Combo exercises allow you to work 2 parts of the body at the same time.This is an excellent method of intensification to increase the difficulty of your training sessions and to progress faster.
In this workout, I have selected 4 exercises that allow you to work both the abs and the arms.
Also try my workout with the bands dedicated to the abdominals and the workout for toned arms and shoulders with weights.
To learn more: Exercises for firm triceps + Cross climber: 4x10 repetitions