Myo-Reps: What They Are and How to Use Them

Myo-reps are a form of rest-pause training developed by Norwegian strength coach Borge Fagerli in the mid-2000s. The method has since been adopted by coaches and programs worldwide, and Arnold Schwarzenegger highlighted it in his Daily Pump newsletter as one of his preferred training methods.

The concept is simple. Instead of doing three separate sets with long rest periods, you do one challenging set followed by several short mini-sets with minimal rest. You get more quality work done in less time.

How to Do Myo-Reps

Step 1: The Activation Set. Pick a weight you can lift for 12 to 20 reps with good form. Perform your reps with controlled technique, especially on the way down. Stop at 1 to 2 reps short of failure. You’ll know you’re close when rep speed slows noticeably.

Step 2: Rest. Rack the weight and take 3 to 5 deep breaths. That’s it. Roughly 10 to 20 seconds. Don’t count on a clock, just breathe.

Step 3: Mini-Sets. Perform 3 to 5 reps with the same weight. Don’t reduce the load. Take another 3 to 5 breaths and repeat.

Step 4: Stop when any of these happen: you can’t match the reps you hit on your first mini-set (got 5 on mini-set one but only 4 on mini-set three, stop there), you’ve completed 4 to 5 mini-sets, or your form starts breaking down.

That’s the whole method. Before your activation set, do 1 to 2 warm-up sets at progressively heavier loads (something like 5 to 8 reps, then 3 to 5 reps) to prepare the muscle and get a feel for your working weight that day. These are warm-ups, not working sets. Once you’re ready, the activation set plus your mini-sets is your entire working volume for that exercise. One myo-rep sequence replaces what you’d normally do as 2 to 3 traditional sets.

What It Looks Like in Practice

Here’s a real example on dumbbell lateral raises:

15 + 5 + 5 + 5 + 4 = 34 total reps in about two minutes.

Compare that to three traditional sets of 12 with two minutes rest between each. That takes about eight minutes and most of those reps aren’t particularly challenging until the last few of each set.

More examples of properly executed sequences:

12 + 4 + 4 + 4 + 4 (completed 4 mini-sets at target, done)

18 + 5 + 5 + 5 + 5 + 4 (completed 5 mini-sets, stopped at rep drop)

Sequences that went wrong:

12 + 4 + 4 + 3 + 3 + 2 (should have stopped at the first 3)

10 + 3 + 3 + 3 + 3 + 3 + 3 + 2 (way too many mini-sets)

The stopping rules are the most important part of the protocol. When reps drop, you’re done. Pushing past that point generates a lot of fatigue without proportional benefit.

Best Exercises for Myo-Reps

Myo-reps work best on isolation and machine exercises where setup is quick and form is easy to maintain under fatigue.

Great choices: lateral raises, bicep curls, tricep pushdowns, leg extensions, leg curls, calf raises, face pulls, cable flyes, machine rows, rear delt flyes.

Use with caution: moderate-load dumbbell compounds like dumbbell presses, rows, and lunges can work, but require more experience and tighter technique.

Avoid: heavy barbell compounds like squats, deadlifts, and bench press at near-max loads. The systemic fatigue and technical demands make short rest periods risky. Form breakdown on a lateral raise is an inconvenience. Form breakdown on a squat under load is a problem.

Common Mistakes

Activation set too heavy. If you can only get 8 to 10 reps, the load is too heavy. You need 12 to 20 reps on the activation set for myo-reps to work as intended.

Resting too long. If you’re taking 30+ seconds between mini-sets, you’re just doing traditional sets with short rest. The 10 to 20 second window is what maintains the fatigue state that makes the method work.

Not stopping when reps drop. The most common and most counterproductive mistake. Those extra grinding mini-sets after your reps have already fallen off add more fatigue than stimulus.

Using myo-reps on everything. One or two exercises per session is plenty for most people. Three at the most. Your main lifts should still use traditional sets with full rest periods. Myo-reps are for accessories and isolation work.

How to Program Myo-Reps

If you’re new to the method, start with one isolation exercise at the end of your session. Pick something simple like lateral raises or curls. Do one full myo-rep sequence and see how it feels. Most people are surprised by how challenging it is despite using lighter loads.

Once you’re comfortable, you can use myo-reps on 2 to 3 exercises per session. A practical setup for most training days: primary lifts done with traditional sets and full rest, secondary work at moderate rep ranges, and isolation/accessory work using myo-reps.

A single myo-rep sequence roughly equates to 2 to 3 traditional sets in terms of stimulus. Keep that in mind when counting your weekly volume per muscle group.

Why Myo-Reps Work

Your nervous system recruits muscle fibers from smallest to largest based on demand (Henneman’s Size Principle). During the activation set, as fatigue builds and each rep gets harder, your body recruits more and more motor units to keep producing force. By the final reps, you’ve achieved very high levels of fiber recruitment.

With only 10 to 20 seconds of rest, those fibers don’t fully recover. So when you start your first mini-set, the muscle is still fatigued and your body has to keep those high-threshold motor units working from rep one. Every rep of every mini-set is performed under high recruitment. There are no easy reps.

With traditional sets and longer rest, you recover enough between sets that the first several reps of each new set are performed at lower recruitment levels. Those reps contribute to fatigue but provide a weaker growth stimulus. Myo-reps bypass that by maintaining the fatigue state rather than letting it reset.

You might see other sources say myo-reps work because of “metabolic stress” or “the pump.” That explanation is outdated. A 2025 review from McMaster University (Van Every, Phillips et al.) concluded that metabolic stress and cell swelling lack evidence for directly driving muscle growth. The driver is mechanical tension, the force your fibers produce against resistance. Myo-reps work because they keep high-threshold fibers under tension for more reps per unit of time.

Research supports this. Studies comparing rest-pause training to traditional multi-set training (Enes et al., 2021; Prestes et al., 2019) consistently find similar hypertrophy outcomes when volume and effort are comparable. Myo-reps aren’t more effective than traditional sets for muscle growth. They’re more time-efficient. That’s a meaningful distinction and a genuinely useful one.

Where Myo-Reps Fit in a Complete Program

Myo-reps solve a specific programming problem: how to accumulate enough hypertrophy volume on accessory work without making sessions excessively long. If your training week already includes heavy strength work and conditioning alongside your hypertrophy training, session time is a limited resource. Myo-reps let you stack efficient volume on top of your main work without turning a 50-minute session into 75 minutes.

They’re not a replacement for heavy compound work. They’re not superior to traditional sets. They’re a tool for getting quality accessory volume done faster, and within a well-rounded training program, that’s exactly where they earn their spot.

This is how we use them in our programming at Fitness Academy. Myo-reps show up on specific training days for isolation and accessory movements, sitting alongside heavier strength work and conditioning. One tool among several, doing exactly what it does best.