All time favorite got to be

TRAINING :

Killing In The Name Of - RATM

Down With The Sickness - Disturbed

Kickstart My Heart - Motley Crue

CARDIO :

Sun and Moon (Club Mix) - Above & Beyond feat. Richard Bedford

As The Rush Comes Home (Armin Van Buuren remix) - Motorcycle

I Am What I Am (Lange remix) - Above & Beyond pres OceanLab

..............too many to name but some of my favorites