'When participating in endurance sports, such as triathlon, the body primarily utilizes its aerobic energy system. This means the main source of fuel for multisport performance comes from oxygen rather than from muscle glycogen (sugar stored in the muscles ready for immediate, short-term use). As a result, triathlon training relies primarily on the aerobic energy system and does not typically require raw strength; however, the development of power (strength and speed) can aid performance...' More
