The reason why you’re not gaining the muscle you know you think you should is not because you’re “genetically cursed”. Instead, it’s more often than not due to a few key muscle building mistakes that you don’t even realize you’re making. Aside from the most obvious muscle gaining mistakes that you should definitely check off the list (e.g. getting enough protein, sleep, and calories), there are a few other lesser-known muscle building mistakes to avoid when it comes to how to gain muscle fast.

The first of the muscle building mistakes is that you just don’t have realistic expectations as to how quickly your muscles should be growing at. Research shows that on average, subjects are able to increase their muscle size by about 1 to 6% per month. Meaning that if you currently have 15 inch arms, then a realistic increase in arm circumference from 2-3 months of training would only be about half an inch, with untrained individuals likely able to gain slightly more. In terms of weight gain, this would translate to about 2lbs of muscle per month when you first start training, and will quickly dwindle down with experience. So, if you’re currently not experiencing noticeable gains week after week, just note that this doesn’t necessarily mean you’re doing anything wrong. You may just need to re-align your expectations.

As a follow up to the previous point on why you’re ‘not gaining muscle’, although progress will be slow, you need to ensure you are actually making progress. Along the way, you need to be diligently tracking key indicators that’ll help you determine if you’re truly building muscle. More specifically, track your daily morning bodyweight but most importantly track your strength and rep performance in your exercises. One additional helpful metric you may want to look at both your waist circumference and your muscle circumference measurements for your main muscle groups. To minimize error, you’ll want to have someone measure for you, be consistent with where you measure, take the average of multiple measurements, and measure every couple months or so.

One of the biggest muscle building mistakes to avoid is switching up your exercises too often. When a new exercise is initially introduced, it takes your body at least a few weeks to neurologically adapt to it and learn how to actually perform the movement most efficiently. Only after this initial learning, is when strength increases are then predominantly due to increases in muscle size. Meaning that if you switch your exercises too often, all you’re doing is essentially putting your body through this learning phase without giving it a chance to truly master the exercise and progress it to stimulate more muscle growth. So, instead, choose a decent variety of exercises for each muscle group and then keep them in your weight training routine for at least 4-8 weeks. After this point, exchange the exercise for a close variation of it only if either you’re plateauing on that exercise, it’s getting stale and demotivating for you to do, or it’s starting to cause aches and pains. Otherwise, keep it in and continue progressing it.

Maybe you haven’t been making any of the above muscle gaining mistakes. Even then, this last mistake can hinder your growth, and it’s neglecting the loaded stretch component of your training, which most often just comes down to failing to use a full range of motion particularly on key exercises where this matters the most. Because what’s interesting is that research supports the idea that applying tension to a stretched muscle seems to be an independent stimulator of muscle growth in addition to tension itself, and seems to provide a different type of growth in the muscle. So during your pressing movements like the dumbbell press or even push-ups, pay attention to the bottom position where your chest is fully stretched under load. Get as deep as you comfortably can and avoid simply bouncing out of this position.

So, as a recap, here’s a quick summary of how to build muscle fast, as outlined in this video. To build muscle, yes, you need to work hard but you also can’t overlook other important variables like tracking your progress, executing the right exercises in the right manner, properly fueling your body, and managing your recovery. And for an all-in-one system that shows you step by step how to optimize each one of these variables to transform your body as efficiently as possible just like its done for thousands of others, then take the analysis quiz to discover which science-based program would be best for you and where your body is currently at below:
https://builtwithscience.com/your-potential-realized/

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48 thoughts on “Why You’re Not Making Gains (4 HIDDEN Mistakes You Don’t Realize You’re Making)”
    1. @Johnny B 2 inches?!?! Have you been training only the right arm for the past year?

    2. Not enough sleep and until I quit I used to drink way too much alcohol. Since I quit I’ve had major gains in just 5 months.

  1. Jeremy I really want to thank you, your content helped me gain 20 pounds of mostly muscle over the last few months and I am forever thankful. Keep up the excellent work‼️

    1. Don’t wanna be that guy, but 20 lbs of muscle in a few months is physically impossible. It’s probably like 7 lbs of muscle maximum, the rest is fat/water.

  2. Easily the most admirable thing about your videos is that you truly do live up to following the science. I love the research and the studies that you CONSTANTLY use to back up you information. It’s inspiring honestly

    1. its great to know and hear logic behind something when you want to learn stuff. you will literally know for sure youre doing it right. hes one step ahead of all youtubers that dont do that instantly.

  3. The reason I’m not making gains is probably because I finish every workout eating crisps and ice cream…

    1. still doe, you are here watching fitness vids bc you are bothered with your situation, you can make gainz brother, just DO IT :D

    2. Yeah bro… ice cream is essential. You get your vitamins and protein from there. Haha

    1. I have 15″ but I have never really worked on my triceps I just barely started working on them like 1 week ago.
      I recon I should be 16 easy in no time since triceps are the biggest factor in this measurement.

  4. The reason why you’re not seeing gains is cause YOUR NOT TRAINING HARDER THAN LAST TIME

    1. @A S it’s not complicated. literally just count calories and protien, use progressive overload, and get enough sleep

    2. Exactly. Most people have no idea how to train properly and they wonder why they’re not making progress. “Oh it must be my genetics! Time to juice up to my gills cuz’ I’m simply genetically cursed!”

  5. 1. Have realistic expectations 2-3 months for 1 inch.
    2. Track progress, daily morning weight and strength
    3. Don’t switch exercise too often 2-3 weeks
    4. Not using full range of motion

    You are welcome.

    1. @Noctis for real! My first year of lifting I added inches to my arms(got up to 17 inch biceps)
      Since then going from 17 to 17.5 was ridiculous.

  6. Some of the common mistakes
    * Not eating properly ( nutrion sucks)
    * Following a shitty program ( Instead of focusing progressive overload )
    * Not sleeping enough ( not recovering )

  7. Hidden mistake: gym closed since november because of covid and I absolutely hate most of the home and bodyweight workouts

  8. 1. Consistency, don’t expect immediate results
    2. Track your progress
    3. Avoid switching exercises too often (stick to the same at least 1 loading phase 4-8weeks)
    4 .Exercised loaded stretched muscle groups (use weight, aim for near max extension of muscle under load)

    1. The picture might be with a very good pump and great lighting…. still, he looks too good after his cut

  9. Measuring is important. Looking at yourself every day naturally makes it harder to see the gains

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