Criterium du Dauphine leader Chris Froome has defended his use of an inhaler as Germany's Nikias Arndt won a sprint finish to claim the third stage of the race.
Giant team rider Arndt, 22, crossed ahead of Belgian Kris Boeckmans and South African teammate Reinardt Janse van Rensburg on Tuesday after the 194km run under the sun.
Team Sky rider Froome held his race lead and hit back at criticism of his use of an inhaler, which he had been filmed puffing on on his way to winning Monday's second stage.
"I have had an inhaler since childhood, I have exercise-induced asthma," said the Tour de France winner.
"It is ok. I didn't need a TUE (therapeutic use exemption).
"I don't use (the inhaler) every time I race, normally only when I have a big effort coming up.
"Given sports history, people are obviously looking for a reason. There's no reason to make a big deal out. It's completely allowed by the UCI."
Racing in searing heat, a group fall after 65km resulted in the withdrawal of France's Jerome Coppel and Italian Giacomo Nizzolo.
Arndt, a young rider more used to working for the team's lead riders John Degenkolb and Marcel Kittle in the sprint, and only turned professional last year, seized his chance in the final straight.
"I still can't believe it," said Arndt. "We don't have a real leader on the Dauphine but the team showed that we can achieve things if we work together.
"I was between eighth and tenth place on the final bend. I launched the sprint and continued the effort while I felt good. That's the way I won.
"It's the biggest victory of my career."
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