Blackcrusader
Contributor
I recently had to dive Air for a number of days in remote parts of the Philippines. I would normally always opt for Nitrox when available. The days of diving air left me much more fatigued than when I could get nitrox on other parts of the trip.
I've never noticed the difference even when doing 35 dives in 12 days just on air. Did so last month in Maldives. But then not going out to bars and partying all night and getting a good food intake and sleep seems to work for me.
I like nitrox for the extended NDL on dives though.