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 ...

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 ...