Home > Fitness > News 04 December 2014 Sleep apnoea may lower your aerobic fitness People with this sleep disorder take in less oxygen during exercise, small study finds. 0 Man with sleep apnoea from Shutterstock ~ take a Flexibility test » Receive Health tips » Ask Fitness Expert » Join Health24 on Facebook » 10 minute bikini-ready workout Why you need strength to run People with sleep apnoea may have lower levels of aerobic fitness, a new study suggests.Read: Family docs can treat simple sleep apnoeaSleep apnoea causes the upper airway to become blocked by soft tissue in the back of the throat during sleep. This causes pauses in breathing and other symptoms, such as gasping and snoring.Study variablesThe research included 15 adults with moderate to severe obstructive sleep apnoea and a comparison group of 19 adults with mild or no apnoea.They pedalled a stationary bike at increasingly harder resistance levels – similar to climbing up a progressively steeper hill – and kept going until exhaustion.On average, people in the sleep apnoea group scored 14 percent lower on a test that measures the maximum amount of oxygen a person can take in during intense exercise.This measurement is called VO2 max.More likely to be obesePeople with sleep apnoea are more likely to be overweight or obese, and thus less fit, the researchers noted. However, they found that people with sleep apnoea had poorer aerobic fitness than those in the comparison group, even if they were the same body size.Although this study found an association between lower oxygen intake during activity and sleep apnoea, it wasn't designed to prove that sleep apnoea was the definitive cause of this difference.Read: No apparent link between sleep apnoea and cancerResults of the study were published in the Journal of Clinical Sleep Medicine."Encouraging patients to exercise more is part of the story, but that is not the whole story," lead author Dr. Jeremy Beitler, assistant clinical professor in pulmonary and critical care medicine at the University of California, San Diego School of Medicine, said in a university news release."We believe the sleep apnoea itself causes structural changes in muscle that contributes to their difficulty exercising," he added.Read: A fat tongue may be disrupting your sleepThe researchers said measuring VO2 max may help identify sleep apnoea patients at increased risk for heart attack and stroke, which could encourage earlier treatment of sleep apnoea, which is underdiagnosed and often untreated. Read More:Can sleep apnoea affect your sex life? Sleep apnoea tied to memory problems Sleep disorders increase during pregnancy Image: Man with sleep apnoea from Shutterstock. NEXT ON HEALTH24X How Kelvin Trautman trains to be one of the best action photographers 2018-09-02 16:00 More: FitnessNews advertisement Read Health24’s Comments Policy Comment on this story 0 comments Comments have been closed for this article. Logout Comment 0 characters remaining Share on Facebook Loading comments... Other news Medical Gene therapy for sickle cell takes another step forward Fitness Here’s how this guy channelled his inner Iron Man to better his body in 8 weeks Medical 5 things you could be allergic to over the festive season Lifestyle Breast implants may increase your risk of a rare type of cancer Parenting Soft furniture no cushion against falls for young kids Fitness Kettlebell vs. barbell – the experts weigh in on these workout tools From our sponsors Dementia and Incontinence: what you need to know Tell-tale signs you need a mattress upgrade Keen to win a R2 000 voucher? Good health begins in your gastrointestinal tract Live healthier HIV/AIDS » 5 ridiculous things some people still believe about HIV/Aids It’s time to shine the light on some of the ridiculous and far-fetched perceptions about HIV that people still have. Fitness » 7 strange things that happened to my body during my first marathon Earlier this year, Health24 writer Marelize Wilke ran her first ever full marathon. She tells us about the effects it had on her body.