Explore the fascinating world of recycled pulsars in this comprehensive lecture from the "Neutron Stars and Black Holes" summer course. Delve into the Hulse-Taylor binary pulsar system, understand the process of spinning up neutron stars, and examine the concept of equilibrium period. Learn about the Alfven radius, accretion disks, and the Eddington luminosity limit. Investigate the origin and evolution of magnetic fields in neutron stars, including field decay mechanisms and the role of superfluidity and superconductivity in the core. Discover the importance of Feynman vortices and their interaction with magnetic flux tubes. Gain insights into the factors determining field decay in recycled pulsars and explore their population distribution. The lecture concludes with a preview of millisecond pulsars and includes a Q&A session, providing a comprehensive understanding of these fascinating astronomical objects.