Grab one of the best adjustable dumbbells, and read on ... and support rotation and lateral movement — no Russian twists in sight. They also target your abdominals, lower back, hips and deep ...

Torch stubborn belly fat and sculpt a leaner core with this expert-approved dumbbell workout. Discover the top exercises to tighten and tone your midsection fast!

After the dumbbell circuit, Janine will take us through three rounds of Russian twists and butterfly crunches. Feeling wobbly? This strength session isn’t about moving fast so concentrate on ...