Let's face it, flat bars are an ergonomic nightmare. Don't believe me? Go to Tesco and find one of these trolleys:
Hold the 'flat bar' part of the handle and see how easily you can steer it. Then hold the 'bar end' part of the handle - with the insides of your wrists facing each other - and see how much easier it is to steer. Flat bars put your wrists at the wrong angle, it's that simple.
In a race, this may not matter, as you're not really riding for all that long. But if you're riding all day with a backpack, it makes a lot of difference. Flat bars are a racing fad which took off and infiltrated a large part of the MTB world. But in terms of ergonomics, they are a retrograde step.
That said, riser bars aren't that much better. Bar ends are a step in the right direction, but they can be dangerous in dismount situations if they are angled up too far.
I'm after trying a pair of these for long-distance riding...
...angled up pretty high a la the Tesco trolley handles. Definitely retro, I first saw them in Germany back in '92.
Dr. Matt...