Once again, 30-day fitness challenges are all the rage on social media. Whether it's a family workout challenge, a flat-abs-in-30-days challenge, or a popular 10-minutes-of-yoga-a-day-for-30-days ...

When you train your muscles (either by lifting weights, running, or doing resistance work), you create tiny microtears in your muscle fibers. While this might sound detrimental, it’s actually a good ...