Our core is made up of four muscle groups that are essential to everyday movements ... Try a core workout that includes three different ab exercises, like crunches, bicycle crunches and lower leg ...

Plank variations are also amazing for working out multiple core muscles at the same time. Begin with a simple plank by holding your body head-to-heel in a straight line, supported on forearms and toes ...

Here are five effective dynamic exercises that can help improve core stabilization. The plank with arm lift is a great ...

Insider's takeaway Both sit-ups and crunches can help you build a strong core. While sit-ups work various muscle groups, crunches isolate the ab muscles, making them a popular choice for people ...