Device tracks your metabolism, detects if you're burning carbs or fat

Fitness-conscious consumers have their pick of the lot when it comes to devices that measure calorie intake and exercise output. But now a new device claims to take it further: it measures your metabolism, letting you know how fast you're burning calories.

Breezing, developed by scientists at Arizona State University in the UK, measures your metabolism by analyzing your rate of oxygen consumption and carbon dioxide production. To get a reading, breathe into the device, which gauges your resting energy expenditure (REE), or how quickly you're burning calories at rest. What's more, it tracks your respiratory quotient, letting you know whether you're burning up carbohydrates, fats, or a combination of the two. Dieters can then use this information to gauge whether or not they should be eating more, or eating less.

Data is transferred to your smartphone, where an app can analyze the data and provide exercise and diet programs tailored to the user and their fitness goals.

The company is currently raising funds via crowd funding platform Indiegogo. A pledge of US$250 can get the Breezing into your hands. Shipping is expected to begin in May.

While the company is promoting Breezing as the world's first portable indirection calorimeter, GizMag cites that there is another competitor: The BodyGem, which is geared toward fitness trainers to use with their clients.