The O2 Trainer makes it harder to inhale during use so it makes the lungs work harder. It also gets the wearer’s muscles accustomed to performing with less oxygen in the blood. This device really helps to condition the lungs and other muscles in the body.
O2 Trainer compactness and portability allow for wearing one during most fitness pursuits. Athletes can use this device while weightlifting, interval training, running, biking, rock climbing, or any other time you’re working up a sweat.
The O2 Trainer comes with a palm-sized mouthpiece with 10 different cups. Each cup offers different resistance. Beginners should start with the biggest cup (CUP 1). Start with that cup because it allows the most air to flow through.
You will definitely want to read the manual with this one. There are a few cups for rest periods including sleeping so you can train while resting.
This item makes our list for best gifts for athletes.
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