DO YOU KNOW? That your ability to do physical work is related to the load you are moving and the speed with which it is moved?
AND DO YOU ACTUALLY CARE? YES!!
AND HERE’S WHY. You can get the most work out of your muscles if you are lifting a load that is considerably less than half your strength. So say, for example, you have a pile of dirt or snow to move. If you LIGHTEN your shovel load, you will be able to lift or move MORE in a given time period and the strain to your body will be less. And the same is true for groceries, boxes, laundry, building supplies…
This tidbit of information provided by DOUG CHRISTIE PHYSIOTHERAPY