Devon and hunter have been going to the local skateboard park for several weeks and learning new tricks on their skateboards. some of the older skaters at the park have been giving them tips to be successful. to increase the amount of time devon stays on the skateboard he should follow the tips given on: anaerobic fitness balance power reaction time

i think it's the first one because doctors aren't the ones who get rid of the old needles. most of them time it's not even doctors who give you shots, it's nurses.

during longer space exploration trips, crewmembers may develop vision impairment risks and short-term cardiac atrophy or a decrease in the size, strength, weight, and activity of the heart during space flight because they can experience microgravity. in addition, the long-term medical condition is loss of bone mineral density and radiation exposure.