Why does Trump always like to shake hands firmly with world leaders? Many people think it's to show strength, but from a health perspective, grip strength actually hides more important information. Numerous studies have found that grip strength not only represents hand strength but also serves as a report card for overall muscle, nerve, and body function. The weaker the grip strength, the higher the risk of future diseases and health issues, and this signal often appears earlier than many physical examination indicators. True aging is not wrinkles on the face, but the continuous decline of bodily functions, and strength, especially grip strength, is often the earliest warning indicator.