Not exact matches
These exercises require your glutes to
work hard
against gravity while moving through their full ranges of motion.
The weight due to
gravity stays the same over the whole of the rep,
while inertia
works against us
while we are accelerating the barbell in the first part of the concentric phase, and then helps us out (called momentum) in the later part.
If
working With, not
against gravity through the spinal roll — meaning an extra deep bend to the knee and deep push into the feet
while simultaneously engaging from the lower pelvic abdominal muscles through an exhalation — then it does become possible to easily and correctly set the natural curvature of the spine, without risk of anterior disk compression through a spinal roll.