Slips occur when there is insufficient friction or traction between the footwear and the floor surface. A trip occurs when a foot strikes or collides with an object, causing a loss of balance and, in most cases, a fall. According to studies, 66 percent of falls happen on the same level as a consequence of a slip or trip. The remaining 34 percent of falls are due to other reasons such as being caught by surprise or losing one's balance. Levels can be classified as smooth or rough. A smooth surface will help to reduce injuries if you do stumble. As far as floors are concerned, it is recommended that you keep them clean so they are not slippery. You should also learn how to avoid slips and trips. The best way to prevent slips and trips is by wearing proper shoes. Make sure that you buy shoes that have been designed for use in offices. These will be more comfortable than regular shoes and will help prevent accidents caused by pain or irritation. Also, make sure that your shoe laces are tied properly. This will help you if you need to change your footing quickly during meetings or presentations. Office chairs can also cause problems if they are not used correctly. If you are sitting for long periods of time, then you should get up every 30 minutes or so. This will help prevent back problems from developing from being sedentary for too long.