I was lifting 3-4 days per week and running upwards of 6 miles 2-3 days a week. This obviously led to overtraining (sore joints etc) and not much in the way of strength or mass gains. I've switched to a 3-day split (New Rules of Lifting).
My question is would 2 days of HIIT running or barbell complexes combined with 15-20 min of steady state running be too much or enough to maintin a high degree of cardiovascular conditioning.
3 days of heavy weight training does make barbell complexes unappealing at times. What sort of cardio/gpp do you work into your weight training programs?