i'm 20 years old and am 165cm or 5ft 5 and just started resistance training about 4 months ago. before i started the training, i weighed 47.5kg. i then trained twice a week only pausing for a while when i fell sick. my training routine includes both cardio as well as resistance training. however, after 4 months of training, not only have i gained weight (my weight now is 51.3kg), my friends have even commented that i look like i've gained weight (which presumably means i look fatter). not only that, my thighs look a little bigger and my jeans feel slightly tighter. i know that according to my previous height and weight i would be considered underweight, but i was fine with it and didnt want to gain any weight.
as for diet, before i started training, i used to eat anything i wanted (and didnt exercise at all) and i wouldnt put on weight at all. i continued eating whatever i wanted while i was training but have tried to eat more healthy foods recently. still my weight remains around the 51kg region. can someone tell me what's going on? even if i gain weight because muscle is heavier than fat, shouldnt i look slimmer because 1 pound of muscle takes up less space than one pound of fat? i really feel like giving up exercising.
as for diet, before i started training, i used to eat anything i wanted (and didnt exercise at all) and i wouldnt put on weight at all. i continued eating whatever i wanted while i was training but have tried to eat more healthy foods recently. still my weight remains around the 51kg region. can someone tell me what's going on? even if i gain weight because muscle is heavier than fat, shouldnt i look slimmer because 1 pound of muscle takes up less space than one pound of fat? i really feel like giving up exercising.