Joe DeFranco briefly tackles an interesting question – bands and chains or air pressure?
His response (in part) :
The “consistent resistance” that these machines market as a positive feature is actually detrimental to athletes. I say this because I want my athletes to always try and ACCELERATE the barbell when they lift. The act of actually making the barbell move faster is what helps develop explosive force. The “air pressure” machines provide a CONSTANT bar speed, regardless of how much force an athletes applies when performing the lift. In my opinion, this may actually decrease an athlete’s explosive force!
Somehow I can’t help thinking ‘Nautilus‘ when I read this. I do tend to agree with him though.