Depending on the situation (person-task-environment), and with close monitoring, I use music:
– during PE classes to boost energy levels and overall ‘happiness’ (lyrics are awful…)
– during warming up for practices and tournaments
– for relaxation during down times
– etc etc
Often a very personal/individual choice and approach. I play the hand pan myself, and the combination of ‘playing’ and ‘listening’ is most relaxing/recovering/re-energizing/regenerating.