First, read the English article below.

Do a slower version of your exercise before and afterwards. Walk at a brisk pace before running. If you are strength conditioning, use a moderate form of cardio as a warm up and cool down. You might jump rope or use the elliptical to get loose and to get the blood flowing. Warming up literally helps to warm your muscles in preparation. Cooling down allows your body temperature to return to resting levels . Using poor body positioning when you move can contribute to soreness once you’re finished. If you are biking, keep your chest elevated and your shoulders back. If you are running, make sure that you are not hunching your neck. If you are weightlifting, it’s a good idea to keep your core engaged.  The way that you hold your body will vary depending on the sport or activity that you are performing. Have a coach or personal trainer check your form and technique to ensure you’re moving the correct way. If you are doing a physical activity and start to feel pain, then it’s time to take a break or stop entirely for the day. It’s also important to build up any training regimen slowly to avoid overtaxing your body early on. Signals of a worn-out muscle system can include sharp pains, cramps, or even loss of muscle power.  For example, if you are starting to work out again after an injury, don’t go back to your prior intensity or time. Instead, build back up to that level over time. 

Now, please write a short abstract for it in Chinese. Abstract:
做5到10分钟的热身运动和放松运动。 锻炼时，检查自己的身体姿势。 在身体负担过重或感到疼痛前停止运动。