From the early part of the 20th century to at least the 1930s, kids fastened their books and notebooks to a leather strap, perhaps adapted from a belt, and slung it over their shoulder.
Bootstrap – cont’d
As any golf caddy can tell you, carrying objects with a leather strap on your shoulder for prolonged periods cuts into the shoulders and can affect circulation and nerves. These types of straps can lead to tingling, numbness, and weakness in the arms and hands.
Duffel bags, gym bags
When students weren’t carrying their books in their arms, they put them in duffel bags, gym bags, squared leather bags, or satchels.
Duffel bags, gym bags – cont’d
Duffel bags and gym bags can carry many objects and some have shoulder straps, which can put stress on the shoulders and cause circulation problems.
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