The old saying that 'horses sweat, men perspire and women glow' is true, according to a Japanese study.
"It appears that women are at a disadvantage when they need to sweat during exercise," said research co-ordnator Yoshimitsu Inoue, in the journal Experimental Physiology.
Apparently, the male hormone testosterone is thought to enhance the sweating response. Women, therefore, need to get much hotter before breaking sweat.
But the findings are being questioned by a group of scientists at the University of Thames Valley East.
Says Prof Eugene Stepladder, head of Physiology: "I'll tell you why women don't sweat - they never bloody do anything! We've done our on research - they're just idle.
"Take my missus... she sits on her arse all day and then moans it gets wider."