There is also a special null type, the type of the expression null, which has no name. Because the null type has no name, it is impossible to declare a variable of the null type or to cast to the null type.
Transcript of Muscles Used for Jumping Jacks! Muscles Used for Jumping Jacks! FONTS. Muscles of the Abdomen- Anterior View. Rectus Abdominus. : Helps stabilize the movement to create pressure through a jumping jack. Muscles of the Lower Extremity. Anterior View (leg)-.
What Muscles Do Dumbbell Pullovers Work? A man is does a dumbbell pullover at the gym. Dumbbell pullovers are a bit of an exercise anomaly in that they work two opposing muscles simultaneously: the chest and the back muscles. The chest muscles are the primary movers, but several muscles of the back assist during the movement.