Increase stamina, lung capacity, and strengthen your cardiovascular system w/ the Powerlung® - http://www.bulletproofexec.com/powerlung
The Powerlung® is the original and only respiratory strength training machine with integrated exhale and inhale adjustable resistance for strength and conditioning. Breathing presents an unexpected opportunity for biohacking that can yield substantial improvements with relatively small effort. Presently, athletes and trainers use aerobic exercise as a way to increase breath capacity. Surprisingly, research shows that aerobic exercise does little to strengthen the 12 sets of muscles involved in respiration. A breakthrough in breath training, the Powerlung®, now raises the cardio bar. With an elegantly simple handheld unit that employs adjustable resistance, you can build the strength of the muscles involved in both inhaling and exhaling, resulting in increased breath capacity and better endurance.
Originally published by Bulletproof here
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