Strength knows no gender, and this CrossFit video is proof. In this touching video, a male narrator explains how he grew up with a sister who not only inspired him but also demonstrated that women are just as tough — if not tougher — than men. One powerful line that stands out: "In thousands of chalk-filled gyms, women are challenging misconceptions of their own frailty." We couldn't agree more. Whether you are a CrossFit fanatic or not, this video will remind you just how tough you are. Despite what you may have heard about CrossFit, this video might even compel you to give it a shot.