This document discusses phases of speeding in rollerblades. It includes an introduction and sections on the phases of speeding, position analysis, muscles involved, bones involved, joints involved, and planes, axes, and angles. The phases of speeding section notes several muscles like the quadriceps, hamstrings, biceps, and triceps that are involved. It also lists sagittal, transverse, mediolateral, and longitudinal as planes of motion. Bones like the femur and muscles like the gastrocnemius are mentioned as being involved in rollerblading motions.