10 common mistakes beginners make on 5x5
Avoid the most common 5x5 beginner mistakes: starting too heavy, skipping workouts, not eating enough, and 7 more. Simple fixes for each one.
Every lifter who’s been at this for a while looks back at their first few months and cringes at something. Maybe they loaded up too much weight on day one. Maybe they skipped leg day. Maybe they spent more time on their phone than under the bar.
The good news: most beginner mistakes are fixable the moment you recognize them. And recognizing them before you make them is even better.
Here are the ten mistakes that trip up nearly every 5x5 beginner, and the simple fixes that keep you moving through the 5x5 progression system.
1. Starting too heavy
This is the big one. The mistake that ruins more early progress than all the others combined.
Your ego walks into the gym and says “I can definitely squat more than the empty bar.” And your ego is right - you probably can. But “can” and “should” are different things.
When you start too heavy, you skip weeks of technique practice at manageable weights. You stall sooner because you’ve shortened your runway for linear progression. And you increase your injury risk by handling loads your body hasn’t been prepared for.
The fix: Start with the recommended starting weights. For most lifts, that’s the empty 20kg bar. For barbell row, it’s 30kg. For deadlift, it’s 40kg. Yes, it feels ridiculously light. That’s the point. You’re building a foundation, and foundations aren’t impressive to look at until you see what gets built on top.
Those first weeks aren’t wasted. They’re an investment in the months ahead.
2. Adding too much weight per session
The program says add 2.5kg. Your gym’s smallest plates are 2.5kg per side, so you add 5kg total. That’s double the prescribed increase.
This seems like a small difference. But 5kg per session instead of 2.5kg means you’ll reach the same stall point in half the time. Over twelve weeks, you’ve added 60kg at the correct rate or hit a wall at the incorrect rate.
The fix: Buy 1.25kg microplates. They cost $15-30 online and they’re the single best investment for your training. Slip them onto the bar and add the correct 2.5kg total per session.
For deadlifts, 5kg per session is the standard increase. That’s 2.5kg per side with standard plates.
3. Skipping workouts
Life happens. You miss a Monday. Then the week feels off so you skip Wednesday too. Before you know it, you haven’t trained in ten days.
On 5x5, consistency isn’t just important - it’s the mechanism. The program works through accumulated sessions. Three workouts per week, every week, adding weight each time. Miss a session and you miss a chance to add 2.5kg. Miss a week and you’ve lost 7.5kg of potential progress.
The fix: Treat your three weekly sessions like non-negotiable appointments. Put them in your calendar. The 5x5 workout schedule is flexible enough to fit almost any lifestyle - Monday/Wednesday/Friday, Tuesday/Thursday/Saturday, or any three non-consecutive days.
Missed a day? Just do the workout you missed as your next session. Don’t try to double up or make up for lost time. Show up and do the work.
4. Not following the program
“I’m doing 5x5 but I added leg press, cable flyes, lateral raises, and three curl variations.”
That’s not 5x5. That’s a custom program loosely inspired by 5x5.
The program is three exercises per session, alternating between two workouts. That’s it. The temptation to add more is strong, especially when the early weights feel easy and you finish in 35 minutes. But the program is minimalist for a reason: it prioritizes recovery between sessions so you can add weight consistently.
Adding exercises consumes recovery capacity. Recovery you need for next session’s heavier squats.
The fix: Follow the program as written for at least three to four months before adding any accessories. If you finish your session and want more, go home. The program knows something you don’t yet: those 35-minute sessions become 75-minute wars soon enough.
5. Not eating enough
You can’t build a bigger, stronger body from nothing. Muscle tissue requires raw materials: protein for repair and growth, carbohydrates for energy, and enough total calories to fuel recovery.
Many beginners, especially those who want to lose weight simultaneously, eat too little to support strength gains. They stall on the program and blame the exercises when the real bottleneck is in the kitchen.
The fix: Eat at least 1.6 grams of protein per kilogram of bodyweight daily. For an 80kg person, that’s about 130g of protein. Eat enough total calories to fuel your training - this doesn’t mean overeating, but it means not starving yourself.
If the scale isn’t moving and your lifts are stalling, you’re probably undereating. Increase calories by 200-300 per day and see what happens. For more detail, our nutrition guide for 5x5 covers this thoroughly.
6. Not sleeping enough
Sleep is when your body repairs muscle damage, consolidates motor learning, and produces the hormones that drive strength adaptation. Cutting sleep from 8 hours to 6 doesn’t just make you tired - it directly impairs your ability to get stronger.
Research consistently shows that sleep deprivation reduces testosterone, increases cortisol, impairs recovery, and decreases performance. You might be doing everything else right and still stalling because you’re sleeping five hours a night.
The fix: Aim for 7-9 hours of sleep per night. Not 7-9 hours in bed scrolling your phone - actual sleep. If you’re training hard three times per week, your body needs the recovery time. For a deeper dive, read about sleep and recovery for strength gains.
This is the least glamorous advice in strength training, and it’s one of the most important.
7. Not warming up properly
You walk in, load your working weight onto the bar, and start squatting. Your joints are cold, your muscles are tight, and your nervous system isn’t ready for heavy loading.
Skipping warm-up sets is an injury risk and a performance limiter. Warm-up sets prepare your joints, increase blood flow to working muscles, and practice the movement pattern at lighter loads before you go heavy.
The fix: Do proper warm-up sets before every exercise. A typical warm-up for a 100kg squat:
- Empty bar (20kg) x 10 reps
- 50kg x 5 reps
- 70kg x 3 reps
- 85kg x 2 reps
- 100kg x 5x5 (work sets)
This takes 5-8 minutes per exercise. It’s time well spent. Your working sets will feel better, your form will be tighter, and your joints will thank you.
8. Half-repping squats
You descend two-thirds of the way, your quads burn, and you stand back up. You tell yourself that was deep enough. It wasn’t.
A proper squat requires your hip crease to descend below the top of your kneecap. Anything above that is a partial rep, and partial reps train a partial range of motion. Your strength development is incomplete, your legs develop unevenly, and you’re building habits that will be hard to break later.
The most common excuse: “my knees hurt when I go that deep.” For most people, knee discomfort during squats comes from poor form (knees caving inward, heels rising) rather than depth itself. Fixing form fixes the pain. Our squat guide for beginners covers proper depth in detail.
The fix: Film yourself from the side. Check your depth on every set. If you can’t hit proper depth with your current weight, reduce the weight until you can. A full-depth squat with 60kg is more valuable than a half-squat with 100kg.
If you’re unsure about your depth, it’s probably not deep enough. When in doubt, squat deeper.
9. Changing programs too soon
Week three. The weight feels light. Your friend is doing a push/pull/legs split and looks great. Maybe 5x5 isn’t the best program. Maybe you should switch to that YouTube routine with 47 exercises.
This is program hopping, and it’s epidemic among beginners. You never give any program enough time to work because you’re constantly chasing something better.
Here’s the truth: any well-designed beginner program will produce similar results if you follow it consistently for 4-6 months. 5x5, Starting Strength, and GSLP all work through the same mechanism - progressive overload on compound lifts. The differences are minor. The consistency of following one program is what matters.
The fix: Commit to 5x5 for at least four months before evaluating. Not four weeks. Four months. That’s roughly 48 workouts, enough to see real, measurable progress. If you’ve genuinely stalled on all lifts after four months of consistent training, proper eating, and adequate sleep, then it’s time to consider what’s next. Our guide on when to stop 5x5 covers that transition.
Until then, trust the process.
10. Not tracking workouts
“I think I squatted 72.5kg last time. Or was it 70kg? Maybe I should just do 75kg.”
Guessing your weights is like driving without a map. You might get somewhere, but you’re wasting time and probably going in circles.
5x5 is a numbers game. The entire program is built on adding a specific amount of weight each session. If you don’t know exactly what you lifted last time, you can’t add the right amount this time. You might repeat the same weight, skip ahead too fast, or use the wrong weight entirely.
The fix: Track every workout. Every exercise, every weight, every set, every rep. Write it in a notebook, type it into your phone, or use an app designed for it.
When you walk into the gym, you should know exactly what weight goes on the bar before you touch a plate. No guessing, no estimating, no “I think it was around…”
This is one of the simplest changes you can make and one of the most impactful. Tracking turns your training from random effort into a measurable system. You can see your progress in black and white, identify when you’re stalling, and make informed decisions about deloads and adjustments.
Everyone makes these mistakes
If you read this list and recognized yourself in half of them, you’re normal. Every experienced lifter has a story about the time they loaded too much weight on their first day, or the month they program-hopped through four routines, or the period where they slept five hours a night and wondered why they couldn’t add weight to the bar.
The difference between lifters who succeed long-term and those who quit isn’t avoiding mistakes. It’s recognizing them, fixing them, and getting back under the bar.
You don’t need to fix everything at once. Pick the biggest issue on your list - probably starting weight, consistency, or recovery - and address that first. The rest will follow.
The program is simple. The execution is what separates people who get strong from people who just go to the gym. For a comprehensive look at how progression, deloads, and plateaus work together, read the full progression guide.
Helping lifters get stronger with the simplest program that works. No BS, just barbells.