The cardiovascular system, comprising the heart and blood vessels, is responsible for delivering oxygen and nutrients to the muscles and removing waste products. During dance fitness, the increased intensity of movement demands more oxygen, leading to an elevated heart rate and oxygen consumption.

Eccentric contractions occur when muscles lengthen while under tension. These contractions are common in dance moves that involve controlled lowering of the body or limbs against gravity, such as lowering into a squat or performing a slow leg extension.

Endorphins are natural painkillers and mood boosters released by the body during exercise, including dance fitness. They contribute to the sense of euphoria and well-being often experienced after a dance fitness session.

Musical entrainment refers to the tendency for human movement to synchronize with the tempo and rhythm of music. This phenomenon is observed in dance fitness, where the music guides and influences the movements of the participants.

The anaerobic alactic system provides energy for short, intense bursts of activity without producing lactic acid. This system relies on stored muscle glycogen and is utilized during high-intensity dance moves that require quick bursts of energy.

Proprioception is the body's ability to sense its position and movement in space. It plays a crucial role in maintaining balance and coordination during dance fitness, allowing dancers to move smoothly and gracefully.

Insulin is a hormone produced by the pancreas that helps regulate blood sugar levels. During dance fitness, insulin helps maintain blood sugar levels by promoting the uptake of glucose into muscles for energy.

Music-induced emotion refers to the ability of music to elicit emotional responses and memories. This phenomenon is often observed in dance fitness, where the music can create a motivating and uplifting atmosphere, enhancing the overall workout experience.

Concentric contractions occur when muscles shorten while under tension. These contractions are common in dance moves that involve lifting or moving the body against gravity, such as jumping or performing a bicep curl.

The vestibular system is responsible for maintaining balance and equilibrium. It plays a crucial role in dance fitness by helping dancers maintain their balance and orientation during complex movements and changes in direction.

The aerobic system provides energy for prolonged, low-intensity activities by utilizing oxygen to break down carbohydrates and fats. This system is primarily responsible for energy production during long, steady-state dance fitness routines.

Perceived exertion modulation refers to the ability of music to influence the perception of effort and exertion during exercise. Music can make exercise feel easier or harder, depending on its tempo, rhythm, and emotional content.

Isometric contractions occur when muscles contract without changing length. These contractions are common in dance moves that involve holding a static position, such as a plank or a wall sit.

The somatosensory system is responsible for sensing and interpreting sensory information from the body, including touch, pressure, and proprioception. It plays a crucial role in dance fitness by allowing dancers to feel the ground beneath them, sense the position of their body in space, and coordinate their movements.

The anaerobic lactic system provides energy for moderate-intensity activities by breaking down carbohydrates without oxygen. This system produces lactic acid as a byproduct, which can contribute to muscle fatigue if not cleared quickly.