There are two things I know to be true. One, I love a challenge. (Perhaps you remember my daily plank practice?) And two, I hate failing. When the opportunity to partake in a flexibility challenge ...

Gymnastics was part of my life for more than half of it. We know gymnasts are strong; I've written about bodyweight moves I still do to this day. We know they're flexible — case in point: Katelyn ...

To do the splits, you'll need to consistently stretch your hamstrings, hip flexors, and glutes. Stretches for the splits include the butterfly, piriformis, and kneeling hip flexor stretch. If you're ...

Lindsey Ellefson is Lifehacker’s Features Editor. She currently covers study and productivity hacks, as well as household and digital decluttering, and oversees the freelancers on the sex and ...