Although some do not consider fitness as an official sport but only as an annex training method for other sports, some peoples practice regularly and as a single sport. This is why we also wanted to write about fitness.
For example in a gym, we find hundreds of bearings (ball bearings, roller bearings and needle). Indeed, we find bearings in the elements like the the pulley connecting the machine to the weights and in linear guides such as in the rowers. Training bikes are also full of ball bearings.
Have a great and sportly week-end!