How many days a week you need to work out to notice a difference

Which of the follow is good way to gauge musculature endurance?

Hiv is inactivated in the laboratory after a few minutes of sitting at room temperature, but the flu virus is still active after sitting for several hours. what are the practical consequences of these findings? a) hiv can be transmitted more easily from person to person than the flu virusb) the flu virus can be transmitted more easily from person to person than hivc) this property of hiv makes it more likely to be a pandemic than the flu virusd) disinfecting surfaces is more important to reduce the spread of hiv than the flu

(05.04 lc) what is a health problem typically experienced by children and teens who smoke regularly? mouth cancer poor lung growth or function seizures stomach pain or digestion issues