"We'd have preferred to have a week in the UK with the squad and a week in New Zealand. We've known about the schedule for 12 months and it's difficult to change that.
Image: Ross Moriarty in action for the British and Irish Lions. Pictured Credit: David Davies/PA Wire/PA Images
"I think that the powers that be in four years' time will think about the schedule and the importance of having the right preparation and the right time.
"We ran the non-23 players this morning and they had a real blow-out because a number of them are still struggling to sleep.
"So we knew it was going to be difficult in terms of adjusting to that and preparing in such a short period. Ross Moriarty has got a back spasm, and so has Kyle Sinckler.
Gatland went on to point out that his players were fulfilling community obligations yesterday, which he believes contributed to the fatigue.