Regular exercise can increase your body's energy expenditure(能量消耗)and it is also a great way (improve) your productivity and mental focus throughout the day. The increased energy levels that occur as a result of exercise (be) also likely to lead to more active habits throughout the day, such as taking the stairs rather than the lift, or (walk) to speak to workmates instead emailing. This increased activity will then bring physical and mental benefits.
Physical activity can help us to improve the length and the quality(质量)of our sleep, will in turn make further contributions to our health and wellbeing. While there is no absolute figure(绝对数值) we should aim for in terms of sleep time, most people will find that they fall somewhere between 6-9 hours a night. Quality is (certain) more important than quantity.
Regular physical activity can help us to manage life's stress much (well) as a distraction technique. As (discuss), exercise can help you achieve a more positive outlook as well as improving sleep quality, both of which are important in managing stress. Also, is thought that exercise can help to improve our ability to activate the control centers in our brain and the nervous system, which is very (help) when we are under stress.