I took these a few weeks ago but am just getting to messing with them now. The gym i my opinion had bad lighting that cycled which gave me problems to say the least. I posted a pic of the lights so you guys can tell me if there really not that bad.....I feel I underexposed some of these so cc and pp advice is appreciated.
^+1...the last image is the only one that looks relatively sharp. EXIF says you're shooting at 1/1600, f1.8 w/ that one, and some others are 1/2500.
I would suggest shooting Manual, and going to f2 or f2.8 to get a little more DOF. And your shutter speed could probably be 1/1000 or 1/800 for these boys.
I'm not familiar w/ the Canon focusing modes, but perhaps try a single point mode to rule out any issues w/ Dynamic jumping around to adjacent areas other than your primary subject.
