We all had tons if questions when we first stumbled upon this site. Many people here are super helpful, so never feel bad for asking questions.

I had the same concerns about CG, especially since I do martial arts 4-5 days a week. The first thing to keep in mind is that co-washing (using only conditioner to cleanse your hair) is not mandatory for CG. The definition of CG is eliminating sulfates and silicones- how you do that is a personal preference. The second edition of Curly Girl by Lorraine Massey (where the name CG came from) does indicate that sulfate-free cleansers can be used. There are an abundance of sulfate-free shampoos (low-poos) to choose from- just make sure you choose one without silicones. I still rotate in a sulfate shampoo once every few weeks, usually when I do my PT/DT, but I found one that's silicone-free and extremely gentle. I found that the biggest improvement in my hair was from eliminating non-water-soluble silicone from my hair products, especially my cleanser and conditioner, because I was able to get more moisture into my hair.

I found that I can co-wash as long as I use a very light conditioner (my favorite is VO5 Vanilla Mint Tea) and massage my scalp really well while cleansing an while rinsing. There are also "cleansing conditioners" available, that will give a little more cleansing power than regular conditioner, but will still be gentle on hair. I'm a huge fan of these.

Modified CG since 11/5/11
CLEANSE: CJ Daily Fix, DevaCare No-Poo, CHS Treatment Shampoo
RO: SS Caitlin's Conditioner, CJ Beauticurls Strengthening
LI: SS Repairing Protein Treatment, CHS Silk Leave-In
STYLE: Re:Coil, Curl Keeper, Deva Ultra Defining Gel, Curls Rock Amplifier,Sweet Curls Elixirs Okra Gel and Hard Hold Gel, SS Curl Enhancing Jelly and Firm Hold Gel