When it comes to workout moves, variation is a wonderful thing. Doing the same exercise every day ... plank with a knee tap?

To avoid all of that, we suggest stripping things back and trying a 30-minute no equipment full body strength-building ...

This side plank variation targets your upper and lower body while building core strength. Here's what happens when you do the exercise every day for a week.

Most people don't feel excited by the idea of holding a plank. Of all the workouts ... all day—I decided to take the advice I regularly read and write about and hold a one-minute plank every day for ...