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Your core doesn’t need more crunches. It needs more control. Adding instability can make an exercise more demanding—but it doesn’t automatically mean your “deep core” is working harder or that the workout is better. The bigger takeaway: slow reps, controlled breathing, and resisting unwanted movement are what make core... show more
2 条评论

Friedrich6 天前
looks like the pelvis stays pretty much stable troughout all variations. interesting how these really specific targeted muscle have identified.. But you'll get hip flexors of stell for sure!

Lenin6 天前
Low impact
