I also got the impression from a Nick Hewer interview that tasks are 'back-to-back'
I can't find that interview, but this is part of an article published about the same time:
TV presenter Nick Hewer has revealed the real reason he quit The Apprentice after a decade – he simply ‘ran out of puff.’
The 71-year-old former advisor to Lord Sugar on the programme, said he had left ‘with reluctance’ but added: ‘the physicality of it became too much and I found it exhausting. I didn’t have the energy.
‘It’s always a very long shoot and you are working all day, every day and running down pavements. I can’t do running down pavements anymore and writing briefing notes. I was puffed out.’
Now the host of afternoon TV show Countdown, Nick also revealed that Alan Sugar is seldom on the scene during filming – ‘he is only there for the boardrooms and briefing and relied on us to tell him everything. And so the debriefing sessions are painful because he wants to know who did what and at what time….’
The Daily Mail 14th September 2015