What specific muscle groups and power outputs can cyclists realistically expect to improve through dedicated resistance band training, and how do these gains translate to on-bike performance, particularly in areas such as sprinting, climbing, and endurance? Furthermore, are there any particular exercises or band configurations that are more effective than others in targeting key cycling muscles like the quadriceps, hamstrings, and glutes, and what role do variables like band tension, rep range, and rest periods play in optimizing strength gains for cycling?