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.

Hannah Fry opens up about how cancer changed her outlook on ageing, confidence – and why she wouldn’t undo it, even if she could. You want to strengthen your abs – so what should you do? Bicycle ...