Working with triathletes is a very rewarding coaching experience. Triathletes are on the whole committed, enthusiastic, work-orientated, goal focussed athletes who are a pleasure to coach. Over the past ten years however, working with triathletes of all ages and levels, author has found that there are certain mistakes commonly made by many triathletes in their first year or two of training and competition. These mistakes are often made purely because the triathlete is so enthusiastic and determined to do well in the sport, that they often take short cuts or make poor training decisions based on anecdote rather than on intelligence and logic. Fore-warned is fore-armed, so here are the ten most common mistakes made by triathletes so you can avoid making them: 1 Increasing training volume too quickly. 2 Ignoring stretching and injury prevention. 3 Relying on technology instead of technique and skills 4 Spending too much time on your strongest leg instead of working on your weakest. 5 Avoiding speed work. 6 Using training hard as an excuse to eat and drink whatever you like. 7 Not taking time to rest and recover. 8 Training at too high an intensity. 9 Not planning an integrated, balanced training program. 10 Copying the "secrets" of champions.