NETA Personal Trainer Practice Exam

During which phase of resistance training is microtrama believed to lead to Delayed Onset Muscle Soreness (DOMS)?

1. Concentric phase

2. Isometric phase

3. Eccentric phase

4. Recovery phase

The correct answer is: Eccentric phase

The correct answer is the eccentric phase, as this phase of resistance training is particularly associated with microtrauma that can lead to Delayed Onset Muscle Soreness (DOMS). During the eccentric phase, muscles lengthen while under tension, which creates more significant strain on muscle fibers compared to the concentric phase where muscles shorten. This lengthening under load leads to small tears in muscle fibers, contributing to the microtrauma necessary for the subsequent soreness experienced in DOMS. Additionally, eccentric movements generate greater force and stress on the muscles and connective tissues, further enhancing the likelihood of damage and soreness after an intense workout. Understanding this can help trainers design effective workout programs that consider the occurrence of DOMS, allowing clients to manage their training and recovery appropriately.