Mild to moderate damage in knee extensor muscles accumulates after two bouts of maximal eccentric contractions.

Purpose: This study aimed to determine whether mild to moderate muscle damage accumulates on the knee extensors after two bouts of maximal eccentric contractions performed over two consecutive days.

Methods: Thirty participants performed an initial bout of maximal eccentric contractions of knee extensors during the first day of the protocol (ECC). Then, they were separated in two groups.