How do I calculate my body fat percentage using skin fold calipers? Which Personal Fitness Trainer certification is the best to look for?

The best certifications are the ACSM and the NSCA. They are more difficult tests than the ACE but they are professionally more sound. Usually if you buy a caliper, it comes with some instructions. check out these sights for some calipers. http://www.bodytrends.com/crebook.htm order a book for $2 http://www.bodytrends.com/buycalip.htm some good info on calipers.