Johannesburg – Sprinter Dyan Buis continued his superb form at the Nedbank National Championships for the Physically Disabled in Stellenbosch when he broke the men's South African T38 400m record on Wednesday.

Buis, 23, clocked a time of 51.36 seconds to shave 0.23 off his national record in cool, damp conditions on the final day of the meeting.

It was his second gold medal of the championships following his victory in the 100m.

Buis, Paralympic silver medallist in the T38 100m in London two years ago, also won his 100m final comfortably in a time of 11.63.

Another athlete to cement her reputation as a potential world star was visually impaired sprinter Ilse Hayes, who clocked a South African record of 12.31 in the T13 100m on day two.

This performance, along with her superb 200m run of 26.37, makes her a gold medal hopeful at next year's world championships in Doha, Qatar.

Hayes won the F13 long jump gold medal at the London Paralympics in 2012.

T37 400m runner Charl du Toit was also impressive in winning in 53.26. – Sapa