"Delhi is too dusty and pollution level is high. Tintu Luka (her Rio Olympics bound 800m runner) had to cover heads and faces while doing practice and warm up at the tracks (at Jawaharlal Nehru Stadium). The meet could have been held at another venue," Usha said at the sidelines of the championships.
"How will the athletes get enough oxygen in this situation? It will have impact on their performance. It is very hot here and then there is this dust, it is not conducive for good performance," added 51-year-old Usha, a multiple gold medallist at the Asian Games and other international events.
Usha, who did the honours at the victory ceremony of women's 800m race in which Luka won a gold, was also critical of the organisers not providing electronic timers which flashes lap timing of the runners.
"It's OK for 100m or 200m races but in events like 800m or more distance, an athlete needs to know his or her timing after each lap and accordingly plan what to do in the remaining distance.
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Talking about Luka, who has already qualified for the Olympics, she said her ward will have at least three competitions in Europe -- at Grand Prix Level -- in the run-up to the Rio Games.
"Tintu will take part in events in London, Brussels and Prague before the Olympics. We are also trying if she can get an entry in the prestigious Diamond League opening leg in Doha on May 6. If she can get there and do well, then she can get entry in other legs of the Diamond League (which has 14 legs)," she said.