In September 2011 I tore my Achilles tendon in a road race. This sidelined almost all physical activity for 6 months during which time I slipped back to over 190 pounds. I was able to do some light exercise by rowing and using a mounted stationary bike after about 3 months, but it was a far cry from the 30 miles a week of running I was doing. I also basically got depressed and sat on a couch and played video games and ate crap.
In February I was able to resume an active lifestyle and I started to push my weight back down.