A man runs in the early morning light at Richmond Park in London, Britain, February 7, 2020. REUTERS/Toby Melville

A woman runs along the Isar river covered in fog in Munich, Germany, November 23, 2018. REUTERS/Andreas Gebert

A student jogs past a dormitory in Prague, Czech Republic October 10, 2018. Picture taken October 10, 2018. REUTERS/David W Cerny

People jog and ride a bicycle during sunset in Prague, Czech Republic, September 10, 2018. REUTERS/David W Cerny

A women jogs along a roadside as temperatures cool off after sunset in Oceanside, California, U.S. July 5, 2018. REUTERS/Mike Blake

A man jogs during a snowstorm in upper Manhattan in New York City, New York, U.S., March 7, 2018. REUTERS/Mike Segar

A man jogs on Memorial Drive during winter snow storm Grayson in Cambridge, Massachusetts, U.S., January 4, 2018. REUTERS/Brian Snyder

A jogger makes his way past sprinklers alight with the morning sun on a beautiful autumn day in Washington, U.S., October 20, 2017. REUTERS/Kevin Lamarque TPX IMAGES OF THE DAY

A man jogs on the Corniche as high waves hit the waterfront in Marseille, France, September 19, 2017. REUTERS/Jean-Paul Pelissier

Football Soccer - Real Madrid v Kashima Antlers - FIFA Club World Cup Final - International Stadium Yokohama - Japan , 18/12/16 Referee Janny Sikazwe and his assistants warm up Reuters / Issei Kato Livepic

Football Soccer - Real Madrid training - FIFA Club World Cup - Yokohama, Japan - 14/12/16. Real Madrid's Cristiano Ronaldo and other players attend training ahead of FIFA Club World Cup Semi-Final match against Club America. REUTERS/Issei Kato

Football Soccer - Real Madrid training - FIFA Club World Cup - Yokohama, Japan - 14/12/16. Real Madrid's Sergio Ramos attends training ahead of FIFA Club World Cup Semi-Final match against Club America. REUTERS/Issei Kato

Football Soccer - Real Madrid training - FIFA Club World Cup - Yokohama, Japan - 14/12/16 Real Madrid's Sergio Ramos attends training ahead of FIFA Club World Cup Semi-Final match against Club America. REUTERS/Issei Kato

Football Soccer - PFC Ludogorets Razgrad Training - UEFA Champions League Group A - Parc des Princes, Paris, France - 5/12/16. PFC Ludogorets Razgrad players run during the training. REUTERS/Gonzalo Fuentes

Football Soccer - PFC Ludogorets Razgrad Training - UEFA Champions League Group A - Parc des Princes, Paris, France - 5/12/16. PFC Ludogorets Razgrad players run during the training. REUTERS/Gonzalo Fuentes

Football Soccer - Paris St Germain Training - UEFA Champions League Group A - Centre Ooredoo, Saint Germain-en-Laye, near Paris, France - 5/12/16. Paris Saint-Germain's Edinson Cavani, Hatem Ben Arfa and Grzegorz Krychowiak during the training. REUTERS/Gonzalo Fuentes

Britain Football Soccer - Feyenoord Training - Old Trafford, Manchester, England - 23/11/16 Feyenoord's Brad Jones during training Action Images via Reuters / Carl Recine Livepic EDITORIAL USE ONLY.

Football Soccer - Monaco training - UEFA Champions League - La Turbie, France - 21/11/16 - Monaco's Radamel Falcao (C) during a training ahead of their Champions League match against Tottenham. REUTERS/Eric Gaillard

Football Soccer - France Training - France v Sweden - 2018 World Cup Qualifying European Zone - Group A - Stade de France, Saint-Denis near Paris, France - 10/11/16. France's team is seen during the training. REUTERS/Gonzalo Fuentes

Football Soccer - France Training - France v Sweden - 2018 World Cup Qualifying European Zone - Group A - Stade de France, Saint-Denis near Paris, France - 10/11/16. France's Patrice Evra is seen during the training. REUTERS/Gonzalo Fuentes

Football Soccer - France Training - France v Sweden - 2018 World Cup Qualifying European Zone - Group A - Stade de France, Saint-Denis near Paris, France - 10/11/16. France's Patrice Evra is seen during the training. REUTERS/Gonzalo Fuentes

Football Soccer - Sweden Training - France v Sweden - 2018 World Cup Qualifying European Zone - Group A - Stade de France, Saint-Denis near Paris, France - 10/11/16. Sweden's team during a training. REUTERS/Gonzalo Fuentes

Football Soccer - Sweden Training - France v Sweden - 2018 World Cup Qualifying European Zone - Group A - Stade de France, Saint-Denis near Paris, France - 10/11/16. Sweden's team during a training. REUTERS/Gonzalo Fuentes

Football Soccer - Sweden Training - France v Sweden - 2018 World Cup Qualifying European Zone - Group A - Stade de France, Saint-Denis near Paris, France - 10/11/16. Sweden's team during a training. REUTERS/Gonzalo Fuentes

Britain Soccer Football - England Training - St. George’s Park, Burton upon Trent - 10/11/16 England's Joe Hart during training Action Images via Reuters / Carl Recine Livepic EDITORIAL USE ONLY.

Britain Soccer Football - England Training - St. George’s Park, Burton upon Trent - 10/11/16 England's Joe Hart during training Action Images via Reuters / Carl Recine Livepic EDITORIAL USE ONLY.

Britain Soccer Football - England Training - St. George’s Park, Burton upon Trent - 10/11/16 England's Joe Hart during training Action Images via Reuters / Carl Recine Livepic EDITORIAL USE ONLY.

Britain Soccer Football - England Training - St. George’s Park, Burton upon Trent - 10/11/16 England's Joe Hart during training Action Images via Reuters / Carl Recine Livepic EDITORIAL USE ONLY.

Football Soccer - Paraguay's national team training - World Cup 2018 Qualifier - Ypane, Paraguay - 9/11/16. Paraguay's national soccer team players attend a training session in preparation for a qualifying match against Peru. REUTERS/Jorge Adorno

Football Soccer - Austria's national soccer team training - World Cup 2018 Qualifiers - Maria Enzersdorf, Austria - 9/11/16. Austria's players attend a training session. REUTERS/Leonhard Foeger

Football Soccer - Club Brugge training - UEFA Champions League - Jan Breydel stadium, Bruges, Belgium - 17/10/16. Club Brugge players attend a training session. REUTERS/Francois Lenoir

Football Soccer - Moldova v Republic of Ireland - 2018 World Cup Qualifying European Zone - Group D - Stadionul Zimbru, Chisinau, Moldova - 9/10/16
Republic of Ireland's James McCarthy, Paul McShane and David Meyler warm up before the match
Reuters / Gleb Garanich
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Football Soccer Britain - Wales Training - Cardiff City Stadium, Cardiff, Wales - 8/10/16
Wales' Gareth Bale during training
Action Images via Reuters / Andrew Couldridge
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Football Soccer Britain - Wales Training - Cardiff City Stadium, Cardiff, Wales - 8/10/16
Wales' Gareth Bale and Chris Gunter during training
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Football Soccer Britain - Wales Training - Cardiff City Stadium, Cardiff, Wales - 8/10/16
Wales' Ben Davies, Neil Taylor, Chris Gunter, Joe Ledley and Gareth Bale during training
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Football Soccer - Austria v Wales - 2018 World Cup Qualifying European Zone - Group D - Ernst Happel Stadium, Vienna, Austria - 6/10/16
Wales' Gareth Bale warms up before the match
Reuters / Leonhard Foeger
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Football Soccer Britain - Wales Training - The Vale Resort, Hensol, Vale of Glamorgan, Wales - 5/10/16
Wales' Sam Vokes, James Chester, Gareth Bale, Ashley Williams, Joe Ledley, David Cotterill and Andy King during training
Action Images via Reuters / Andrew Couldridge
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Football Soccer Britain - Wales Training - The Vale Resort, Hensol, Vale of Glamorgan, Wales - 5/10/16
Wales' players during training
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Football Soccer Britain - Wales Training - The Vale Resort, Hensol, Vale of Glamorgan, Wales - 5/10/16
Wales' players during training
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France's defender Layvin Kurzawa arrives to attend a training session at the French national football team training base in Clairefontaine, France, October 3, 2016, as part of their preparation for the upcoming 2018 World Cup Group A qualifier match against Bulgaria. REUTERS/Benoit Tessier

France's defender Aymeric Laporte attends a training session at the French national football team training base in Clairefontaine, France, October 3, 2016, as part of their preparation for the upcoming 2018 World Cup Group A qualifier match against Bulgaria. REUTERS/Benoit Tessier

Britain Football Soccer - Tottenham Hotspur v Gillingham - EFL Cup Third Round - White Hart Lane - 21/9/16
Gillingham players warm up before the match
Reuters / Neil Hall
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Britain Football Soccer - Wales v Moldova - 2018 World Cup Qualifying European Zone - Group D - Cardiff City Stadium, Cardiff, Wales - 5/9/16
Wales' Chris Gunter, Gareth Bale and Neil Taylor during the warm up
Action Images via Reuters / John Sibley
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Britain Football Soccer - Wales v Moldova - 2018 World Cup Qualifying European Zone - Group D - Cardiff City Stadium, Cardiff, Wales - 5/9/16
Wales' Chris Gunter and Gareth Bale during the warm up
Action Images via Reuters / John Sibley
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Britain Football Soccer - England Under 21 Training - St George's Park - 5/9/16
England's Marcus Rashford during training
Mandatory Credit: Action Images / Ed Sykes
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Football Soccer - Bolivia's training - World Cup 2018 Qualifiers - La Paz, Bolivia 30/8/16. Members of Bolivia's national soccer team jog during a training session ahead of their qualifying match against Peru. REUTERS/David Mercado

A woman jogs on Barra da Tijuca beach ahead of the Rio 2016 Olympic games in Rio de Janeiro, Brazil, July 27, 2016. REUTERS/Sergio Moraes

Britain Cricket - England Nets - Lord's - 13/7/16
England's Joe Root during nets
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Thailand's badminton player Ratchanok Intanon, who hopes to win gold at the Rio Olympics, jogs during an afternoon training session at a gym in Bangkok, Thailand, June 22, 2016. Picture taken June 22, 2016. REUTERS/Athit Perawongmetha

Football Soccer - Euro 2016 - Germany Training - Stade Camille Fournier, Evian-Les-Bains, France - 5/7/16 - Germany's Mesut Oezil, Lukas Podolski, Thomas Mueller and Jonas Hector during training. REUTERS/Denis Balibouse

Football Soccer - Euro 2016 - Germany Training - Stade Camille Fournier, Evian-Les-Bains, France - 5/7/16 - Germany's players during training. REUTERS/Denis Balibouse

Football Soccer - Euro 2016 - Germany Training - Stade Camille Fournier, Evian-Les-Bains, France - 5/7/16 - Germany's players during training. REUTERS/Denis Balibouse

Football Soccer - Euro 2016 - Portugal Training - Centre National de Rugby, Marcoussis, France - 4/7/16 - Portugal's Cristiano Ronaldo during training. REUTERS/John Sibley

Football Soccer - Euro 2016 - Portugal Training - Centre National de Rugby, Marcoussis, France - 4/7/16 - Portugal's Cristiano Ronaldo during training. REUTERS/John Sibley

Football Soccer - Poland Training - EURO 2016 - Olympic Marseille Training Ground - Marseille, France - 29/6/16 Poland's Robert Lewandowski during training REUTERS/Kai Pfaffenbach

Football Soccer - Poland Training - EURO 2016 - Olympic Marseille Training Ground - Marseille, France - 29/6/16 Poland's goalkeeper Lukasz Fabianski during training REUTERS/Kai Pfaffenbach

Football Soccer - Poland Training - EURO 2016 - Olympic Marseille Training Ground - Marseille, France - 29/6/16 Poland's Robert Lewandowski during training REUTERS/Kai Pfaffenbach

Football Soccer - Poland Training - EURO 2016 - Olympic Marseille Training Ground - Marseille, France - 29/6/16 Poland's Robert Lewandowski during training REUTERS/Kai Pfaffenbach

Football Soccer - Euro 2016 - Albania Training - Stade Velodrome, Marseille, France - 14/6/16 - Albania's players during training. REUTERS/Yves Herman

Football Soccer - Euro 2016 - Albania Training - Stade Velodrome, Marseille, France - 14/6/16 - Albania's players during training. REUTERS/Yves Herman