Right now I'm about three weeks off cycle and I'm taking clenbuterol because of it's anti-catabolic effects only. I know that clen loses it's thermogenic properties after 2 weeks or so.....hence the 2 weeks on 2 weeks off cycling. Being that I'm only taking clen for it's anti-catabolic effects....do you think I'll need to continue 2 weeks on 2 weeks off....or should I just take it continuously?