Topping it off: The strain on the neck simulating what it feels like to hit the brakes while racing at speeds ... training and reaction-time exercises of Formula 1 drivers. Seven-time NASCAR ...

Jimmie Johnson is embarrassed to admit that not only does he own a grip-strength device, he uses it nonstop. “I carry it with me and try to burn out my forearms daily,” he says. “I never ...

Topping it off: The strain on the neck simulating what it feels like to hit the brakes while racing at speeds ... training and reaction-time exercises of Formula 1 drivers. Seven-time NASCAR ...