Wonder Core Blog

Woman doing a twisting crunch on an exercise mat, lifting her shoulders and turning her right shoulder toward her left knee to work her obliques

Twisting Crunches vs Twist Sit-Ups: How to Do Each and Which Works Your Obliques Better

Twisting crunches vs twist sit-ups: see what sets them apart, step-by-step form for each, which one trains your obliques better, the mistakes to avoid and how to make both moves...

Wonder Core Smart ab machine with a padded black seat, foam rollers and green dial knobs on a living room rug in front of a sofa

Wonder Core Smart Review: Does It Work? Features, Fit and Who It's For

Wonder Core Smart review: does it work? See how the dual spring-assist dials work, the 8 exercises it covers, size and fold specs, owner ratings and how it compares with...

Man leaning back into a twisting crunch on a green Wonder Core 2 ab machine on black foam floor mats, hands on the handles as he turns his torso to work his abs and obliques

Wonder Core 2 Review: Is It Worth It? Features, Workouts and Who It's For

Wonder Core 2 review: is it worth it? See what the spring-assisted crunch, twisting seat and 8 pulley resistance bands train, plus size and fit specs, accessories, owner ratings and...

Woman doing a heels-down Russian twist on a gray mat in a bright living room, leaning back with knees bent and hands clasped as she rotates her torso to work her obliques

Do Russian Twists Build Abs? Muscles Worked, Form & 4 Variations

Yes, Russian twists build abs. Learn which muscles they work, how to do them with good form, the ACE stability-ball version, 4 Russian twist variations from easiest to hardest, and...

Woman standing in a bright living room with arms crossed over her chest, knees soft and hips facing forward, in the starting position for a standing side twist exercise

Standing Side Twists: How to Do Waist Twists Right (and What They Can't Do for Your Waist)

A side twist exercise turns your ribcage while your hips stay facing forward. Learn the 6-step form, 4 standing twist variations, how many to do, and what research says about...

Woman doing a kneeling rollout on a Wonder Core Slide Fit ab slide, with a close-up of the four-wheel ab roller board

What Is an Ab Slide? How to Use One, 8 Exercises & Ab Slide vs Ab Wheel

An ab slide is a wheeled core board you roll out from your knees. Learn the 5-step form, 8 ab slide exercises from beginner to advanced, how it compares with...