Can you explain what you mean by this ?
I'll try.
You will notice a difference doing 20 rep's.
It's about load, with the barbell the load is continually challenging the lumber curve.
The trap-bar is a tad different with the positioning of the grip, as in the load is directly in-line with the thigh and hip, changing the emphasis slightly.
The squat, the dead-lift and trap-bar lifts are three very demanding lifts.
But the dead-lift is a lift is an exercise that demands a lot of lower back strength.
If I'm asked to differentiate the three major exercises?
The squat, back and chest with an emphasis on the hip and thigh
The dead-lift,upper back, hip and thigh with an emphasis on lower back
Trap-bar, shoulder girdle, hip and back with an emphasis on thigh
I love all three.
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