Is this the future of cardio fitness assessment? | BBC Click

A VO2 max test is one of the best ways to measure your overall fitness. It may also be the best single measure for your life expectancy. Here's how new technology can work it out - in just three minutes. Subscribe here: http://bit.ly/1rbfUog For more news, analysis and features visit: www.bbc.com/news #WearableTech #VO2Max #BBCNews