As is the case with training for all distances from 800 meters to 100K, optimal 5K training programs incorporate strength and power training to optimize performance. Although strength training is often excluded from many runners' training programs or treated as occasional cross-training to be completed on non-running days, it is the backbone of great endurance training. The following exercises, as well as additional exercises to develop strength and endurance, can be found in Running Science.
1. Side Sit-UpLie on one side with both legs extended and raised slightly off the floor. The side of the upper torso in contact with the floor should lie relaxed on the floor. Place the hand of the bottom arm on the floor to the front so that the arm is perpendicular to the body. Place the hand of the top arm lightly on the back of the head. (Do not pull on the head or neck during the exercise.)
More: 8 Best Core-Strengthening Exercises for Runners
Slowly raise the torso, contracting the abdominal muscles on the top side of the trunk and raising the legs at the same time. Slowly lower the upper torso and the legs back to the starting position on the floor to complete one rep. Don't let the upper body fall to the floor in an uncontrolled manner. Complete 15 reps on one side and then 15 on the other.
