Sit-ups can be a great way to strengthen your abdominal muscles that sit around your stomach. But they can quickly get repetitive and its easy to accidentally lose your form, so when boredom strikes, ...

You don't need to do thousands of sit-ups or spend hours in the gym to build abs. You can instead do the bare minimum of two to three ab-focused exercises for 20 to 30 minutes a week. Exercises like ...

If you want strong and toned abs, you're going to have to work those muscles from all angles. Basic crunches won't do. Here's a five-move workout that fires up your core, carves your waist, and ...

I'm not a huge fan of crunches. The move is easy to perform incorrectly and doing so puts a lot of strain on the neck. Another reason I don't love them is that if you're short on time, they aren't the ...

Add Yahoo as a preferred source to see more of our stories on Google. Common core-based exercises (like crunches, planks, and mountain climbers) are a natural fit for your yoga mat. You wouldn’t use ...

For core workouts from Stephanie Mansour — plus fitness challenges, walking podcasts, meal plans and inspiration — download the Start TODAY app! When it comes to toning the abdominals, many of my ...