World Athletics leader Lord Coe stated that the location of warm-up areas during the Global Athletics Event in Tokyo is "not perfect", following concerns from athletes including Great Britain's Keely Hodgkinson.
The primary warm-up venue, where the main training area is located, is a two and a half kilometre journey from Japan National Stadium, a bus journey that takes about 15 minutes.
This implies competitors must catching a bus approximately 60 minutes before they compete, with Games 800m champion Hodgkinson describing the situation as "exhausting".
The president explained travel arrangements have been a challenge but the planning committee have done their utmost effort.
It's essential to ensure that we have excellent shuttle services.
He added, "It has been a struggle here because, of course, after the Olympics we lost the practice facility we used during the Games.
"It is a somewhat further away and we needed to manage congestion at different times of the day, various days of the week.
"Our team has carefully examined that. The situation is not ideal, but I believe the competitors are now acknowledging we've made every effort we were able to to optimize the conditions as feasible."
'Not Befitting the Worlds
Recently, after qualifying in Sunday's 800m championship race, the athlete said she might need to adjust her preparation.
Hodgkinson explained, "Regarding the pre-competition arrangement, you're warming up for nearly 120 minutes.
"This proves rather exhausting, so perhaps we should look at improving our approach for the final."
Last week, American athlete the competitor described it as "unusual", stating, "This is certainly not usual, but every competitor is in the same boat."
From Jamaica trainer the expert was more critical. In an interview with his national TVJ news channel, Francis described what he felt were several organizational challenges, including the "separation from the competition venue to the practice area".
Francis emphasized, "Those areas of a meet are inappropriate for the top meet of the season for the sport's governing body."
The governing body statement said, "Competitor conditions is of utmost importance for World Athletics and the host organizers at these global championships, and we have put a lot of thought into their preparations given the limitations of locations and venues.
"This type of configuration is not unique - similar to what occurred from previous Olympic Games and other elite track events.
"The rules concerning preparation, staging area and travel apply to every team and each competitor equally.
"The brilliant results we have witnessed to date from the participants demonstrate success."
Gene Testing 'The Right Thing to Do'
When speaking with BBC Sport, the president also confirmed all female athletes participating in the championships have completed recently introduced gene testing.
Rules requiring every competitor in the female category of international competitions to complete a one-time genetic examination came into force at the beginning of September.
The governing body states the gender verification - which detects the presence of a Y chromosome - is to protect the integrity of women's competition.
Coe did not disclose whether any competitors had been prevented from competing as a outcome of the test, administered via cheek swab, as these conversations are only conducted between the competitor and a designated health official.
The move follows information that between 50 and 60 athletes who experienced masculine development have been finalists in the female category at global and continental track events since 2000.
He stated, "We have achieved, as planned, all our woman athlete underwent screening.
"Admittedly, some difficulties, it was quite a compressed time frame, but the large proportion of the competitors and every national bodies really stepped up and helped us achieve this.
"It's the right thing to do for those truly committed to promoting and preserving the women's division and by implication female athletics."
