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The bike helmet: A life saver with limitations

Friday, July 13, 2018 @ 11:21 AM | By Alyssa DeMarco and Ben Elkin

Bicycle helmets save lives. They protect the head and brain during bicycle crashes where the cyclist’s head strikes the ground, a vehicle, or some other roadside object. But bicycle helmets are not perfect: there are times when even a properly worn helmet does not prevent a head injury.

How do helmets work?

The main part of the helmet that protects the head during an impact is the energy absorbing foam. This Styrofoam-like material crushes and/or cracks during an impact (Figure 1), and this crushing and cracking...