Yes, drinking a little before meals can reduce appetite. Proper intake of water can also accelerate metabolism, which is good for losing weight. But drinking too much can lead to water poisoning. Adults who don't do much exercise need 2-3 liters of water every day. Don't just drink pure water.

However, it is better to exercise three or four times a week. Choose light weight and do it for about 30 minutes. Doing aerobic training for 30 minutes is better than simply doing 1 hour strength training or aerobic training. Eat in moderation, eat less and eat more, and be full. Because eating too little, the metabolism will decrease, which is not conducive to losing weight. The daily calorie intake of adults shall not be lower than 128.