Which of the following practices is considered essential for maintaining muscle fitness?

Regular strength and flexibility training is essential for maintaining muscle fitness because it helps to build and preserve muscle mass while also enhancing the overall functional capacity of the muscles. Strength training, such as lifting weights or using resistance bands, stimulates muscle fibers, promoting growth and strength. Additionally, flexibility training, which includes stretching exercises, is important for maintaining the elasticity of muscles and the range of motion in joints. Together, these practices prevent injury, improve balance and coordination, and contribute to overall physical performance.

In contrast, practices like decreasing physical activity levels or avoiding nutrient intake would negatively impact muscle health and fitness. Adequate hydration, while important, is not sufficient on its own to maintain muscle fitness; it must be complemented by regular physical activity. Therefore, engaging in both strength and flexibility training is fundamental for achieving and sustaining muscle fitness.