Grab a pair of dumbbells, some sandbags, some kettlebells or some Iron Suitcases like former New York Giant (and Dr. Ken trainee) Frank Ferarra above and go for a stroll. That’s all there is to “The Farmer’s Walk” exercise, and you would be hard pressed to find a better exercise for building grip strength and mental toughness. The Farmer’s Walk is one of Brooks Kubik’s favorite training methods – and for good reason.