Focus: Core The plank exercise is a classic among isometric exercises, known for its ability to stabilise the core, improve posture and aid overall balance. The side plank works the abdomen, chest and ...

Narrator: This is Edna Bumcrank. She’s rather old. But of course she hasn’t always been like this. I wouldn’t do that if I was you burglar because… When she was younger, Edna used to be a ninja. Let’s ...