I received Chrome/Cobalt Hip Resurfacing in 2006 and 2010. Now I am 70 years old. Overall my experience has been very positive. I have participated in extensive backpacking for the last 15 years with no issues, However, I came to realize that I needed to avoid lateral movement validated by trying to play handball and more recently skiing. I did experience some metallosis issues after trying to play handball in 2015. I began taking NAC, N-Acetyl-Cysteine, which I believe took care of the problem. My Chromium and Cobalt levels were reduced. Recently I have experienced the same symptoms of pain around my lower abdomen and hip areas which I am attributing to increased downhill skiing after buying an annual pass to our local ski resort. Today I was flagged for a high Cobalt Serum level of 2.2 which doesn't seem like it should be that serious, however, my pain and discomfort is substantial but it does appear to be improving from 2 weeks of inactivity. I am now wondering if the age of my Resurfaced Hips is coming into play. Does metal fatigue increase as the metal ages? It does appear that I will cut back substantially on my skiing.