Both fell unconscious after the race and George described it as "the most gruelling race I ever ran."

Well, at least the most gruelling part of the journey is over with, he remarked.

For Bale, the most gruelling part about playing Batman was the suit.

Mont Ventoux is the one of the most gruelling climbs in the Tour de France.

The race is one of the longest, hardest and most gruelling school runs in the country and has been a tradition for well over 100 years.

Canada hosted one of the world's longest and most gruelling rallies in the 1960s, the Shell 4000 Rally.

We have been warned that this will be the most gruelling leg of our trip.

They had survived the most gruelling tests that Planetfest could provide.

This was the start of the most gruelling week of my life.

The most gruelling of the three disciplines, because of its sheer length, means it is a test of endurance for rider and horse.