Or not, I mean it's not like this has been known for ages... Oh wait it has. Body builders have been ingesting supplements which increase nitric oxide for years now with benefits along the lines of improved endurance / recovery / weight loss.
As is pointed out in a bodybuilding article I once read, the ingestation of Nitric Oxide combined with exercise increases the rate at which the body uses up glucose, effectively converting it to a form available to the body faster, then absorbing it faster. Here's the main quote.
experiment was 2 sets of people, some ingesting a nitric oxide supplement, others not, they then cycled for 2 hours, followed by a 15 minute all out cycling period.
During this time glucose levels were measured in the body and it was noted that those who had taken the L-arginine had a significantly higher glucose rate of appearance, glucose rate of disappearance, and glucose clearance rate. This demonstrates that these athletes were taking up the glucose faster into the muscle cells as the exercise persisted.
In addition to this, the supplement also supported the increase of nonesterified fatty acid concentration as well as glycerol in the body, potentially pointing to the burning up of fat as fuel.
Burning fat as fuel is another important note to this for those looking to lose weight. During the first 10 minutes or so of exercise the body burns carbs as fuel, from 10-60 minutes the body turns to burning fat. Normally from 60 minutes + the body will switch to burning muscle as fuel since proteins burn slower and it's slow energy you need.
Although I did read another study that still pointed out that going over 50 minutes was bad for fat loss, the study measured cortisol rates (stress hormone, which can increase fat storage) cortisol levels gradually decreased as people exercised, up to about 45 minutes, after which cortisol levels began to skyrocket. Lots and lots of different things you need to take into account while exercising for weight loss.