Answer: Aerobic Heart Rate Zone
This is the zone to aim for when training for endurance. It spurs your body to improve your circulatory system by building new blood vessels and increases your heart and lung capacity. Aiming for 20 to 60 minutes in this zone is believed to give the best fitness training benefits.
Answer:
Secondhand smoke among children causes a myriad of problems with the respiratory system.
Explanation:
Pregnant mothers or young children that are exposed to secondhand smoke are more likely to suffer from SIDS (Sudden Infant Death Syndrome), babies could be born with low birth weights and/or underdeveloped lungs, children can suffer from acute respiratory infections and/or asthma, children can also suffer from increased ear infections as well.
It is flexion. When the angle between the bones decreases.