International Sports Sciences Association (ISSA) Trainer Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the ISSA Trainer Exam with comprehensive quizzes that cover essential fitness concepts and knowledge. Test your understanding with multiple-choice questions, hints, and detailed explanations to help you succeed in your certification journey!

Practice this question and more.

How much greater is intradiscal pressure when seated compared to lying down?

Up to 5 times
Up to 11 times
Up to 15 times
Up to 3 times

The correct answer is: Up to 11 times

Intradiscal pressure refers to the pressure within the intervertebral discs of the spine, which can change depending on body posture. When a person is seated, particularly in a slouched position, the pressure within the discs can significantly increase compared to lying down, where the spine is in a more neutral position and relieved of the weight of the upper body. Research indicates that when seated, the intradiscal pressure can be up to 11 times greater than when lying down. This increase occurs because sitting compresses the vertebrae and intervertebral discs more than lying down, due to the vertical load and the position of the spine. This higher pressure in the seated position can contribute to discomfort and potential injury if maintained for prolonged periods. Thus, option B reflects the correct context of how intradiscal pressure differs between these two positions, providing a crucial understanding for trainers when considering the effects of posture on spinal health.