If you don't know how to train with a power meter, then it's little more than an expensive random number generator When you purchase through links on our site, we may earn an affiliate commission.

Power meters like the Kill-A-Watt are great for keeping track of energy usage, and are also very hackable. The Kill-a-Watt in particular puts out analog signals proportional to current and voltage, ...

Let’s assume, for the moment, that you want a device that measures your running power. Yes, there are reasonable questions and spirited debates that verge on the philosophical about what running power ...