Older cyclists have been warned to avoid tight compression sports clothing because it can cause them to overheat and increase stress on the heart.
Athletes choose Lycra-style clothing to exercise because it is meant to regulate temperature, keep muscles warm to avoid strain, improve circulation, prevent 'tissue jiggle' and speed up recovery time.
However, a study by the University of Navarra in Spain found that such clothing offers no temperature-controlling benefits, and in older people can in fact increase heart rate.
"Recreational cyclists should be made aware of the possible adverse effects of this type of clothing," said Iker Leoz, a doctoral student.
The ability to regulate body temperature declines with age, which is why people over 60 are the most vulnerable population during heat waves and cold spells.