required for ground strokes and serves. The study highlighted the fact that junior tennis players' bodies are still growing as they practice hours and hours during their teenage years, i.e. between 12 and 18. British juniors tend to spend 90% of their training time on the court while their Spanish counterparts split their time between the courts and the gym. Therefore, this research will hopefully spur junior coaches, trainers and players worldwide to modify their practice patterns and off-court strength and flexibility programs to compensate for the stress that the on-court practice places on the body, especially the back. As they say, the "hip bone's connected to the..." If you've ever had back problems, then you realize that your whole body is affected by the back pain, so take good care of it!