You’ve probably already come across the 10,000 kettlebell swing challenge, the 100 swings-a-day challenge and even the ...

These stretches involve movement, which helps increase blood flow to muscles and prepare the body for physical activity.

Add Yahoo as a preferred source to see more of our stories on Google. Kettlebell swings work multiple muscles and are great for raising your heart rate. (Getty Creative) (Juanmonino via Getty Images) ...