl Machine
The preacher curl machine isolates the biceps better than almost anything, which is why we also picked it as one of the best gym machines for biceps. If you’re deciding between this and a standard curl, our preacher curl vs bicep curl breakdown covers it. The machine works:
- Bicep brachii
- Brachialis
- Forearm flexors
Benefits of the Preacher Curl Machine
- Hard bicep isolation. The pad pins your upper arms so the biceps do all the work, which makes it a great pick for supersets.
- More load, less strain. You can go heavier than free-weight curls while the support takes pressure off your elbows and shoulders.
- Steady and stable. Seated with your arms braced, the movement stays smooth and your form holds up rep after rep.
Tips for the Preacher Curl Machine
- Keep it natural. Don’t force a rep your wrists don’t like, even when you’re chasing heavier weight.
- Don’t rest the arm flat. Keep a slight bend so your forearm stays just off the pad and tension stays on the bicep.
To see the form to hold on a preacher curl, check out this video:
Preacher curl machine exercises for arms
The machine preacher curl doesn’t have much variation unless you run it with free weights, so its job is narrow. That doesn’t make it any less useful. Slow the reps down to crank up the intensity and you’ll get plenty out of it. Using it is simple: pick your weight, rest your elbows on the pad, and curl the bars up until your arms are vertical.
Cable Machine
No list of the best arm machines is complete without the cable machine. One station curls your biceps, presses down your triceps, and hits the delts and traps too, and you can use it as a variation of the seated row. The key muscles it targets:
- Biceps
- Triceps
- Trapezius muscles
- Abs
- Pectorals
- Deltoids
Benefits of the Cable Machine
- Versatility. Few machines do this much, from curls to pressdowns to rows, which is why the cable machine was an easy choice for our list of the best upper body gym machines.
- Customizable. Swap handles and bars and you can set up almost any arm exercise comfortably, which is a big part of why it’s a gym favorite.
Tips for the Cable Machine
- Match the attachment and height. Every exercise has its own setup, so use the right handle at the right pulley height for what you’re doing.
- Control the negative. Don’t let the stack clang down. Lower it slowly to keep the muscle working the whole way and make the set count.
If the attachments and setup feel like a lot, here’s a rundown of effective cable arm exercises to get you started:
Cable machine exercises for arms
- Reverse grip pressdown. This one targets the triceps and fires all three heads. Grip a bar attachment with your palms facing up, set the cable at head height or above, and press down.
- Cable French press. Set the cable above your head, stagger your feet, and feel the triceps stretch through the full range. You can also set the cable low and pull it behind you while seated, which keeps the focus on the triceps.
- Rope pressdown. Pick your weight, set the cable above your head, and use the rope attachment to press down from the shoulders to below the hips, then return under control. It works the triceps, forearms, biceps, delts, and abs in one movement.
For more angles, see our full guide to cable arm exercises.
Tricep Dip Station
Dips are one of the most basic yet effective bodyweight builders, which makes the tricep dip station a simple piece of kit that builds real upper-body strength. The muscles it works:
- Triceps
- Deltoids
- Core
- Shoulders
Benefits of the Tricep Dip Station
- Better posture. Along with the triceps it works the core, shoulders, and some back, so it trains the whole upper body in one movement and helps you stand up straighter.
- Fits any program. Dips work as straight bodyweight training or as a hard finisher on a weights day, so they slot into most plans.
Tips for the Tricep Dip Station
- Brace your core. A tight core keeps your form clean and gets more out of every set.
- Don’t lock out. Locking your elbows between reps dumps the tension and defeats the point. Keep a slight bend and stay over the bars as you lower.
It’s one of the simpler pieces of equipment in the gym, but here’s a video on the best and safest way to use it.
Tricep dip station exercises for arms
Tricep dips train the whole upper body in a simple movement that needs no complicated machine. Grab the handlebars, slowly raise yourself, bend your knees, and lower your body, then repeat to finish the set. If dips bother your shoulders, our tricep dip alternatives cover swaps that train the same muscles.
Assisted Pull-up Machine
Pull-ups are one of the best ways to build upper-body strength, and the assisted pull-up machine gets you there if you can’t yet do them on your own. The muscles worked:
- Biceps
- Triceps
- Posterior deltoid
- Trapezius
Benefits of the Assisted Pull-up Machine
- Builds the pattern. The counterweight guides you through a clean pull-up so beginners can groove the movement and add strength without ugly, jerky reps.
- Hits a lot at once. It loads the back, biceps, triceps, and shoulders together, which sets you up for harder pulling later.
Tips for the Assisted Pull-up Machine
- Stay controlled. Pull up smoothly and lower the same way. Engage your back and arms so you don’t drop out of the top.
- Hold your line. Keep your shoulders stacked over your hips so every target muscle stays involved on each rep.
See more tips on how to use the assisted pull-up machine in this video.
Assisted Pull-up exercises for arms
This might be the easiest machine on the list, since it just adds a counterweight to assist a regular pull-up. Keep a solid grip and good posture and you’re set. Once you can do a few unassisted, or if the machine’s taken, our pull-up alternatives give you other ways to build the same strength.
Seated Overhead Press
The seated overhead press machine is mostly known for the shoulders, but it isn’t the only muscle it hits. The others worked by this machine:
- Triceps
- Upper pectorals
Benefits of the Seated Overhead Press Machine
- Upper-body focus. You’re not fighting for balance, so the work goes straight into the shoulders, triceps, and upper chest for size and strength.
- Easy to keep form. Free-weight presses fall apart once you fatigue, which is when you risk hurting yourself. The machine holds the path so you can press with good form.
Tips for the Seated Overhead Press Machine
- Press with intent. Keep your chest tall and take a breath before each rep. Don’t let the weight rest at the bottom.
- Stay tight at the top. Don’t lock your elbows. Keep tension on the muscle and raise the bar under control.
Here’s a video that shows the form to use:
Seated overhead press machine exercises for arms
Run the seated overhead press in a smooth, controlled motion. Hold a strong grip on the handlebars with your elbows bent, then raise them gently above your head. Keep every rep smooth and hold tension in the triceps the whole time, even at the bottom.
Seated Dip Machine
If you want a high-impact exercise that doesn’t burn out the rest of your body, the seated dip machine is it. The machine isolates the:
- Triceps
- Pectorals
- Trapezius
Benefits of the Seated Dip Machine
- Clean isolation. It loads the triceps mainly while bringing in the pecs and traps, so your sets stay purpose-driven whether you’re after strength or size.
- Easy to balance. Unlike a bench dip, your bodyweight isn’t all on your arms, so it’s safer, and being able to load it lets you take the exercise heavy.
Tips for the Seated Dip Machine
- Stay still. Keep your feet flat and your elbows tucked. If that’s hard, start lighter and build up.
- Engage the core. Brace as you press to keep your shoulders from slouching and get more out of every rep.
To see what’s expected before you try it, take a look at this video:
Seated dip machine exercises for arms
Like most simple arm machines, the seated dip machine doesn’t have many variations. The way to make it tougher is to add weight and slow the reps down. It’s basically a loaded version of the traditional dip station that you do seated, which makes it a solid compound tricep exercise when you want more than isolation work.
Using it is simple. Adjust the seat so your elbows sit at a 90-degree angle, then press down steadily and return gently to the start. Don’t let your elbows lock at the bottom before you come back up.
Anatomy of Arm Muscles
The upper arms consist of the biceps, triceps, and deltoid muscles. Of these muscles, the biceps and triceps are often given the most attention at the gym but this does not make them more important. The deltoid helps prevent injury to the shoulder by providing protection and stability.
Bicep & Triceps
The more common muscle group’s anatomy can further be broken down into different individual muscles that can be worked out either individually or collectively. Take the bicep muscle group for example, it can be broken down into three distinct muscles namely the long head, short head, and brachialis. The triceps are also made up of three muscles which are colloquially termed the long, medial, and lateral head.
Forearm
Lower down the arm, we get the forearm which has flexors, extensors, and the brachioradialis. All of these muscles play a different role in improving grip strength for upper arm workouts – whether on gym machines or when using free weights.
FAQs About Arm Muscles
Arm machines are very effective for isolating muscles and ramping up the loading capacity. The fixed nature of most machines enables movements to be fluid and makes it easy to achieve maximum results with minimal risk of injury. These machines are useful to both beginners and experienced gym-goers.
Some muscles are just stubborn to develop, and there is nothing you can do about this but focus more on them at the gym. These muscles include forearms, obliques, calves, and lower abs. These muscles also take a while to recover after being worked out at the gym which explains their stagnant growth. The triceps can also take longer to build if you do not do workouts that engage all three heads of this muscle group.
This question does not have a simple answer since many variables play a role. For example, it depends on your fitness level and goals. You should also consider if there is a good mix between the two workout forms or if it’s a binary either/or situation. However, when it comes to safe workouts to prevent injury, machines trump free weights by a long shot.
It might be best to have a healthy mix of these two types of exercises depending on your fitness goals instead of sticking religiously to one.
Key Takeaways
If you’re chasing biceps, the preacher curl machine is the one to camp on. For triceps, the seated dip machine and the tricep extension machine give you the cleanest isolation, while the cable machine covers both arms and the most exercise variations. New to the gym? Start on the assisted pull-up machine and the tricep extension machine, since both guide the movement while you build strength. Pick the two or three that fit your goal and your gym, then round them out with free weights.
Other Alternative Exercises
If you enjoyed this post, check out our other roundups of the best alternatives for other exercises.
