Is DNA key to an ideal workout? Scientists say genes determine fitness and create test to identify if someone is suited to sprints or marathons

Is DNA key to an ideal workout Scientists say genes determine fitness and create test to identify if someone is suited to sprints or marathons By Fiona Macrae PUBLISHED: 00:29 GMT, 25 April 2013 | UPDATED: 06:47 GMT, 25 April 2013 If you gamely go to the gym or perpetually pound the pavements but don’t seem to be getting any fitter, the answer could lie in your genes. Scientists say DNA is key to sporting ability – and they have created a genetic test that tells someone if they are better-suited to marathons or to the 100 metres. Billed as ‘the end of workouts that don’t work’, the 249 kit reads around 20 genes involved in how the body reacts to exercise, the risk of injury and how long it takes muscles to recover from exertion