why does weight training improve muscular strength more than cardiorespiratory fitness?

Answer:

Weight - training primarily targets muscle fibers through resistance, causing micro - tears. The body repairs these by building more muscle proteins, increasing muscle strength. In contrast, it doesn't directly and as intensively stimulate the heart and lungs (cardiorespiratory system) as activities like running or cycling do. Cardio exercises are more effective for improving cardiorespiratory fitness as they increase heart rate and breathing rate for an extended time, strengthening the heart and lungs. So weight - training improves muscular strength more than cardiorespiratory fitness.

Brief Explanations:

Weight - training focuses on muscle resistance, cardio on heart/lung endurance.