Box jumps are particularly effective for this. How do you perform them? What are the risks? And how do beginners get started?

I recently wrote about how running with a can of Pringles helped me improve my form—an ingenious trick from my high school coach that taught me to keep my hands relaxed. The story got me thinking: ...

At first glance, springing onto a high box might not feel particularly relevant to running a long way on level group. But box ...