When creating a strength training programme, many personal trainers and fitness instructors have the plank in their sessions as a go-to core exercise. I'd do the same. It's a great full-body move that strengthens the core, improves posture, and builds stability.
However, it's a foundation exercise. Mark Harris, a level 4 PT and strength and conditioning coach, says: "It primarily focuses on the muscles through the centre of the body, particularly the rectus abdominis and the transverse abdominis. There are plenty of progression options available, including adding external weight while maintaining the same position."
