I wear my weaves back to back because for one, I haven't had a relaxer since Feb 08, so right now, about 90% of my hair is natural. It's super thick because I take aminos, and other weight lifting supplements (I lift 5 days a week) so I think that has helped with the thickness, although I do not take them for that purpose.
Meanwhile, I moisturize my edges morning and night. I use Talijah Waajid Moisturizing spray on my edges. I've never had an issue with thinning edges ever in life, so I guess I'm blessed in that aspect. I also spray it on my cornrows, etc. I oil my scalp and use mega tek when I can remember, so my hair does nothing but grow.
Now, my hair was done on March 13 (new stylist) and she even commented on how healthy and long my hair was (she had to take down my last install) with no breakage. How about I have over one inch of new growth already. I just noticed it the other day.
Do I give my hair a break? No. This hairstyle is condusive to my lifestyle since i practically live in the gym and sweat in my hair a lot. However, I still take care of it underneath with no problems at all.