I recently started lifting free weights. Some sites, including the Mayo Clinic, say that all you need is one set to exhaustion to get all the benefits.

Is this right? Doing just one set is pretty attractive.

Here's the Mayo site that says to do one set of 12:
http://www.mayoclinic.com/health/wei...aining/HQ01627

I am just in this for general fitness, not any intense bulking up.

Thanks.