What’s VO2Max and what does it tell you about your fitness?

Standards is a series explaining various tech protocols, looking at their practical implementation, and where we could find them in devices around us. Fitness bands and watches have thrown around numbers at our faces and motivate us to be more healthy. All these smart wearables have two primary measures: the number of steps taken and the number of active calories burnt in a day. Apple pioneered the system to display three rings for calories, steps, and standing. It edges you to complete them out for the day to feel we’ve been active enough. Other smart band makers have also followed rings or a…

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