Researchers believe it is a that we must stretch before . Millions of around the world do this. It is a daily in many parks and . Researchers say there is no to show stretching improves running performance or decreases the of injuries. The research is in the 'British Journal of Sports Medicine'. There is evidence stretching can keep our joints , but it won't help performance or prevent .
A conducted the research after talking about stretching with joggers. He jogs and wonders about the of stretching. He said: "Runners have... around running injury risks... and that are in contrast to research evidence." He said runners follow ineffective to prevent injuries or increase performance. He said a 5-10-minute of walking or jogging was the best .