Turbo trainers are very convenient as they enable you to ride in the comfort of your own home. This is especially useful when you are pressed for time, or if bad weather makes riding outdoors unfeasible.
Magnetic trainers control resistance using the force of a magnetic field. Fluid resistance trainers use a propeller that spins inside a fluid filled chamber. Virtual reality trainers create an online training environment where you can ride with or against people from all over the world. Air trainers control resistance by using blades to catch the air and create friction.