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)-.
Jumping Jacks â I recently touted this awesome exercise in my new Change It Up column as a way to boost your fitness levels within your existing workout. The average person can burn up to 100 calories by performing Jumping Jacks for just 10 minutes. But donât expect to be able to work for 10 minutes nonstop.