Teenagers not getting enough sleep can cause low mood, behavioural problems ______ an inability to concentrate.

As according ______ research, young people are biologically driven to require more sleep.

Extreme sports first ________ popular in the 1990's and appeals mostly to the younger generation.

The X Games are held in the summer and winter, in order to cater _______ all the major extreme sports.

Studies show that teenagers actually need 9.25 hours of sleep in ______ to function well, physically and psychologically.

The X games are held annually, ________ in the summer and winter.

The effects of insufficient sleep ______ teenagers can be quite dramatic, even more so than in adults.

Extreme sports are sports _________ are known to be of high risk or speed, such as snowboarding, skydiving or freestyle skiing.

The competition awards medals and a cash prize to those ________ are successful.

A recent report revealed that teenagers not sleeping enough was, ______ fact, becoming an increasingly significant issue.

The report also highlighted that the number of teenagers suffering from sleep-related issues ______ increased dramatically over the last ten years.

The reasons ______ the number of teenagers suffering from lack of sleep are varied, and include some of the following: poor habits, poor diet, stress, anxiety and a lack of guidance.

Extreme sports are all about _______ thrill of it.