I just turned 30 about 6 months back and I had always heard that as you get older its harder to lose weight. I have always been big into fitness but I was always bad at "stick-to-it-iveness" and would never go with perfect eating and lifting for over 4 weeks. I normally thereafter might put on 10lbs but I could easily drop those 10 again in about 2 weeks of doing everything right again. I'm 6'2" and after being a fatty in high school dropped down to 195. I hovered within 5 lbs of that up and down for almost a decade. (5lbs up made it hard to fit in my jeans). I then was going into the SEALs and due to malnourishment abroad while training, I dropped down to 183lbs and looked sickly and gaunt. After I came back to the US for a month, within 30 days I ballooned up to 215lbs. I managed to drop down to 205lbs with my old routine but my body refused to go below 204lbs. However, I still wore the same stuff as when I was 195lbs and visibly looked the same for the most part except a more developed chest (yay for all those push-ups!).
Anyway, due to recent medical reasons, I had to be oafish for almost 2 months recently and got up to 215lbs. again. So I started up my routine again and have been eating perfectly going on my fourth week now and...... I'm almost 220lbs. I'm STILL wearing the same size clothes (as 195lb days) and have my "V" back. I have never gained weight from this routine. I look markedly skinnier though and fit into things better than I did before I started. I am beyond confused by this and although I don't look it, I feel very odd describing myself to people as 6'2" 220lbs. People are saying to me that I'm building muscle far faster than I am losing weight but.... I highly doubt I gained 5lbs of muscle in 3 weeks. I'm guessing the weight just isn't coming off as easy due to my age? I would love to hear theories on this one because I feel like I just don't know my body anymore!
Just to clarify, when I say routine I don't mean I've been doing the same thing since the dawn of time as far as each workout but rather I mean in general the amount I work out has been consistent across the decade+.
Cardio in the morning on an empty stomach (currently Insanity)
Push-ups at Noon before lunch
Lifting after work followed by 20 minutes of intense cardio.
Diet is always pretty much the same, eat 6 times a day (calories are appropriate for training level), protein intake just above my weight minus fat %, no carbs in dinner, small protein intake before sleep, no food with artificial additives (except whey protein powder).