Beautiful photo. For a 1:10 in the 100 Backstroke, this girl has a smooth stroke, and her turnover is fairly high too. I know how hard it is to shoot in poorly lit indoor pools. I swam for 16 years. One of my favorite shots is the start of backstroke races when the swimmer's back is arched out over the pool. Unfortunately, flash photography isn't allowed, and once again, slower shutter speeds make it hard to grab. I think you did a great job here. Probably could have bumped to 800 or even 1600 ISO as the Canons generally have low noise at ISOs even up to 1600. It probably could have gained you some shutter speed.
a very difficult shot, to say the least. too bad this was basic editing; i imagine you could do a lot with this shot if you could process it a bit more aggressively.
Excellent tracking, especially at angle of movement that is not straight on. Exposure time just right to catch and communicate action, but not lose the environment's detail completely.
I suppose the crop is close on the swimmer to eliminate the other entrants in the race?
But I think the inclusion of others would serve well to give the race more meaning.
Also, it seems a bit "claustrophobic" in the frame.
The old adage of "give the person some space to swim into" would work well here.
Not really getting a feeling of panning in this shot. You also need to blur the background to show motion. Since the subject is IN the background thats not likely to happen with this shot. Sorry.. :(