The Perfect Pointe Book , by Lisa Howell, has many excellent foot strengthening exercises. Included with the book are video clips of students who demonstrate the exercises.
As you can guess by the title, it is geared towards dancers who are preparing to go on pointe for the first time. However, the exercises are great for any dancer or athlete. We don’t always think of strengthening the feet, but it is important.
All my younger dancers that are preparing for pointe work or who are already studying pointe do these strengthening exercises. I also incorporate them into my Balletone classes, which is a barefoot workout.
Do you exercise your feet?