4-MOVE AB WORKOUT TARGETS CORE MUSCLES

Sit-ups can be uncomfortable and require equipment or a gym membership

There are alternatives to sit-ups that work the same muscles

This four-move workout targets your deepest core muscles

The first move is the plank, which works the entire core

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The second move is the bird dog, which targets the lower back and abs

The third move is the side plank, which works the obliques

The fourth move is the dead bug, which targets the transverse abdominis

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