True or false: The initial respiratory response to exercise is characterized by an increase in tidal volume (VT) and breathing frequency (Fb).

The statement is true because the initial respiratory response to exercise indeed involves an increase in both tidal volume and breathing frequency. During physical activity, the body requires more oxygen and needs to expel more carbon dioxide, which stimulates the respiratory system to enhance ventilation.

In the early stages of exercise, the body first increases tidal volume, which is the amount of air inhaled or exhaled with each breath. This increase allows for greater oxygen intake per breath. Alongside this, the breathing frequency, or the rate of breaths taken per minute, also increases to further enhance ventilation.

Both of these adjustments work together to efficiently meet the heightened demands for oxygen and the removal of carbon dioxide, which is critical during any level of exercise, not just in trained individuals or during high-intensity workouts. Therefore, the response is applicable to all individuals participating in physical activity.