Missy Franklin is an Olympic swimmer. Her height and long limbs allow her to maximize thrust and overcome drag, two important elements in moving fast through water.
The London Aquatic Center is one of the most technologically advanced pools. Pools can generate a lot of waves when lots of swimmers are in them making it more difficult for the athletes to go fast.
Sports isn't just about physical preparation. Mental preparation is important too! A sports psychology helps athletes perform in their bets mental state.
The time keeping in the Olympics need extreme accuracy when measuring the difference between the first place winner and the other athletes. Precision and accuracy are very important to make sure the times are correct.