Final answer:
Physical exercise encompasses any activity that maintains or improves physical fitness and health, including everyday tasks. Adults are advised to do at least 30 minutes of moderate exercise daily. Fitness refers to being physically fit, whereas flexibility exercises such as yoga enhance muscle flexibility and motion.
Step-by-step explanation:
Physical exercise is any bodily activity that enhances or maintains physical fitness and overall health. This can range from structured activities such as walking, swimming, and yoga to everyday tasks like household chores, as long as these activities contribute to one's health and wellness. Current health guidelines recommend that adults engage in at least 30 minutes of moderate exercise a day to reap these health benefits.
When we talk about fitness, we are referring to the condition of being physically fit and healthy. It includes aspects such as cardiovascular and muscular fitness, flexibility, and body composition. Although not directly associated with the concept of natural selection, fitness in this context is crucial for improving an individual's quality of life.
Flexibility exercise, like yoga and tai chi, specifically focuses on stretching and lengthening muscles to improve range of motion and decrease injury risk. Through regular physical activity, individuals can improve not only their physical but also mental and emotional health.