How to Choose the Right Weight in Class
Updated: 23 hours ago
My first year of CrossFit, I loaded the bar for a short thruster sprint to match the athlete next to me. It felt fine in the warm-up. By round two I was doing singles, staring at the barbell between reps, while everyone around me was finishing. I technically completed the workout. I just didn't do the workout the coach had written.
That day taught me the rule I now give every new athlete: the right weight is the one that lets you get the workout the coach actually wrote. Not the heaviest weight you can survive. Not the prescribed weight because it's prescribed. The weight that delivers the intended stimulus.
It sounds simple, but in a busy class it's one of the hardest decisions to make well. You have about two minutes between the warm-up and "3, 2, 1, go," the athlete next to you just loaded the Rx weight, and your ego has opinions. So people guess, and the guess is usually too heavy. The right load teaches. It teaches you good positions, the right pace and what the workout was designed to feel like. Here's the decision guide I use, and that I want you to be able to run in your head in under a minute.
IN THIS ARTICLE
Start with the question most athletes skip
Before you touch the bar, ask what the workout is supposed to feel like. A good coach will tell you in the class brief; if not, ask. A six-minute sprint with thrusters and burpees is meant to be fast and breathy, with the barbell moving in big, quick sets. A heavy EMOM is meant to be about strength and position under a challenging load. A 25-minute chipper is about sustainable pace.
The same barbell weight can be perfect for one of those and completely wrong for another. That's why I never answer "What weight should I use?" without first asking, "What's the workout for?" Half the time, the athlete asking hasn't thought about it yet, and you can see the answer change on their face once they do.
The decision guide
Once you know the intent, run through these questions in order. If the answer to any of them is no, go lighter.
Can I do the first set unbroken, or in the sets the coach intends? For short, fast workouts, the first round should feel almost easy.
Can I hold good positions for every rep? If the warm-up sets at this weight already look ugly, it won't improve under fatigue.
Can I finish within the intended time or rounds? If the coach expects 8 to 12 minutes and your weight puts you at 20, it's a different workout.
Will my rest periods stay short? Long stares at the bar mean the load has taken over the workout.
How am I today? Poor sleep, a hard day yesterday or a sore back all lower the right weight.
Is this movement a strength of mine or a weakness? Go more conservative on the movements where your technique breaks down first.
If you pass all six, you've probably found the right weight. If you're unsure between two weights, choose the lighter one. I've watched far more workouts ruined by a load that was too heavy than by one that was a little too light.
Coach's cue: Choose the weight that lets you do the workout, not the weight that does the workout to you.
What the right weight feels like, by workout type
For short sprints under about seven minutes, the barbell should feel light enough that you could hold your first set's pace for at least the first half. In those workouts, most athletes should be moving the bar in large sets or unbroken, and the lungs and legs should be the limiter, not the load.
For medium workouts in the 8 to 15 minute range, the right weight lets you do consistent, planned sets. Something like sets of 5 to 7 reps with short, predictable rests. If you're doing singles by round two, the weight was too heavy for this workout. Ask me how I know.
For long workouts over 15 minutes, lighter is almost always right. You need a load you can move steadily with good mechanics when you're deep in fatigue, and you should feel like you're managing the pace, not grinding every rep.
For heavy strength work and EMOMs, use effort ratings. A simple approach is reps in reserve: finishing a set knowing you could have done about one to three more good reps. Most working sets should end there, not at failure. When a percentage is prescribed, treat your 1RM as a guide and adjust up or down by how the warm-up sets move today.
Adjusting when you got it wrong
Sometimes you'll guess wrong. That's fine; it still happens to me, and it happens to experienced athletes every day. The key is noticing early and making a decision rather than suffering in silence for 15 minutes.
If your first round is already slow and broken into singles, strip some weight off at the next opportunity, ideally within the first few minutes. Most coaches would rather you change the load and keep the intended stimulus than finish at the original weight with the wrong workout. I know I would. When one of my athletes quietly pulls a plate off mid-workout, that's not giving up. That's someone who understood the assignment. If your technique starts to fall apart, especially in movements like snatches, cleans or deadlifts, that isn't a sign of grit. It's a signal to lighten up. Sharp pain, rather than muscular effort, means stop and tell your coach.
On the other side, if a weight felt too easy, write that down in your log instead of adding plates mid-workout. Next time the same movement shows up in a similar workout, go up a little.
Your log is your best coach between classes
The fastest way to get better at choosing weights is to record them. After every workout, write down the load, how you broke up the sets and one sentence about how it felt compared to the intent. Within a couple of months, you'll have a personal reference library: the weight that works for fast thrusters, for medium cleans, for heavy EMOMs.
That record turns a stressful, two-minute guess into a quick, confident decision. It also shows you real progress over time, which is far more motivating than one heroic day at Rx. My own log is full of little notes like "too heavy, go lighter next time," and every one of them has saved me from repeating that first-year thruster mistake.
Train with intent, every session
Choosing the right weight is really about respecting the purpose of each session. When you get the intended stimulus, day after day, you improve faster and stay healthier. Respect the details. Keep showing up.
If you want every extra session to come with a clear intent and loading guidance, Sphere Programming gives you structured engine and gymnastics work alongside your classes, with a purpose behind every piece.
Your turn. Tried this? Tell me how it went in the comments below. I read every one, and your questions help shape what I write next. If it helped, tap the heart so it reaches more athletes.
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Further reading: National Strength and Conditioning Association (NSCA)
Coach Fritz Bautista · Head Coach, ATHLETESPHERE
CrossFit Level 2 Trainer (CF-L2) ✓ · CrossFit Programming Certificate · MBA · Digital Marketing Certified · Coaching athletes from all walks of life online
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