Editing Jumping jack (section)

===Split jacks===
The split jack is a variation on the jumping jack, similar to the [[split jump]]. It is performed by standing in a [[:wikt:stagger|staggered]] stance, while having the right foot in front of the left. Then the actual jumps are done while swinging an arm opposite the jumping foot, switching legs throughout the process.<ref>Campbell, Adam. The Men's Health Big Book of Exercises, Warmup Exercises, Chapter 12, Rodale, New York, 2009, page 353.</ref><ref>Campbell, Adam. The Women's Health Big Book of Exercises, Warmup Exercises, Chapter 12, Rodale, New York, 2009, page 353.</ref>