Think about the last time you walked down a steep flight of stairs. What were your thigh muscles doing? They weren’t actively pushing you forward; they were acting like a sophisticated braking system, controlling your …

Now Small Appliances
Now Small Appliances

Think about the last time you walked down a steep flight of stairs. What were your thigh muscles doing? They weren’t actively pushing you forward; they were acting like a sophisticated braking system, controlling your …