The phrase "as he competes" is correct and usable in written English.
It can be used to describe actions or behaviors occurring simultaneously with someone competing in a contest or event.
Example: "He shows remarkable focus and determination as he competes in the championship."
Alternatives: "while he competes" or "during his competition".
Aliaksandr Faminou, of Belarus, rides his horse Coolroy Piter as he competes in the equestrian eventing cross-country stage.
Photograph: Hannah Johnston/Getty 1.47pm BST Senegal's Malick Fall looks dramatic as he competes in the men's 100m breaststroke.
Photograph: Nic Bothma/EPA 1.55pm BST Ashton Eaton strains as he competes in the men's decathlon shot put.
In short, his résumé is campaign gold as he competes in one of the closest House races this year.
Rich Wilson SM '76 aboard his 60-foot racing yacht, Great American III, as he competes in the Vendée Globe solo sailboat race.
The politics of the auto bailout have become a vexing problem for Mr. Romney as he competes fiercely with President Obama for Ohio.
The Italians played with great vigour and Boateng's handball as he competed with Giorgio Chiellini gave Bonucci the chance to equalise from the penalty spot.
Harry kept his distance as he competed with his fierce rival, the late James Whitaker, to report on the troubled relationship between Prince Charles and Princess Diana.
Not afraid to relocate winger to stand, he trained as he competed, and as such was banned from marking Best, even though the two were part of the same social group that also included Sadler, Jimmy Ryan and John Fitzpatrick.
Instead, Johnson, who is 22, watched as a sister and supporter, cheering on her younger brother, Anders, a member of the men's team, as he competed in the qualification round on the large hill.
Instead, the 22-year-old Johnson was there to cheer on her younger brother, Anders Johnson, a member of the men's team, as he competed in the qualification round on the large hill.
