If your home is subjected to leaves falling each year, you’ll have to rake them up, and probably more than once each season. And you’ll almost certainly know about the consequences of leaf-raking on the body, including strain and pain in the neck, the upper and lower back, and in the shoulders.
Just because you’re not chasing around a football pitch or playing a racquet sport doesn’t mean your body isn’t suffering the stresses of exercise. But whereas you might routinely warm up before sport or exercise, it may not occur to you to do the same before such activities as raking the leaves in your garden. Without a good warm-up, you run the risk of injury.