Consider Quality...
These principles of web source evalution are drawn from The St. Martin's Handbook, 8th edition (p. 218-219):
Authorship
Sponsorship
Currency
Credibility
Looking for online information from a reputable organization? These websites may prove helpful:
APTA - Resources on scholarship & practice from the American Physical Therapy Assoc.
Gatorade Sports Science Institute - Research reports and FAQs supplied by Gatorade SSI
Medscape - Medical news & some full-text journal articles (requires free user account)
NATA - Resources for students from the National Athletic Trainers' Assoc.
NLM Catalog - Journal abbreviations for AMA
Try one of these options:
Google Advanced Search - provides more options for your search strategy
Google Advanced Scholar Search - search for scholarly articles
RefSeek - search for academic information on your topic