These kinds of watches are designed to be well-used. They're resistant to water, sweat, and damage, including shocks and impacts. Like any electronic device, they aren't indestructible. But they're certainly designed with the way they'll be used in mind. In short, they're focused on strength and quality, so runners don't have to worry about harming them with normal use. They can keep up with the way serious runners will use them, and they'll last for a long time with reasonable care.