Big_Guns_Lance
Eat, lift, sleep, repeat.
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- Jun 18, 2007
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I'll state why flys are crappy.
They are a low loading exercise that places all the insertions and joints involved in the movement under unnecessary load which leads to injury. This is primarily because the recruitment patterns of the chest fly have a slight delay before the pec is in it's position of strength. So all of the bicep, deltoid, and pectorial insertions (that deep burn you get in the centre of your chest at the sternum is actually tendon trying to pull off the bone) are being compromised, the shoulder capsule itself is therefore under a lot of stress, all leading to structural problems.
Now that isn't to say that flys will kill you and rape your children, but given they are doing damage at such a low loading (thus little growth potential) you would question why you would do them at all. The only real place for them in a workout is as an activation exercise done at low loading. Most people do them post exercise where they probably have the least value other than as a pump exercise. Either way neither option should be anything other than a very occassional use.
Another point is that DB flys for chest are the worst offender. All the load is happening when it is doing the most damage, and none when you need the most loading. Do cable flys if at all.
Well for me, they work wonders. There one of my best exercises where i can solely target the chest muscles without recruiting any other muscles to help.
If it is true that the insertion points and joints are put under a lot of stress. Why aren't people getting injured from doing flyes. I use a lot of weight and i haven't had any problems? Not yet that is