Certain scents and sounds attend the arrival of summer. The smell of fresh-cut grass, cicadas chirping and the thunk of cricket bat on ball. But there's also a lesser known sound: the crunch and grind of shoes striking turf. The arrival of sun shocks thousands of Victorians into a flurry of activity each year. Everyone thinks the same thing: 'I must get fit'. To this end seasoned athletes and weekend warriors are taking to the streets in droves.