Article in English: Muscle cramps and spasms can be caused by dehydration. While staying well hydrated won't necessarily prevent a back spasm from ever happening again, it will help your muscles remain loose. Try to drink at least 8 glasses of water a day for proper hydration. Avoid alcohol and caffeinated beverages, which are diuretics and will dry you out. Extra weight can put more pressure on your back and musculoskeletal system, increasing your chances of developing a back spasm. Make sure that your weight is right for your height. Look up your BMI or ask a doctor for a physical evaluation. If you need to lose weight, consult a registered dietitian for a diet plan that works for you. Slowly incorporate more exercise into your day once your back spasm clears up. If your diet is lacking in calcium, magnesium, or potassium, you may have more frequent muscle spasms. Even if you're working with a physical therapist or a chiropractor, your spasms may continue if you have these mineral deficiencies.  Look for whole food sources of these minerals first. Dairy products are a good source of calcium, while bananas and potatoes are good sources of potassium. If you have a mineral deficiency, reduce or eliminate your consumption of coffee and processed sugar, which impede your body's absorption of minerals. Staying active is one of the most important things you can do to prevent future back spasms. Walking is a low-impact activity and is generally easy on your back. Start with shorter walks and work up to a 20-minute walk every day.  Cycling and swimming are two other exercises that are low impact and particularly good for your back. If you have access to a gym, you might also try 15 to 20 minutes on an elliptical or stair-climbing machine. Yoga or pilates can help improve the flexibility and range of motion in your back. Try a few basic stretches before and after any activity to keep your back muscles loose.  With any stretching, only stretch as far as you can comfortably. If you feel any pain or discomfort, stop immediately. You could...

Summary in Chinese:
多喝水，以保持身体水分充足。 保持健康的体重。 从饮食中摄取身体缺乏的矿物质。 开始步行锻炼，以保持活跃。 将伸展运动纳入锻炼计划中。 坐着的时候，用靠垫支撑腰部。 背部肌肉恢复后，展开力量训练来锻炼核心肌群。