Build strength, stability, and injury resistance with these essential single-leg moves. One of the first things to go for athletes as they age—aside from their hips—is their knees. Years of sprinting, ...

Test balance after 45. See the one-leg hold time that signals strength—and the simple progressions to improve fast.

They discovered a sharp drop off in ability after the age of 65, with many older participants struggling to hold the pose for more than two seconds. The authors wrote: ‘These findings suggest that the ...