Get into a half-kneeling position on the mat, one foot forward and both knees bent 90 degrees. Hold a kettlebell by the ...

The starburst side plank variation strengthens the shoulders, abs and obliques. Here's why we love it at Tom's Guide.

"Instead of lifting a dumbbell, focus on drawing your elbow up towards your ribs and squeezing your shoulder blade in.

Start on your hands and knees with a pair of moderately heavy hexagonal dumbbells on the floor underneath your shoulders. Hold the dumbbells and step your legs back into a high-plank position, so your ...