Upgrade options for hybrid Scott Sub10 bars? I currently have a flat bar on a hybrid bike (the Scott Sub10). It's a great bike, and I had the saddle height and angle adjusted at the store, so I've got the right leg angle on the down stroke and this, that, and the other, too.

I commute about 2-5 miles per day, depending on errands, and my body positioning tires me. I put a lot of my body weight forward, and as a result my arms and shoulders are tired at the end of the ride and my hands hurt. I don't think this is a result of the bar stem height being too low, though.

Anyway, I spoke to a guy at my local bike shop and he told me that trekking bars would be a little out of the question, but he wouldn't say why. I suspect it is because of the brake/shifter system. Only when pressured would he reveal there were bar ends to give drop hand positions. What's so bad about these?

Essentially I'm asking for some corroboration here. I want to know if bar ends are the best choice, or if I can do something like a trekking bar and be better off, or if even I can adjust the bike somehow. (A full drop bar being out of the question due to price)
You should look at having the bike re-adjusted. 

Your complaint, 


  my body positioning tires me. I put a lot of my body weight forward, and as a result my arms and shoulders are tired at the end of the ride and my hands hurt.


Is indicative of a bike which is set up too long/too low.  It is possible that your body will adapt to the position, in time. 

Changing to a drop bar, or adding bar ends in the dropped position will only make the bike longer and lower, which will exacerbate the problem you are complaining about.

In addition, the stock bars on the Sub 10 are a mountain bike rider style bar, with a width of about 24.5 inches. 

Adding bar ends in a dropped position on that bar will also make your hand position exceptionally wide, which will affect the handling of the bike. In addition, it will put you in a riding position where you have no access to the brakes or shifters, which is unsafe. 

You mentioned that the shop employee was reluctant to mention these bar ends. That is likely because he feels that they are inappropriate for your bike, and/or will not solve your problem. And I would agree. 

I expect a solution would require a shorter stem and more rise on the bar, assuming the frame is the correct size. 

It is impossible for us to say for sure though, because we can't see you on the bike. 

Good Luck. :)