How can I overcome my snoring problem?

I've always had a snoring problem since I was a kid. It may be sleep apnea, but whenever I find solutions, it always tells me to lose weight. My weight usually fluctuates between 130 and 140 pounds, but I also practice martial arts quite often, which may lead to some muscle weight. Some days my snoring is decent, but on some days, it can be so bad that it would wake up people sleeping in the same room.