Suzaku might be too self-loathing for that. And Euphie did love Lelouch enough to still keep his secret, even after he shot her. I could see it either way.
MastaofBitches said:
He didn't seem to have any issues with stamina in R1, so I blame his Dad for fucking with his head.
I have a long-standing head canon about Lelouch's drop in physical abilities between seasons: it's because Nunnally is gone. While she was around, he made sure he was capable of helping her in and out of her wheelchair, bed, anything she would need if Sayoko wasn't around, so he stayed reasonably fit. Not an athlete or anything, but somewhat capable. Come R2, Rolo replaces her and doesn't need any of the same care, so Lelouch spends a year getting lazy with no motivation to stay in any kind of shape.