I am a 26 year old male. I weigh about 80 kilograms (180 pounds) and stand at 183cm tall (slightly over 6 feet).
I seem to have a very fast metabolism based on my lack of exercise and high fat/sugar diet and no weight gain.
I'm not looking to build a lot of muscle, I just want to have more than I do now...just some basic definition and a decent level of strength. I was considering buying a shake weight, although I have been told it would be better to just buy dumbbells.
What is the cheapest way to go about accomplishing my goal and how soon would I see results?