article_snippet.sent: Emily Quandt, who led a new study, working under John Porcari, said: 'The dramatic increases in heart rate and core temperature are alarming when you consider that there is very little movement, and therefore little cardiovascular training, going on during class.'
article_snippet.sent: Before taking part in a session each volunteer swallowed a core body temperature sensor, and was given a heart-rate monitor to wear during the class.
article_snippet.sent: Body temperature was recorded before the class started, as well as at 10-minute intervals throughout the session.
article_snippet.sent: Meanwhile heart rate was recorded every minute.
article_snippet.sent: The researchers found heart rate fluctuated throughout the class, depending on the difficulty of the pose being performed.
article_snippet.sent: But body temperature was found to steadily increase throughout the class, in both men and women.