I know that in the vast majority of cases (if not almost all) freeweights are superior to machines.
However what got me thinking was the Peck deck machine: it keeps the tension on your pecs equal throughout the whole range of motion while as if you were to do dumbbell flies, then the tension would decrease substantially when the dumbbells are raised over you.
I was wondering perhaps this is one place where a machine can be considered a bit better than freeweights due to the constant pressure? Or is that constant pressure not important for proper muscle development and having maximum pressure at only one part of your range of motion will suffice?
Any thoughts on this?
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05-12-2009, 02:30 PM #1
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Peck deck machine vs dumbbell flies
Last edited by matjusm; 05-12-2009 at 02:40 PM.
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05-12-2009, 02:34 PM #2
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I likedoing 1-arm flies on the pec deck fly because you can go past the center of your chest for a much stronger contraction than you can get with dumbbells. Really burns the inner pec line, good for bringing out detail there.
I like using dumbbell flies best for the stretch you get at the end of the negative stroke. Nothing beats that for bringing out the outer edges of the pecs.
So, I like using them both for different purposes.Last edited by hulkinout; 05-12-2009 at 02:36 PM.
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05-12-2009, 02:37 PM #3
Well ya got it backwards on the flys, tension decreases as the weight comes up. The problem on peck deck is the weird angle it puts your arms at, something to do with the shoulder angle and no support can cause injuries. I clearly dont know the technical details so maybe someone else can chime in.
You may be better of with cable flys if you want the constant tension.
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05-12-2009, 02:40 PM #4
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do both and add in cable flys at various angles.
My gym has 4 different pec decks + 3 cable stations. That in addition to DB's will hit it from every angle.oh and gecko that link did not contain answers only the search page - swiftness_02
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05-12-2009, 04:28 PM #5
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05-12-2009, 04:51 PM #6
I like the feeling and burn you get when using the pec dec with some plates on top of the stack. However, if you use proper technique, the DB incline fly is a sensational move and give me a better upper chest workout than the incline bench.
Cables are great too. I do the low pulley chest flies on these. Excellent exercise if you want to switch from incline DB flies.
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05-12-2009, 05:23 PM #7
cable flys>pec deck
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05-12-2009, 06:40 PM #9
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05-12-2009, 06:55 PM #10
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I switch it up...but i like the pec dec alot. You can get the same stretch as you get when using DBs...but it also allows you to get maximum contraction when squeezing and lifting the weight. When using DBs most of the tension on your chest is at the bottom of the movement...you don't get that much contraction at the top/end of the motion. I get a better squeeze with the pec dec.
As Hulk said...doing one arm at a time gives an even better contraction b/c you can go further across your chest than when doing two arms together
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05-12-2009, 07:18 PM #11
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Pec decs are inferior to cable flyes. You are not working with the same range of movement and a pec dec is not customizable to its user. With cable flyes you can get much better concentration as long as you are using perfect form.
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05-12-2009, 08:11 PM #12
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05-12-2009, 08:16 PM #13
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05-12-2009, 09:45 PM #14
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I think a lot of people use pec dec because it is more user friendly to the novice.
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05-13-2009, 11:03 AM #15
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People...at least me...use the pec dec because it's more of a controlled motion and you can focus more on the contraction of the muscle. Yes cables give you more range of motion in the you are able to move outside a linear path of motion...but that also means you have to focus more on ensuring you are keeping perfect form and control...and that may take away from concentrating soley on the squeeze/contraction at the top of the movement.
Neither is superior to the other...it all depends what works better for you
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05-13-2009, 11:17 AM #16
I like them all. Personally I just keep switching it up to keep the variation high in my workouts. Do pec deck one week, do cable flyes the next, then do dumbbell flyes the following week. Or do more than one of those in a chest day. It's all about what your routine looks like and what you are trying to do with it. Each of these exercises has its benefits but ultimately they all work out your chest well.
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05-14-2009, 09:04 PM #17
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03-06-2018, 03:30 PM #18
To Deck those Pecks or or not to Deck
I think it is important not to say one or the other. Both lifts have their uses. For building shear mass Flat Bench, Incline Bench, and Flyes are key. That does not preclude using the Peck Deck to hit the muscle tissue using that constant weight resistance. I think in the end it is what works best for you. Many newer trainers will speak ill of Flyes calling them dangerous. Any lift is dangers if done with poor form and can end up tearing muscle and tendons. Flyes allow for a wider range of motion and allow the lifter to adjust the tension through the lift. The Peck Deck takes much of that control away. For some that is the best option. In the end you will have to find what works best for you. What causes more growth? Just using Flyes? Using Peck Deck, or using both?
Matt
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