Step-up with Knee Raise progression

From easiest to hardest. Move to the next step when you can do the current one with good form.

1. Step-up with Knee Raise · Beginner · reps
   Facing a box, place one whole foot on it and stand up on that leg, driving the other knee up to hip height at the top; then step back down and alternate legs.
2. Dumbbell Step-up · Intermediate · reps
   Stand up straight while holding a dumbbell on each hand (palms facing the side of your legs).