After the dog days, the heat will go away gradually and the weather will be cool. Morning and evening the weather will become cooler, you need to pay attention to strengthen the exercise and keep healthy. In order to ensure safety, people should also strengthen exercise under appropriate and reasonable conditions. People can use home exercise equipment to exercise, sandglass 30 minutes to give you a good fitness experience. Under special circumstances, people who are isolated can also use mini sand timer to help you do aerobics and other exercises indoors to relax your bodies. A small glass jar for sand can help you immerse yourself into fitness. Exercise will also keep you in a good mood and nourish your body and mind.