From the website of IAAF below the preview of both 50km.
50km men
In the absence of defending champion Jared Tallent, world champion Yohann Diniz and Olympic champion Matej Toth, the men’s 50km at the IAAF World Race Walking Team Championships Taicang 2018 is wide open.
Japan has never won a gold medal in the history of this event or a medal of any colour in the 50km race. But spearheaded by world silver and Olympic bronze medallist Hirooki Arai, the Japanese team looks to have assembled their strongest possible squad with three out of their five entrants boasting a sub-3:45 lifetime best.
The 29-year-old Arai, who will turn 30 in three weeks, registered his personal best of 3:40:34 back in 2014, the third fastest time ever achieved by a Japanese athlete. He went on to establish himself as one of the best 50km race walkers in the world when he clocked 3:43:44 to finish fourth at the World Championhips in Beijing in 2015.
He cruised to a podium finish for the first time in a major international competition by earning the bronze medal in 3:41:24 at the Rio Olympic Games one year later, and proved his consistency in 2017 as he took the silver at the World Championships in London with a clocking of 3:41:17.
Arai has yet to compete in any 50km event this year, but a 20km personal best of 1:19:19 set in Kobe three months ago shows he is in good form.
Teammate Kai Kobayashi, who trailed two seconds behind Arai to take the bronze medal in London with a career best time last year, is another candidate for the individual gold in Taicang. The 25-year-old, a former 20km specialist, debuted over 50km in 2016 when he won the national title in Takahata in 3:42:08.
The Japanese quintet also includes Sitoshi Maruo, the fifth-place finisher at last year’s World Championships with a PB of 3:43:03, as well as Yuki Ito and Hayato Katsuki.
Canada’s Evan Dunfee could be the biggest threat to the Japanese. The 27-year-old set a national record of 3:41:38 to finish fourth at the 2016 Olympic Games in Rio after being overtaken by Arai in the closing stages.
Having taken team silver at 20km in Rome two years ago – Canada’s first ever medal in a men’s event at these championships – the Pan-American 20km champion is now looking to make his mark at the longer event.
Rafal Augustyn of Poland achieved his career best of 3:43:22 when taking a record third win in the Slovak city of Dudince in 2016, suggesting the 33-year-old should be considered as another serious contender in the individual rank.
Backed up by two teammates with sub-3:48 PBs at the distance, Augustyn will also be leading Poland’s charge for a medal in the team competition.
Perseus Karlstrom shattered a 29-year-old Swedish record to win in Melbourne last year in 3:44:35. In Taicang he will be shouldering the country’s hope of the first medal in the event since 1963.
The field also includes Spain’s evergreen veteran Jesus Angel Garcia, who will be making a record 13th appearance at the championships.
The 48-year-old owns the fastest PB in the field with his 3:39:54 clocking set when winning the 1997 edition of this event, then known as the IAAF World Race Walking Cup. He has collected three medals and eight top-six finishes from his previous appearances since 1993, the same year when he claimed the world title in Stuttgart.
With some of his rivals just half of his age, Garcia still maintains his competitiveness with an impressive mark of 3:58:37 just achieved in February. He will be joined on the Spanish team by Jose Ignacio Diaz, Pablo Oliva, Benjamin Sanchez and Marc Tur, who is the world leader of the year, in their pursuit of the team honours.
Hosts China have fielded five young race walkers in the event with the quickest being 23-year-old Wang Qin whose PB is 3:50:16. In spite of the lack the experience in international arenas, the home support alongside the course could be of great help in the 25-lap race, especially after three hours of race walking in humid conditions as the forecast calls for cloudy weather with occasional drizzles on Saturday.
50km women
The women’s 50km race walk at the IAAF World Race Walking Team Championships Taicang 2018 will be the deepest and highest quality competition in the young history of the event.
In Rome two years ago, women were allowed to compete in the 50km for the first time, but it was held as part of the men’s race and just one woman took part. At the IAAF World Championships London 2017, there was a standalone women’s 50km race, but as it was a late addition to the competition programme, just seven women ended up competing.
In Taicang, though, the women’s 50km has been on the programme from the outset and will be offering the same medals and prize money as the other senior disciplines. As a result, it has attracted 33 competitors.
World champion Inez Henriques will start as the favourite. The Portuguese veteran was close to retiring at the end of 2016, but reconsidered her options when the 50km became an accepted event. A few months later she established the first official world record for the distance with a clocking of 4:08:26. She improved on that to win the world title in London in a time of 4:05:56.
Henriques hasn’t contested a 50km race this year, but has shown promising form at other distances, clocking 1:29:15 for 20km and 2:45:51 for 35km. And with the added confidence that comes from winning a world title, Henriques will be tough to beat in Taicang.
China’s Yin Hang finished second to Henriques in London in an Asian record of 4:08:58. Three weeks after that performance, she set a 20km PB of 1:31:23, while more recently she recorded a 35km PB of 2:50:14 in Huangshan.
But Yin’s teammate Liang Rui, despite never having raced over 50km before, could be the biggest threat to Henriques. The 23-year-old won the 35km race in Huangshan in a personal best of 2:49:23 and has the fastest 20km PB (1:28:43) of all the Chinese 50km entrants.
Claire Tallent is another 50km debutante worth keeping an eye on. The gutsy Australian competed in the 20km at last year’s World Championships just 11 weeks after giving birth to her son Harvey. More recently she was disqualified at the Commonwealth Games while in a medal position, so she will be keen to atone for that.
European under-23 champion Klavdiia Afanaseva will also be contesting her first ever 50km. The neutral athlete has a 20km best of 1:26:47, but is untested at any distance beyond that.
Many other leading race walkers have tried out the 50km over the past 12 months. Julia Takacs won the Spanish title in 4:13:04 with Ainhoa Pinedo finishing second in 4:18:56. If both women are able to replicate that form, Spain would have a great chance of a team medal.
Ecuador could also pick up medals – individually and as a team – through Magaly Bonilla and Johana Ordonez.
Other athletes expected to be in contention include Guatemala’s Mayra Carolina Herrera, Ecuador’s Paola Perez, Nastassia Yatsevich of Belarus and USA's Kathleen Burnett.
Jon Mulkeen for the IAAF