bottleneck-slow down or impede by creating an obstruction; His laziness has bottlenecked our efforts to reform the system. blockade, obstruct, stymie, stymy, embarrass, hinder, block-hinder or prevent the progress or accomplishment of; His brother blocked him at every turn.
Becoming a Lifeguard. Becoming a lifeguard does require an initial investment of time and money. Certification courses cost anywhere from $150 to $500, and take upwards of 30 hours to complete.
You must also be able to swim for a certain distance in a certain time. The American Lifeguard Association requires you swim 300 meters, but the requirements of individual employers might require you to swim farther, such as 500 meters in 10 minutes.