There are a number of words in the world with the word "shuttle" attached to them. These include the space shuttle, the badminton shuttlecock, the familiar shuttle run for physical fitness, and the shuttle buses often seen at tourist attractions and events.
The word "shuttle" refers to a tool used in weaving. In weaving, the warp and weft yarns are woven alternately to make fabric, and the shuttle is used to thread the weft yarns. The weft is wound around the shuttle and passed back and forth to weave the threads.
This video will make it easier to understand.
The shuttle is moving back and forth, back and forth. The word "shuttle" comes to mean "something that goes back and forth" because of this movement.
The space shuttle is a shuttle that travels back and forth between space and Earth.
A shuttle bus is a bus that travels back and forth in a short cycle.
A shuttlecock is a badminton ball played back and forth across a net.
Shuttle run is a competition in which the time is measured while running back and forth.
This is the same as "shuttlecock" in badminton.
Nowadays, weaving is seldom done. However, the names of weaving tools are quoted in many words, indicating that weaving was closely related to daily life in the past.