Gravity and acceleration have clear benefits for the musculoskeletal and cardiovascular systems. According to John Cramer, greater strain on bone and muscle is a powerful stimulus to development. Strength rises by 30% in just 8 weeks. Gravity and acceleration can also be useful tools for exercise programs. As you get older, the effects of gravity are still present but they become more harmful than beneficial. That's because your bones lose mass and strength, which is why older people often need a cane or walker to keep up with walking or standing for long periods of time. Even when you're younger, if you sit for too long without getting up, you increase your risk of developing diabetes, heart disease, and other health problems associated with aging. But there are many ways that gravity helps us maintain and improve our health. First of all, it makes sure our organs don't go back into alignment after being displaced during movement- such as when raising our arms above our head- so that we can use them again without pain or difficulty. This is why it's important not to sit for long periods of time, especially if you are working at a computer screen. Sustained sitting can cause serious long-term effects on your body, from increased risk of obesity to early death. Secondly, gravity allows us to heal injuries quickly.