You don’t need sit-ups to strengthen your core — try these two moves instead

Sweat trainer Kelsey Wells performing a core exercise

Core stability work should be a key part of everyone's training plans, and not just because you want a sculpted six-pack. 

"A strong core is essential for having proper posture," Sweat fitness app trainer Kelsey Wells explains. "But the biggest benefit [of stability training] is strengthening all the muscles in your core, which will aid you in easier and better movement throughout your life."