Competing at the Tyson Invitational meet at the University of Arkansas, 24-year-old Hunter bettered two national marks in the space of 24 hours.

He got the ball rolling by clocking three minutes 53.49 seconds in the mile on Saturday (AEDT).

But the New South Welshman's back-up performance was even better.

Hunter won the 800m in 1:45.59 to strip more than a second off the Australian and Oceania records previously held by Joseph Deng.

At the New Balance grand prix in New York on Sunday (AEDT), Hoare powered home to smash Stewart McSweyn's national and Oceania records in the 1500m with a winning time of 3:32.95.

The high-class field left in his wake included runner-up Jake Wightman from Britain and New Zealand star Nick Willis, who was back in eighth place.

"I love running indoors, even though I'm an Australian," said Hoare, 24, who moved to seventh on the world indoor alltime list.

"I just really wanted to run under that Olympic standard (3:35.00) today."

Not to be outdone, McDonald clocked the fastest indoor two-mile time by an Australian with 8:14.92.

It was further proof of the impressive depth in Australia's male middle-distance running stocks less than six months out from the rescheduled Tokyo Olympics.

Back on home soil, Kelsey-Lee Barber made a successful return to action in her first meet since claiming world championships javelin gold in Doha 500 days ago.

Barber's winning throw was 55.93m as she eased back into competitive action at the ACT championships.

Also in Canberra, Rohan Browning clocked 10.23 to comfortably see off the challenge of rival Jack Hale (10.44) in the men's 100m.

Liz Clay moved to second on the Australian 100m hurdles alltime list behind the great Sally Pearson with a sizzling run of 12.72.

Commonwealth Games silver medallist Brooke Stratton won the long jump with 6.72m, her best effort in almost two years.

Australian Associated Press