### Clue: Guardian etc in revolt over introduction of spinning as part of training (5-3)
### Answer: PRESS-UPS 
 ### Explanation: Definition: part of training
 PRESS(the media comprised of publications like the Guardian newspaper/etc.) + UP(in revolt/in an uprising) **placed above**(over, in a down clue) **1st letter of**(introduction of) "spinning". **
Aka push-ups: