Not true for me. I was able to modulate my weight up by about 25 lbs with relatively the same bodyfat (same size 32 jeans) in a year by gaining about 2 lbs per week and lifting heavy and using full body routine 3 times a week. I would gain around 16lbs in a 8-10 week period and I would carefully diet back over the next 8-10 weeks using higher reps and lower calories and lose about 5-8 lbs. All of this was without any steroids, pro-hormones, etcGranted, I was pretty skinny but had trained over the past five years - I just wasn't eating enough or consistently to gain anything. Once I put my mind to it, I was pretty regimented and weighed myself almost evey day (same time in the morning). A couple of times I just got sick of eating so much food but it would usually pass in a couple of hours. Started out at about 150lbs @ 5'9" (I said skinny didn't I?) and ended up around 175 with a visible six pack. I would just increase my calorie count each week until I started gaining 1-2 lbs a week. My strength went up each time I went on a bulk cyle. Everybody thought I was taking steriods because I was taking 15 huge amino acid pills a day, liver tablets (questionable help) and a bunch of different vitamins. I tried to push my self over 200lbs (at less than 10% bodyfat) using this method but couldn't get over 196. Then wife, kids, higher paying job kicked in and couldn't really devote the time to keep it up. So I think that this method works but you obviously have a limit to how far you can push it naturally.