Ivailo Dobrev

“Novices need to focus only on the frequency of training by getting into the pool and onto the road often. If they do this with no concern for how long the workout is—short is fine—or how hard it should be—easy is best—they will make great improvement in their first year in the sport. The intermediate triathlete in the second and third years in the sport should focus on increasing the durations of swims, bike rides, and runs. Year 4 is the time when a triathlete should begin to give greater emphasis to workout intensity.”
― Joe Friel, The Triathlete's Training Bible: The World's Most Comprehensive Training Guide