The term "eccentric portion" refers to a part or aspect of something that is unusual, odd, or different from what is considered normal or conventional. Full definition
For the lateral elbow, perform the same routine — 3 sets of 15 reps every day with a 3 - second long eccentric portion and 2 minutes of rest between sets. (fitnessandpower.com)
Perform 3 sets of 15 reps on a daily basis, with a 3 - second long eccentric portion and 2 minutes of rest between sets. (fitnessandpower.com)
These strategies include plyometrics, resistance training with an emphasis on eccentric portion of repetitions, down - hill running and over-speed training. (sweatscience.com)