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Real talk: The thought of doing jumping jacks may be only slightly more enticing than burpees. It may bring back memories of pre-dodgeball warm-ups back when dodgeball was part of gym class.
Schoolchildren in the US performing jumping jacks. A jumping jack, also known as a star jump and called a side-straddle hop in the US military, is a physical jumping exercise performed by jumping to a position with the legs spread wide and the hands going overhead, sometimes in a clap, and then returning to a position with the feet together and the arms at the sides.
Jumping jacks mix cardio and resistance work in one swift move (er, jump), while engaging multiple muscles, including the glutes, hamstrings, quads, and calves, as well as the muscles of the core ...
"Each phase of the sequence included a 2-min warm-up, followed by 5 min of jumping. The four heights, measured by the distance the subjects’ feet were elevated above the trampoline bed, were 18, 37, 75, and 100 cm. A 5- to 10-min rest period was provided between each jumping level." The jump heights in inches were: 7", 14.6", 29.5" and 39.4".
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The split jack, sometimes called as the split jumping jack, is a form of a warmup exercise and may be regarded as a variation of the traditional jumping jack. [ 1 ] [ 2 ] [ 3 ] It is similar to the split jump ; however, in the latter, the arms do not move and stay stationary at the sides of the torso .
Strength training can lower your biological age by 8 years, per new study. A trainer explains how to start. It may “limit disease and slow the aging of cells.”
A jumping jack toy, c.1850. The jumping jack is a jointed, flat wooden figure, a cross between a puppet and a paper doll that is considered a mechanical toy. The figure's joints are connected to a pull string that causes the arms and legs to move up and down when the string is pulled and released. Jumping jacks were popular in many contemporary ...