I wouldn't think it would be helpful to lose weight, the issue really is that turning fat stores into calories is quite slow (for how many calories he is consum

I wouldn't think it would be helpful to lose weight, the issue really is that turning fat stores into calories is quite slow (for how many calories he is consuming) and it can't be relied on as a source of energy so you just end up more tired I think. You need some amount of weight for muscle to push your body forward and I don't know that there is a big aerodynamic or energy advantage to sacrificing weight for that.