Wonder Core Blog

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...

Smiling woman sitting on the floor beside the Wonder Core Pro Max in a bright home gym

Rowing Machine Proper Form & Common Mistakes (4-Mode Pro Max Guide)

Rowing machine proper form starts with your legs, then your back, then your arms — and the #1 beginner mistake reverses it. This Wonder Core Pro Max guide fixes the...

Man kneeling on a mat doing the forearm and biceps exercise on the Wonder Core Smart, gripping the foam rollers, one of the 8 moves in a first-month progression guide

Your First Month With the Wonder Core Smart: An 8-Exercise Progression Guide

New to the Wonder Core Smart? Here's how to use it in month one — the 8 built-in exercises, a 4-phase progression, and a sample 12-minute beginner session. Progress by...

Woman doing a controlled crunch on a Wonder Core Smart ab machine with hands behind her head, using proper form to feel it in her abs

Wonder Core Smart: Not Feeling It in Your Abs? Dial & Form Fixes That Actually Work

Wonder Core Smart not feeling it in your abs? It's almost always the assist dial set too high plus momentum. Lower the assist, slow the descent, use full range with...