This 11 week training plan, written by former Duathlon Natonial Champion and Duathlon.com founder Eric Schwartz, is for advanced duathletes with at least 3 years racing experience. This is very similar to a plan I wrote for an athlete who won an age group gold medal at the Duathlon World Championships (under 40) at a distance of 15k run, 80k bike, and 7.5k run. It prescribes 8-15 hours per week of training.
You should not start this plan unless you have an excellent aerobic base AND you have had some intensity in your training. This plan has a higher ratio of intense workouts than most athletes should be doing. If you purchase this plan you may need to reduce the intensity and/or duration of some of the workouts. Only serious duathletes with significant experience and knowledge should purchase this plan.
Testimonials for Eric's Duathlon Training Plans are available here: http://goo.gl/pv8ZA
Duathlon Training Plan FAQs: http://bit.ly/DuathlonFAQ
If you have additional questions about this plan email Eric.Boulder@gmail.com and I'll respond quickly.