Sorry, just read your first post now.

Yeah, it's seems as though it's a fine balance between building anaerobic fitness and using aerobic work as part of a routine.

I've just read an interesting article about this and it suggests that you should keep the anaerobic and aerobic work separate because the adaptations your body makes after doing something like pad work would be cancelled out by a long distance run straight after. The signals sent to the appropriate muscle fibres after pad work could be blocked by aerobic work which is going to affect your explosive power.

I think that you could probably get away with a run in the morning and the pad work at night without them affecting one another, but it is a fine balance.

I know Tyson isn't a Thai Boxer (so no body kicks from him!), but his explosive power was undeniable and he incorporated a 3 mile run in the morning and a 60 minute cycle in the early evening as a daily routine. It worked for him but everyone's different! :-)