Start standing with dumbbells by your side and palms facing each other. Take a long step forward with the right leg. Drop the back knee down close to the ground. Your front leg should now be in a 90 degree angle to the ground with the front knee NOT extending beyond the toe. Hold the lunge position and then curl the dumbbells to shoulder height keeping the palms facing each other. Continue holding the lunge, then press the weights over the head while still keeping the palms facing each other. Return the dumbbells to the side, and push off the front leg returning to a standing position. Repeat with the other leg

Form:

Back knee does not touch the ground
Front knee does not cross over front toe
Keep bellybutton pulled back to the spine and eyes forward.

Variations:

Regressions- Lower weight, just do lunge, Just do curl and press

Progressions- Increase Weight, Stay in a lunge position