Question:  I have been training hard for the Eco Challenge and other types of Ironman and strongman endurance training and wonder if guys attending your courses who are not at my level of fitness would slow down or prevent me from attaining the workout I need for my training regiment.

Answer:  Not at all. Sounds funny but your workout will be twice as good because you will find yourself carrying more than your share of the weight from those not at your level. This is teamwork, and with teamwork and teams, there is always a faster and slower person and that makes a team.