Those stiff, painful spots can take up to two weeks to go away on their own. Sophie Walster/iStock via Getty Images Plus Imagine you’ve just completed a tough upper-body workout. Your muscles feel a ...

Don't get us wrong--cardio exercises like running on a treadmill or cycling around your neighborhood has many health benefits. But it isn't the only form of exercise that can give your body a boost.

Picture this: You’ve finally committed to a strength training routine and you’re feeling strong. But now you’re deep in the numbers. Reps...sets...weight ...