Answer:
The correct answer is - single-arm ball dumbbell chest press.
Explanation:
Alternating arm dumbbell chest press is the exercise that is the very next progression of the two arm dumbbell chest press exercise. The immediate progression to the alternating arm dumbbell chest press is a single-arm ball dumbbell.
In this type of exercise, one should lie on the back on the ball and press the dumbbells with one arm directly above his above sternum palms away from the body.
Thus, the correct answer is - single-arm ball dumbbell chest press.