When signing up for an Aikido program carefully examine the obligations that you are undertaking. Many Aikido schools have their own handbooks, which they give out when you register. If you are given a handbook, read it carefully. Most schools will ask you to sign a liability waiver before you step onto the mat. Don't let this frighten you. By asking students to sign waivers, the school is merely alerting them to the fact that the practice they are undertaking is physically demanding and potentially dangerous. If you are asked to sign a contract, don't be impulsive. Take a copy home and read it over when you won't be distracted.