Australia's fastest man Rohan Browning has made his first appearance at this year's national athletics championships, but as he eased into competition the next generation of sprinting talent took centre stage.

Browning qualified for Saturday's semi-finals third fastest, winning his heat but largely cruising to a time of 10.43.

It was a steady start for a man who harbours aspirations of breaking the 10-second barrier, and who is spending his year tuning up for an assault on Paris.

"I've been carrying a little knee niggle and I haven't been able to do any accelerations for the last three weeks," Browning said.

"I feel like I'm probably a week away from being fully, fully fit. But the Championships are this week, so I have to turn up.

"I think my top end's really good, but I've got to be able to set the race up."

Just weeks after breaking the women's national 100m record, Torrie Lewis opted against running in the event at the national championships, choosing to focus on the 200m while staying sharp for an upcoming relay camp.

But if there was a vacuum left in Adelaide by Browning's steady start and Lewis's deference, rising star Gout Gout was all too happy to fill it.

Over the first two days of the national championships, nobody has caused a bigger stir than Gout.

Undaunted by the weight of expectation and his youth even in an underage field — "I don't think I've heard of any 16-year-old being an under 20 champion," he says — Gout overcame a sluggish start to charge home to 100m victory on Thursday.

On Friday Gout cruised through his 200m heat, barely escaping second gear as he qualified for Saturday's final with ease.