Bodybuilders know that cardio is a necessary evil to get shredded. But most, and rightfully so, consider cardio as a risky addition to training, as it may hinder muscle growth. Decrements seen in strength, power, and hypertrophy with the addition of endurance exercise to a resistance training routine is supported by research, and has been termed "concurrent training."
We decided to start a series here on ABC, that is dedicated to showing how to minimize, and hopefully, eliminate the negative effects seen from concurrent training, while still getting the added benefits of fat loss. This will be a three part series. Below is part I, and our references for the series. Part I discusses mechanisms and proposes a model to explain decrements seen during concurrent training.