Jason Leitch has explained the limitation of Scottish football's elite bubbles after Neil Lennon revealed Celtic will take six buses to Ross County.
The Parkhead boss rejected the notion footballers are "privileged" as he revealed the stringent measures taken to ferry them to and from games.
Social distancing requirements mean the club cannot put their travelling party on a single bus.
Leitch insists the bubbles used in most sports, including football, are "partial" with players and staff allowed home to their families.
This is in contrast to the NBA's playoff bubble from the summer and Formula 1, where those inside the bubble are completely cut off and do not need to distance.
Speaking on BBC's Off The Ball, Leitch was asked by a listener why Celtic have to take so many buses on their trip to Dingwall.
"The bubble is partial. We've done this before but let me quickly do it again," the national clinical director said.
"There are only two or three examples of full bubbles in the elite sports world.
"One is the NBA and the other is Formula 1, absolutely secure. Everybody who goes into the bubble isolates and is tested before they go in and they don't leave.
"They don't see their family, they don't go to Boots the chemist and they don't go and get their shopping.
"In Formula 1, that's journalists, drivers, the team. That's why they don't have to distance, they are in a secure bubble.
"They go on private jets from race to race and the NBA to exactly the same.
"Most sports, the Bundesliga, English Premier League, SPFL, SRU, are using partial bubbles where they are as careful as they can be but are still allowed to go home to their families.
"That is not as secure, therefore, the exemption for distancing is only when playing or training, not when you're off the pitch.
"That's the difference between the full bubble and the partial one."
