What is the primary purpose of including flexibility training in a fitness program?

Flexibility training is an essential component of a well-rounded fitness program primarily because it focuses on improving the range of motion of the joints and overall flexibility of the muscles. This increased range of motion allows for more effective movement patterns during exercises and daily activities, reducing the risk of injuries and enhancing performance in various physical tasks.

Incorporating flexibility training can lead to a number of benefits, such as improved posture, reduced muscle tension, and better circulation. It also helps in the recovery process after workouts by promoting blood flow and decreasing soreness. All these factors contribute to a more effective fitness program, which ultimately helps participants achieve their fitness goals.

The other choices, such as increasing muscle mass or enhancing metabolic rate, relate to different aspects of fitness that are more accurately addressed through strength training and aerobic exercises, respectively. Reducing overall workout time does not align with the primary intent of flexibility training, which is to facilitate proper movement and prevent injuries rather than to focus on efficiency in terms of time spent exercising.