To learn more about what's happening on the International Space Station at any given time, check out NASA's frequently-updated ISS blog or their page about the research and development work happening on ISS.
Depends on your body type and metabolism and your routine. But usually it takes around 3 to 4 weeks for visible results. For me it took me a couple of months to actually see any progress visually.
Answer by Bdaniel. Confidence votes 97. Don't expect to see physical results for about 6 weeks and remember, it takes at least 6 weeks for something to become habit forming, so don't quit no matter what. Try not to worry about what the scale says, but take great notice in how your clothes start to hang differently.