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)-.
When you play volleyball, you flex the muscles of your ankles, which are your calves and more formally known as the gastrocnemius, soleus and plantaris muscles. The ankle joint and the calves make it possible for you to push yourself off the ground and jump.nees. Along with your hips and ankles, the knees make it possible to complete a jump during a volleyball match. Four muscles collectively known as the quadriceps -- the rectus femoris, vastus intermedius, vastus lateralis and vastus medialis â support the knee action and allow you to straighten your legs.