Improvement in which factor significantly contributes to a longer lifespan?

Cardiorespiratory fitness is a crucial factor that significantly contributes to a longer lifespan because it reflects the efficiency of the cardiovascular and respiratory systems in supplying oxygen to the muscles during activity. Higher levels of cardiorespiratory fitness are associated with a lower risk of chronic diseases such as heart disease, diabetes, and certain cancers. Improved cardiorespiratory fitness also enhances the body's ability to perform everyday tasks, reduces the risk of developing mobility-related issues later in life, and supports overall health and well-being.

Additionally, numerous studies have consistently demonstrated that individuals with better cardiorespiratory fitness levels tend to live longer and healthier lives. This is primarily due to the positive impact of aerobic exercise, which improves heart health, lowers blood pressure, and contributes to better metabolic function. Thus, focusing on activities that boost cardiorespiratory fitness is a key strategy for promoting longevity.