I'm not a technical type person but I dont think it is stressful on the bi's. It does butt up to your chest and you hands are in a different position.I definetly use much more tricep in the press.I am a bit of a rare case but i log press more than I do axle .My regular bar press is about 40 pounds higher than both.Mind you I am a presser not a jerker lol.
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