5X5 programs -- what's the rationale?

NeoNewfie

New member
Hi all,

Let me start by saying that I'm not educated in physiology or kinesiology outside of what I glean from sites like this one, so I am grateful for all the knowledge people here can share with me. I've been struggling with a question of exercise methodology for a while now: why are squats, deadlifts, and bench presses considered so much superior to isolation movements for strength and hypertrophy?

The conventional wisdom for the last decade has been to stress big compound movements, especially the "big three," over more targeted exercises. I trained with mostly powerlifting movements throughout my 30s, but recently, at age 43, I decided to incorporate instead as many isolation movements as possible. I understand isolation movements as movements in which only one muscle contracts -- of course there are stabilizing muscles involved in any movement, even bicep curls, but this is different from a movement that involves multiple synergists. Now, it seems to me that focussing all your effort as much as possible on a single target muscle is the best way to grow that muscle, so that even if you can't lift as much performing, say, a cable pullover as you can with a deadlift or even a bent-over row, the relative lack of bicep, hamstring, and glute involvement in the former means you focus all of the effort directly on the target muscle.

Why, then, do most authorities argue hypertrophy occurs primarily with big compound lifts alone? Please remember I'm not looking for an argument, just clarification!
 
its a volume load/time management/ recovery volume issue. Compound movements offer the most bang for the buck sort to speak.

This of it this way, how much weight can you do in the compound lifts vs the isolation lifts? On how many muscles?

You can apply the most weight and get the greatest volume load with the least amount of time by using the typical big lifts.

Now, you can add sets and reps to your isolation movements to get to the same volume load as a compound movements but it will take considerable more time and will most likely be harder to recover from
 
Your question is really 2 questions; why 5x5 and, why compound movements. I'll give you my answer to the second question. It's strictly about poundage. Isolation movements limit the poundage you can move, whereas, in compound movements it's basically unlimited. This is because compound movement engage your whole body, so you can get stronger all over, and continue to advance with the weight. If you did only bicep curls, your arms would only get so big before you'd be limited by the "stabiliser muscles" as you call them. If you do rows instead, your arms can continue to grow, because all the surrounding structures also get stronger. Strength = size. To put this in real world terms, if you mess around with isolation movements forever, you might only lift 100 lb max. If you do squats and deadlifts, you might start around 200 lb, and move up 400, 500 or more. That's going to put some size on you.
 
I have read that the larger compound lifts which tax much more of your body in a much heavier way, are going to stimulate an increased release in your natural growth hormone. So my approach has been to hit a heavy compound movement, such as squats, and end the session with the smaller isolation movements to maximize the effects of increased hormone in the body during recovery/sleep.
 
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