A coaching program is essential. Even if you use it only as a guide, it is helpful to have a structured plan to go off of. You can then tailor it based on your needs, the need for rest time, the need to work around injury. DC Tri Club, one of the Nation’s largest Triathlon clubs offers a great half IM and full IM training program Yes, Endurance Athletes Need Strength Training Having a strong core and good leg and upper body strength developed by years of proper training is a huge help. Off season strength and conditioning is essential to preventing injury and optimizing performance. Crossfit is a great way to work on functional strength and movement which will help the endurance athlete optimize their strength, power and performance. Trident Crossfit services Old Town Alexandria, Potomac Yard, Arlington and is one of the leading Crossfit affiliates in the DC Metro area.