From Paul DavisMy question is regarding further improvement of my 2,000 metre Personal Best. I seem to be stuck in the 6:50 range for my 2,000 metres and would appreciate any training ideas on how to break the 6:50 barrier. I endeavour to mix the weekly training sessions with anaerobic and aerobic workouts and supplement this with weight work in the gym. Typical anaerobic sessions are carried out over 500m, or 2 minutes with 2 minutes recovery repeated six times. Aerobic conditioning would be between 40 - 60 minutes with MHR between 70 - 80%.I recently read that a 2,000 metre piece is 70% aerobic and 30% anaerobic. Based on this, should further emphasis be placed on aerobic conditioning and increasing the repetitions in the gym?Any thoughts gratefully received.*************Paul,The exact contribution from the aerobic and anaerobic energy systems will vary from person to person and the 70%-30% is an average figure. The sample of training you sent me does address both systems so you are not doing anything wrong but still, you are stuck at this 6.50 level. This could mean one of two things: 1. This is it old fruit, the end of the line, with the future being all down hill thanks to old Father Time. 2. You are going to have to raise your basic training intensity level. How? I hear you type! First step is to increase your basic strength with weight training for 6 weeks. While you are doing this don't do any long pieces on the machine, although you can do some short interval work. Follow this with your long distance aerobic work but using your newfound strength to train at a higher intensity. You can do some strength retention sessions once or twice a week during this phase. Follow this with a programme of intensive intervals and fast weights, then taper and Bob's your uncle, either death or glory.Tel