Exercise controls weight
Exercise can help prevent excess weight gain or help you keep off lost weight. When you take part in physical activity, you burn calories. The more intense the activity, the more calories you burn.

Regular trips to the gym are great, but don't worry if you can't find a large chunk of time to exercise every day. Any amount of activity is better than none. To gain the benefits of exercise, just get more active throughout your day. For example, take the stairs instead of the elevator or rev up your household chores. Consistency is key.

2. Exercise combats health conditions and diseases
Worried about heart disease? Hoping to prevent high blood pressure? No matter what your current weight is, being active boosts high-density lipoprotein (HDL) cholesterol, the "good" cholesterol, and it decreases unhealthy triglycerides. This one-two punch keeps your blood flowing smoothly, which lowers your risk of heart and blood vessel, called cardiovascular, diseases.

Regular exercise helps prevent or manage many health problems and concerns, including:

Stroke.
Metabolic syndrome.
High blood pressure.
Type 2 diabetes.
Depression.
Anxiety.
Many types of cancer.
Arthritis.
Falls.
It also can help improve cognitive function and helps lower the risk of death from all causes.

Population, in human biology, the whole number of inhabitants occupying an area (such as a country or the world) and continually being modified by increases (births and immigrations) and losses (deaths and emigrations). As with any biological population, the size of a human population is limited by the supply of food, the effect of diseases, and other environmental factors. Human populations are further affected by social customs governing reproduction and by the technological developments, especially in medicine and public health, that have reduced mortality and extended the life span

In 2017, while red-flagging the concern of biological warfare at an international security conference, philanthropist businessman Bill Gates underlined how a respiratory-spread pathogen could kill 30 million people in less than a year. Coronavirus has not emanated from a terrorist module, but it seems to have the potential to become exactly the global epidemic Gates was warning against. Within three months of its outbreak, coronavirus has already claimed over 3,200 lives and has spread to over 93,000 cases across 70 countries. Outside China which has borne most of the disease brunt, Iran has reported 92 deaths while Italy has reported 79. With WHO declaring it a public health emergency of international concern, the disease has also made its way to the US amid much criticism of the Trump administration’s initial handling of the health threat.