Some background: adventure races, century bike rides, bike touring, 5/10k races, rock-climbing, mountaineering. In the past, all of my exercise was aimed at improving performance in the above activities. Most recent exercise regimen consisted of olympic weight lifting 3-4 times a week, occassional bike rides, and walking. Due to school/work commitments and traveling, I haven't exercised since July 2010. I have never been sedentary for this long. I'm looking for some tips on how to ease back into exercise given my goals and the fact that I'm eating RZC. Current goals are to build muscle mass and improve general health and fitness. Planning to eventually lift heavy weights 2-3 times/week, do a Crossfit style workout once a week, and maybe sprint or do a trail run once a week. Basically, looking for advice from people who resumed exercising while eating zero or low-carb. Thanks!