While keeping the upper body tight, jump the feet outward as if you were doing a normal jumping jack. For a modified plank jack. This variation can be done from modified plank positions. 2) Plank jacks. Start in the traditional plank position with your feet about hip distance apart. Plank position can put stress on the wrists. Plank jacks should be avoided or modified if you have a wrist injury or wrist pain. To modify, you can perform them. · Plank position can put stress on the wrists. Plank jacks should be avoided or modified if you have a wrist injury or wrist pain. To modify, you can perform them on your forearms bltadwin.ruted Reading Time: 6 mins. · bltadwin.ru To Do A Modified Plank JackThe Plank Jack is great way to condition the body while building core and hip stability. This. Plank jacks can be modified for lower impact if you prefer a more core-focused workout, or harder for an intensified workout. “Reduce the intensity by simply stepping it out rather than jumping, moving one leg out and in, and then alternating with the other side,” explains Lai.
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