Like her mother, Smutná started gymnastics as a child , but at the age of eleven decided to go cross-country skiing. Smutná had her first international appearance at the 2001 World Junior Championships in Karpacz . There her best result was the 41st place over the distance of 5 kilometers. A year later in Schonach , the classic specialist over 15 kilometers (mass start) came in 13th place. At the beginning of the 2002/03 season Smutná was accepted into the Czech national team and came to their first World Cup appearance. At the World Cup in Kiruna , she finished 65th out of 73 starters over 5 kilometers of freestyle . At the Sprint World Cup in Cogne , she just missed her first World Cup points in 33rd place. Due to a previous illness, she was unable to improve her result from the previous year at the 2003 Junior World Championships in Sollefteå . Over 5 kilometers she was 16th in the classic class and 18th in the sprint. Nevertheless she was nominated for the Nordic World Ski Championships 2003 in Val di Fiemme, Italy . There she finished over 10 kilometers classically as the worst-placed Czech athlete in 51st place. After this poor result, the then Czech coach Stanislav Frühauf accused her of sabotage and threw her out of the national team two days later.
After Smutná was only able to take part in smaller FIS races in 2004 and 2005 , she went in search of a new sporting home with her discoverer and exercise bike, Radim Duda. The two found what they were looking for in Saalfelden, Austria . After the Austrian Ski Association had also expressed interest in Smutná, she officially became an Austrian citizen in March 2006 . Since the 2006/07 season she has been part of the Austrian World Cup team. Already in November 2006 she managed to win her first World Cup points with 22nd place in the sprint in Kuusamo . One day later she was classically 17th over the distance of 10 kilometers. Her best result of the season was tenth place in the sprint in Otepää and Drammen . She finished the season with 30th place in the overall ranking of the Sprint World Cup and 41st place in the overall World Cup. At the Nordic World Ski Championships in 2007 in Sapporo , she reached the semifinals in the sprint competition and finished eleventh. In the 2007/08 season Smutná achieved her best career result to date in the sprint in Stockholm with seventh place. The 2007/08 Tour de Ski finished in 27th place. After a good start to the 2008/09 season with seventh place in the sprint in Kuusamo, she reached 23rd place in the 2008/09 Tour de Ski . In January 2009, she achieved her best World Cup placement with fourth place in the sprint competition in Vancouver, Canada . At the Nordic World Ski Championships in Liberec in 2009 , she came 24th over 10 km classic. At the end of the season she finished 35th at the World Cup finals in Falun and reached 24th place in the overall World Cup and 13th place in the Sprint World Cup. When she first participated in the 2010 Olympics in Vancouver, 11th place in the sprint was her best result. In the 2010/11 season she came in 37th place at the Nordic Opening in Kuusamo. At the Nordic World Ski Championships 2011 in Oslo , she achieved 36th place in the sprint and 15th place over 10 km classic. The following season she reached 22nd place at the Nordic Opening in Kuusamo and 33rd place in the Tour de Ski 2011/12 . In the 2012/13 season she took 14th place at the Nordic Opening and 35th place at the World Cup final in Falun. Her best placings at the Nordic World Ski Championships 2013 in Val di Fiemme were 13th place in the sprint and 11th place in the relay. The following season she came 19th at the Nordic Opening. Her best results at the 2014 Winter Olympics in Sochi were 22nd place over 10 km classic and ninth place in the team sprint. In the 2014/15 season she competed in marathons in the Ski Classics . She won the La Sgambeda prologue , the Jizera Mountains and the Marcialonga . Furthermore, she took second place at La Sgambeda, La Diagonela , the König-Ludwig-Lauf and the Birkebeinerrennet and thus achieved first place in the overall ranking. At the Nordic World Ski Championships 2015 in Falun, she came 31st in the sprint. In the following season she won the La Sgambeda and the Wasalauf . In addition, she was second at La Diagonela and Marcialonga and third at the Kaiser-Maximilian-Lauf, and at the end of the season she finished third in the overall ranking of the Ski Classics . After starting again for the Czech Republic since the beginning of the 2016/17 season, she achieved seven victories in the 2016/17 season (prologue in Pontresina , Kaiser-Maximilian-Lauf, La Diagonela, Marcialonga, Toblach-Cortina , Isergebirgslauf, Ylläs-Levi ) at the ski classics. She also came second at La Sgambeda and Årefjällsloppet , making it second overall. At the Nordic World Ski Championships 2017 in Lahti , she took 31st place over 10 km classic and 11th place with the relay. In the 2017/18 season, she achieved second place in the overall Ski Classics ranking with five second and two third places . She also won the Tjejvasan .
In the 2018/19 season, Smutná won the La Diagonela and took second place in the Jizera Mountains Run and third place in the Wasal Run , third place in the overall ranking of the Ski Classics . After finishing second at the prologue in Livigno at the beginning of the 2019/20 season, she came third at the La Diagonela and Wasalauf and thus achieved third place in the overall ranking of the Ski Classics.
Smutná has won gold 22 times and silver once at Austrian championships since 2004 . So far, she has won seven Alpine Cup races . (Status: end of season 2014/15)
successes
Victories in Worldloppet Cup races
Note: Before the 2015/16 season, the Worldloppet Cup was still called the Marathon Cup .