The Reverse Tabletop or Half Upward Plank or Crab pose is an effective and low-impact exercise for core and arm strength, as well as overall body coordination. Its movements work the midsection and arm stability simultaneously. It is recommended for beginners to learn proper form and create increased muscle memory and is a useful tool for those striving to improve their posture. The exercise’s low-impact motions help to avoid injury and build joint strength, making it a great addition to both a strength-building and conditioning routine.