Crunch
Crunch is a classic core exercise that explicitly trains your abdominal muscles - part of your core. It also includes your oblique muscles on the sides of your trunk and the muscles in your pelvis, lower back, and hips.
Cross-Body Mountain Climber target many major muscle groups, including the abs, lower back, hamstrings, and glutes. It is a calorie-burning workout that really gets your heart rate going. This workout also targets your core, making it the perfect exercise to lose that stubborn belly fat and reveal your abs.
Crunch is a classic core exercise that explicitly trains your abdominal muscles - part of your core. It also includes your oblique muscles on the sides of your trunk and the muscles in your pelvis, lower back, and hips.
Side Plank works your obliques, the muscles that run along the side of your core. Keeping your obliques strong can make rotating and bending your trunk easier.