Russian Twists are extremely high risk... The first issue is excessive compression. Staying in that half sit-up position requires a massive contraction of the abdominals and hip flexors, which in turn produces excessive compression of the lumbar spine. Secondly, twisting with a load side to side with your butt glued to the ground, is grinding your lower lumbar facets. It will seriously damage your discs over time and cause or exacerbate lower-back pain. . However by doing it with the INERTIA WAVE ®what we call the AB TWISTER (as seen in this video) you are fighting against the inertia of the tubes trying to pull you transversely... You’re automatically engaging the deep core muscle groups that you “think” your training with a Russian twist- without the stress and disproportionate force loads! BOOM!!!! #a#abworkouta#abs #p#personaltraineri#inertiawaveduoa#absworkout #c#coreworkout#c#corestrengtha#antirotation#i#inertiawavestrong #o#obliques#w#weightloss#t#tennisc#coreexercisesr#russiantwistp#planksi#inertiawavep#pallofpressa#antiextensionp#plankchallengehiit