What does isotonic muscle contraction include?

Isotonic muscle contractions refer to the type of muscle contraction where the muscle length changes while the tension remains constant. This includes dynamic movements where the muscle actively shortens (concentric contraction) or lengthens (eccentric contraction) during the movement. Examples of isotonic contractions can be seen in various exercises where the muscle is engaged in movement, such as lifting weights or performing a Reformer Pilates exercise where the reformer carriage moves through a range of motion.

Dynamic contractions allow for the muscle to work through a full range of motion, promoting strength and endurance. This concept is foundational in both strength training and Pilates, emphasizing the importance of controlled, flowing movements that characterize effective exercise routines. In contrast, static contractions, flexibility exercises, and stabilization exercises do not involve the same dynamic change in muscle length, making them different in function and application. Therefore, the description of isotonic contractions as involving dynamic movements accurately captures this essential characteristic of muscle activity.