5'5 and 122lbs (female/28yrs). My preferred weight is about 127. I'm coming back from a pretty ridiculous achilles injury that landed me somewhat immobile for the last 5-9 months. Before that I was a pretty dedicated runner running trails approximately 6x a week for anywhere from 3-6 miles at a time, although I did do some road running. After hurting my achilles I lost about 10lbs (all muscle ) but tried stationary biking to stay somewhat in shape although that was limited the first 5 months after the injury (and it's not easy cycling in a boot). I tend do eat pretty well though (organic, hate fried food, lots of veggies, fruits, water, no soda etc etc) which i think contributed to me not really gaining any weight... we are what we fuel ourselves with! I still cannot run but just bought a bike and am now biking approx. 16 miles a week to and from school/work. My hope is the bike will help me get some more muscle back in addition to helping my achilles heal and I can get back to running trails.