I do a farmers walk variation. I walk on the balls of my feet, toes pointed forward, heels never touch the floor, as high off the ground as possible. I grab some db's and start walking a circle around the entire gym floor, it's probably about, 100 steps, maybe more. I do 2-3sets, if I can make the entire circle w/o failing, the weights go up.
Calves and forearms are very similar, they respond well to high volume. I also feel that the time spend on one leg during your step really helps train the local muscles, which also respond well to high volume training.
- It's important to keep your chest and eyes up, shoulders back on this exercise, also, make sure your knees aren't caving in, or bowing out.
-Your leg swing should be linear, watch yourself walk in the mirror, if your foot swings to the outside, or the inside, then you should focus on picking your knee up, and keeping your foot straight.
-This is a great "posture" exercise, as long as your are doing it right.