450)=450"> 本文选自雅思听力Section 2，难度不大 HINTS none 全文听写，英式拼法 订阅节目更方便
Also remember that it is not just important to exercise your body, but also your mind. Like any muscle or body part, it becomes more robust through exercise and stimulation. Playing chess, reading books or completing puzzles challenge our mind and keep it active and healthy. Use it or lose it, some might say. the type of lifestyle we lead also impacts enormously on our health. Getting enough sleep is vital and getting too little can result in us becoming stressed, irritable and can even speed up the aging process. What is "enough" varies from person to person. However, somewhere between six and eight hours per night is a good benchmark. Our bodies are given a chance to recuperate during sleep and it improves our concentration, appearance and boosts the immune system. More recent studies suggest that appropriate quantities of sleep can also help us burn calories and maintain a healthy weight.