Amy Martinez

Have you heard of the term sled head?

We'll talk about the risks to the brain athletes face when competing in high-speed sledding events.

I'm Ian Martinez, and this is Up First Winter Games.

It's Monday, February 16th, and here's what you need to know.

Norway's Johannes Klabo won his fourth gold medal these games, making him the most decorated winner Olympian of all time.

The cross-country star now has a total of nine career Olympic gold medals, and his win on Sunday cements his place as one of the most dominant skiers the sport has ever seen.

And get this, he may not be done yet.

The 29-year-old still has two more events where he's the favorite for the top spot.

Speaking of gold medals and history, Brazilian skier Lucas Pinheiro Braten took home gold in the men's giant slalom, marking the first winner Olympic medal ever for South America.

And the Olympic drought continues for Michaela Schifrin as she failed to make the podium in the women's giant slalom on Sunday, finishing 11th.

Italy's Federica Brighioni took home her second gold of the Games.

NPR's Brian Mann was there and has more on Schifrin's performance and what she said after the race.

Normally, curling has a reputation for being one of the more, shall we say, polite sports at the Olympics.

But now an alleged cheating scandal is rocking the Olympic curling world and things have gotten pretty heated between the men's Canadian and Swedish teams.

NPR's Ping Huang has more on to touch or not to touch.

What is happening, Ping?

Okay, yeah, so why does that matter?

Why does this double touch matter so much?

Okay, so what's been Canada's response?

So it's been a few days.