What adaptations occur in muscle tissue with resistance training?

Resistance training leads to muscle hypertrophy, which is the increase in muscle fiber size. This adaptation occurs because the mechanical overload from lifting weights causes micro-tears in the muscle fibers. The body responds by repairing these tears and, as a result, increases both the size and strength of the muscles.

Additionally, resistance training stimulates the synthesis of proteins within the muscle, leading to the development of more myofibrils and connective tissues, further contributing to the overall strength and size of the muscles. Increased strength is also a result of improved neuromuscular connections that enable more efficient motor unit recruitment during muscle contractions.

These adaptations contrast with the other options that describe opposite or unrelated changes in muscle tissue related to resistance training. Consequently, the development of muscle hypertrophy and increased strength is a hallmark outcome of consistent resistance training.