**Why Almost Everyone Is Wasting Their Time In The Gym — Transcript & Summary | SozAI**
Source: https://sozai.app/transcript/why-almost-everyone-is-wasting-their-time-gym/

Jeremy Ethier's 10-week experiment with 200 lifters compares 6-day vs 3-day push-pull-legs splits to see which builds more muscle, finding similar growth.

## Key Takeaways

- Training 3 days per week with half the volume produced muscle growth statistically similar to training 6 days per week.
- Higher training frequency and volume may not translate into proportionally greater muscle gains, especially when sustainability and recovery are considered.
- Adherence and enjoyment matter: the lower-volume group found training easier to maintain and more motivating.
- Subjective confidence and perceived effort do not reliably indicate which program builds more muscle.

## What the video covers

- Jeremy Ethier challenges the assumption that more gym volume and frequency always produce more muscle growth.
- 200 lifters were randomly split into a 6-day-per-week push-pull-legs group (about 20 sets per muscle per week) and a 3-day group with half the volume.
- Both groups followed a small calorie surplus with a minimum protein target, tracked via an app, with non-compliant participants removed.
- Growth was measured weekly using circumference measurements of flexed and unflexed muscles, a method chosen to allow a larger sample size.
- The 3-day group consistently rated workouts as easier and more enjoyable, while the 6-day group found them much harder.
- The 6-day group was more confident its program maximized growth, and the 3-day group reported feeling stronger and lifting heavier in later weeks.
- Statistician Dr. Eric Trexler analyzed the data independently after 10 weeks.
- Both groups achieved statistically significant growth: 0.83 inches combined for the 6-day group versus 0.75 inches for the 3-day group.
- The difference was not statistically significant, meaning the two groups grew essentially the same amount.
- Trexler notes this contradicts prior research predicting about 60% more gains from doubling volume, prompting further investigation.

## Chapters

1. 00:00 Introduction: Is Your Gym Time Wasted?
2. 01:00 Experiment Design and Participants
3. 03:33 Participant Experiences in the Early Weeks
4. 08:00 Feedback on Difficulty and Confidence
5. 10:38 Late-Stage Trends and Member Perspectives
6. 13:00 Data Analysis Results
7. 15:00 Unexpected Findings and Next Steps

Answers

## Questions about this video

What was the main goal of the experiment?

The experiment tested whether training six days per week with about 20 sets per muscle produced more muscle growth than training three days per week with half the volume. The goal was to determine whether high frequency and volume were necessary for maximal results.

Which group grew more muscle?

The six-day group gained 0.83 inches combined on average, and the three-day group gained 0.75 inches. Statistically, the difference was not significant, so the two groups grew essentially the same amount.

How was muscle growth measured in the study?

Participants submitted weekly circumference measurements of their flexed and unflexed muscles. The researchers chose this method to enable a larger sample size instead of using high-tech body composition tools on a small group.

Why did the three-day group seem to enjoy training more?

The three-day group rated their workouts as easier and more enjoyable over time, and reported feeling energized and motivated. The six-day group found their program much harder, with more soreness and difficulty sustaining the schedule.

## Full Transcript — Download SRT & Markdown

00:00

Speaker A

What if half the time and effort you're spending in the gym isn't actually doing anything?

00:05

Speaker A

What?

00:17

Speaker A

I know. I know how that sounds, but I just ran an experiment on over 200 people, and what we found went against everything I thought I knew about training.

00:26

Speaker A

I'll break down exactly what we did, why most studies never catch this, and how many workouts you actually need to get the best results.

00:38

Speaker A

Ever since I got into lifting, I've always been someone who trains a lot, usually with six hard workouts a week.

00:50

Speaker A

Because according to the latest research, the more sets you do at the gym, the faster you grow.

01:11

Speaker A

But most of these studies have only tested high volumes on one or two muscles at a time, not your entire body.

01:24

Speaker A

So, was I actually getting more gains training six days per week, or could I have gotten just as good of results training with half of that?

01:29

Speaker A

To find out, I just need to run one of the biggest experiments of my life on 200 real people.

01:41

Speaker A

That's Drew.

01:46

Speaker A

He's one of 200 lifters we recruited as part of our 10-week experiment, where each lifter was randomly assigned into one of two groups.

02:00

Speaker A

The first group, which Drew fell into, is training six days per week using a push-pull-leg split.

02:13

Speaker A

Pretty much the exact same routine I followed for years, with around 20 sets per muscle per week.

02:24

Speaker A

Now, the second group is also doing a push-pull-leg split, but only three workouts per week.

02:37

Speaker A

So, same general program, same muscles worked, but half the workouts and half the number of sets.

02:45

Speaker A

Coming off of working out six days a week, this is kind of nothing.

02:55

Speaker A

Like me and most of the subjects we pulled, Matt is predicting that the group training twice as much should build the most muscle.

03:10

Speaker A

He's even worried if he'll be able to build any muscle at all in this plan.

03:15

Speaker A

I don't know. I hope I don't get fat.

03:22

Speaker A

Now, to control everyone's nutrition, every subject followed a small calorie surplus with a minimum daily protein target, and everything was tracked in our Built with Science app.

03:36

Speaker A

And so, if we noticed anyone wasn't consistent, we kicked them out of the experiment.

03:49

Speaker A

We also made sure both groups were balanced for gender and had an equal number of beginners and intermediates in each.

03:57

Speaker A

And as for how we're measuring muscle growth, each week, participants are submitting circumference measurements of their flexed and unflexed muscles.

04:03

Speaker A

And while you might think this isn't the most accurate way to assess growth, a lot of studies, including some of your videos, Jeremy, take a smaller group of people and do these really high-tech body composition measurements.

04:11

Speaker A

But obviously, you can only do that with small groups of people.

04:24

Speaker A

So, with this kind of design, what we do is sacrifice the high-tech body comp measurements so that we can expand out and get a more, you know, a larger, more representative sample.

04:33

Speaker A

That's Dr. Eric Trexler, a statistician and muscle growth researcher who helped us design this experiment in the first place.

04:41

Speaker A

After the 10 weeks are up, he'll independently crunch the numbers and tell us exactly what happened.

04:46

Speaker A

But so far, after just three weeks of training, the six-day-per-week group is struggling to keep up.

04:58

Speaker A

This week, I missed a few morning workouts.

05:09

Speaker A

Had to do them at night after leaving the office.

05:20

Speaker A

I started to dislike the six-day split a bit.

05:26

Speaker A

This is where we quickly started to notice a big difference between our two groups.

05:31

Speaker A

We actually asked all of our subjects to rate the difficulty of their program at the end of each week.

05:41

Speaker A

Going into the gym only three days a week, I am giving 110% rather than cutting corners here and there.

05:48

Speaker A

I'm totally digging the program so far.

05:54

Speaker A

I've done a six-day routine in the past, but this program gives me energy.

06:02

Speaker A

I wake up wanting to work out instead of dreading it.

06:16

Speaker A

And in the first four weeks, the three-workout group consistently rated their workouts as feeling easier and easier.

06:30

Speaker A

Whereas in our six-workout group, it's a lot.

06:37

Speaker A

It's definitely tough to hit six days of the week.

06:52

Speaker A

My muscles are still sore when I work out.

07:07

Speaker A

Probably tougher than I expected.

07:19

Speaker A

They ranked their workouts as much harder and never really got any easier.

07:35

Speaker A

But we also asked both groups to rank how much they thought their workouts were working.

07:44

Speaker A

I had a massage this week, and she said that she could tell my muscles were a lot stronger, a lot of definition, and like the V-shape.

07:58

Speaker A

I will say that my progress has been explosive.

08:12

Speaker A

If I look at week zero and now, there is a huge difference.

08:27

Speaker A

And while both the three- and six-day groups were confident their plans were working, the six-day group repeatedly seemed to believe their program was doing more to maximize growth.

08:39

Speaker A

And it seemed like that confidence was helping them push through even the most challenging of their workouts.

08:52

Speaker A

I feel nauseated, which causes vomiting after the leg exercise a couple of days ago.

08:58

Speaker A

Now I can relate to people who like to skip leg day.

09:10

Speaker A

Meanwhile, some members of our three-day group weren't sure if they were seeing results at all.

09:23

Speaker A

My belly's growing.

09:35

Speaker A

The rest of me is kind of staying the same.

09:40

Speaker A

I do not feel any stronger nor fitter.

09:53

Speaker A

So, at this point, I would say our six-workout group not only had over a decade's worth of research predicting they would win, but they also seem to have a clear advantage in confidence as well.

10:06

Speaker A

Been telling myself to stop whining and wake up when the alarm is on.

10:19

Speaker A

I'm enjoying the result of my discipline, which means enjoying the program as well.

10:26

Speaker A

Hearing him say this made me feel pretty optimistic that he was using the best plan.

10:38

Speaker A

That is, until the last few weeks of the experiment, where there was one trend I kept noticing from our three-workout group.

10:51

Speaker A

I feel way stronger than I did last week.

11:03

Speaker A

I'm starting to feel like I'm in my 30s again.

11:12

Speaker A

Our three-workout group kept making videos about feeling stronger and lifting heavier than they did the week before.

11:22

Speaker A

I think maybe I did push myself harder because I only had three days.

11:26

Speaker A

I'm like, we've got to make these count.

11:29

Speaker A

We've got to go hard.

11:41

Speaker A

We only have three days.

11:54

Speaker A

Meanwhile, members of our six-workout group were talking about the training plan as if they were just trying to survive.

12:06

Speaker A

Am I enjoying the program so far?

12:18

Speaker A

No, I'm not.

12:35

Speaker A

I don't know that I would recommend anybody follow this kind of program.

12:48

Speaker A

Maybe if I were half my age, it wouldn't be such a big deal.

13:03

Speaker A

But feelings don't necessarily tell you which program actually builds more muscle.

13:07

Speaker A

So, after 10 weeks, we collected all of the data, sent it to Dr. Eric Trexler, and let the numbers decide.

13:16

Speaker A

Whenever I analyze data, the first thing I do is just visualize the data.

13:25

Speaker A

I try to get an understanding of the data characteristics and the distributions.

13:36

Speaker A

You're basically trying to make sure that your data collection process yielded data that are high-quality and realistic.

13:50

Speaker A

And looking at the data from this experiment, that was definitely the case.

14:05

Speaker A

The analysis revealed that all of the groups in this experiment did, on average, achieve statistically significant growth.

14:18

Speaker A

Now, the million-dollar question is: which group grew the most?

14:28

Speaker A

Combined growth in the six-day program was 0.83 inches on average, whereas the three-day-a-week push-pull-legs led to a combined growth of 0.75 inches.

14:41

Speaker A

Now, you might say, you know, that looks like a meaningful difference, but it's important to understand that that was not nearly a significant difference between the two, and any statistician would look at these data and say those two groups essentially grew the same amount.

14:53

Speaker A

So, despite our three-day group doing half the training, statistically they grew pretty much the same as the six-day group.

15:04

Speaker A

Now, my first assumption is that we accidentally screwed something up.

15:15

Speaker A

The strongest available research out there suggests that if you go from 10 sets per muscle per week to double that, you should get about 60% more gains.

15:27

Speaker A

And when I run that calculation, that means the six-day-per-week group should have seen a combined growth of 1.2 inches instead of just 0.83.

15:41

Speaker A

In my experience, most people who push to higher frequencies and higher volumes, they end up sacrificing othe

15:52

Speaker A

Hello. Oh, hi. What's up, man? Good to see you. How did you like training six times a week? It seemed like you had quite a hard time.

16:01

Speaker A

Am I enjoying the program so far? No, I'm not. I feel nauseated. Quite frankly, I I would say that I hate it at that time.

16:10

Speaker A

Well, I do have some good news for you. I have another experiment. Oh, wow.

16:17

Speaker A

Yeah, sure. I'm in.

Topics: muscle growth training frequency push pull legs hypertrophy gym workout training volume science-based training resistance training muscle building experiment

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