Biohacker Devices: Fitness Ring Lots of my companions keep track of the appearance of novelty gadgets for advanced biohackers. No longer a novelty, but a handy thing nonetheless. Such a ring is essentially a compact version of fitness bracelets. They track:
heart muscle contraction rate;
the intensity of physical activity;
the number of steps walked;
the number of calories burned.
As far as I'm concerned, bracelets are just as great. Yet for those who value compactness and convenience, these are the best option.
