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Lecture 9

Kinesiology 1070A/B Lecture 9: Too Much Sitting

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Western University
Kinesiology 1070A/B
Harry Prapavessis

November 4, 2016 Too Much Sitting Sedentary behaviour is an walking behaviour characterized by an energy expenditure less thanequal to 1.5 metabolic equivalents (METs) while sitting or reclining position. Much of our sitting is for work or for school Sitting and using computer for work or school Sitting in a car to get to school or work Sitting and studying Sitting in class As you age, the more light activity you do compared to heavy or intermediate, the higher the mortality rate. The more time you spend sitting and the older you get, the higher your chances of death. Health Consequences Compromises: bone mineral density, vascular health Risk factor for: obesity, some cancers Systematic Review Sedentary time in adults and the association with diabetes, CD and death. Compared greatest sedentary time with lowest Results Irrespective of physical level, those who spent the most time sitting were more than 2 times likely to have developed diabetes Almost twice as likely to die of CD One and times more likely to die over the course of the study. A telomere, the highly repetitive end segment or terminator of a DNA chain that functions as a cap, stop chromosomes from fraying, clumping together and scrambling genetic code (life span is linked to their length). Scientists have found that the less time people spend sitting, the longer their telomeres. Canadian adults spend 9.7 hours a day being sedentary. Measuring freeliving PI and PA Sensory picks up the amplitude and frequency of movement produces an electrical current of various magnitude (more intense the movement the greater the voltage) Stores the information as activity counts converted to AEEMETs based on default or determined cut points Active couch potato An individual who meets physical activity guidelines but spends most of the day being sedentary.
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