A recent study into the air quality in gyms found that most left a lot to be desired. Researches from Holland and Portugal assessed the air pollutants at 11 gyms during peak hours, and found large amounts of dust, formaldehyde, and carbon dioxide.

Areas which held dedicated classes (like spin classes) were found to be the worst offenders.

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Breathing in too much of these – carbon dioxide in particular – can result in fatigue, and can even contribute to asthma or breathing issues.

Researchers believed the pollutants came from poor ventilation, cleaning products, and high levels of carbon dioxide being expelled by inhabitants of the fume parlour gym.  We hear the air outside is nice and clean…