Hi i'm new to this help me!!!!!@#

try http://www.beginnertriathlete.com/prev%20nextlevel.htm  this is exactly what i used (skinny guy) to put on mass...maybe others will chime in...

Wow!!!! 6' and 121lb......that is quite thin. I think I would check with a Doctor or nutritionalist on what types of food to eat to put on some weight also. I have problems both putting on and taking off weight. I am 6'1 and 165-170 lbs. I really don't want to build that much bulk because I worry that it may slow me down. I do lift though to make me stronger and more powerful while swimming biking and running.

Check into plans such as the one Ron posted (you have to take off the 3 periods at the end of the web address) and stick with something for atleast 3 weeks before expecting to see drastic results. Good luck and ask as many questions as you have.....someone will have some experience on the subject.

If you are not ill, do not worry about it! I am 6 feet also and weighed 135 pounds for the longest time. People kept telling me that I was too thin and that I should put on weight. I did (put on weight) and I kept putting it on. I now weigh 218 pounds and wish that I weighed 135 again; it would be so much easier on the joints. Do NOT try to gain weight by changing your eating habits. There are many beneficial ways to gain muscle mass without ingesting an inordinate amount of food. If you really want to gain GOOD weight, then try weight lifting, speed sprinting, or even racing a single gear track bike.