The body responds to stress through the activation of the fight-or-flight response, releasing hormones like cortisol and adrenaline. This response prepares the body to react to perceived threats, leading to increased heart rate, heightened awareness, and energy mobilization. Chronically elevated stress levels can lead to negative physical health outcomes such as elevated blood pressure, weakened immune function, increased muscle tension, and digestive issues. Managing stress through techniques like mindfulness, exercise, and adequate sleep is crucial for maintaining optimal physical health.