Ahead of the Cardiff Half Marathon, a double Olympic marathon runner has shared his tips on how people can improve their technique.

Steve Brace offered his advice ahead of the event on Sunday, October 6.

He said: "Being relaxed in your running action is the key to being a more efficient runner.

"Undue tension and poor technique can cause injury over a long period of time, no matter how good your shoes or how soft the running surface is."

He added: "Try running tall with your head up and a pronounced chest. Keep shoulders as low as possible and your elbows close to your side, swinging back and forth with no shoulder rise.

"Your rear leg should drive the pushing leg away so it’s important to keep the foot in contact with the ground as much as possible."

Running with your fingers open, rather than having a clenched fist, can also help to keep your upper body relaxed, Mr Brace said.

While it may feel unusual at first, making these adjustments can help people to become more efficient runners.

Mr Brace advised starting by trying to run with these changes over short distances as first – running 60m at 60-80 per cent effort.