Leg crunches are beneficial for improving digestion and circulation due to the abdominal contraction and relaxation during the exercise.

Is It Safe to Do Sit-Ups or Crunches While Pregnant?

Yoga for Digestion: 7 Yoga Poses to Improve Digestive System

Are Abdominal Crunches Effective? » ForeverFitScience

5 Incredible Benefits of Leg Raises (Build an Amazing Six Pack

Symmetry, Free Full-Text

10 Best Lower Ab Exercises for a Strong, Supported Core

The 24 Best Stretching Exercises for Better Flexibility

How to Do Crunches Correctly — Plus 14 Variations

You Honestly Never Have to Do Crunches Again, According to Science

The Leg Raise: NOT An Ab Movement

The Best Pelvic Floor Exercises for Men

How to Plank Properly Every Time, According to Fitness Pros

15 Safe Abdominal Exercises during Pregnancy: Benefits & Safety Tips

5 Abdominal Workouts That Can Relieve Constipation Symptoms

The best ab exercises, according to science