People practise standup paddleboard yoga, or SUP yoga, on the Adriatic coast in Verudela, Croatia July 10, 2017. REUTERS/Antonio Bronic TPX IMAGES OF THE DAY 

Grime artist Luciferian, MC of The Collective, poses for a photograph in woods close to his house in Cobham, Surrey, Britain, September 23, 2016. Luciferian said he loves to go to the woods to relax, keep fit and think about music. REUTERS/Paul Hackett SEARCH "GRIME LONDON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. ? 

A participant stretches on the beach before the start of an annual two-mile sea swimming competition in Colombo, Sri Lanka March 5, 2017. REUTERS/Dinuka Liyanawatte 

Iceberg lettuces are seen at a lettuce plantation in Pulpi, near Almeria, southeast Spain February 13, 2017. Picture taken February 13, 2017. REUTERS/Jon Nazca 

A worker poses for a photograph holding an iceberg lettuce in a lettuce plantation in Pulpi, near Almeria, southeast Spain February 13, 2017. Picture taken February 13, 2017. REUTERS/Jon Nazca 

Participants perform Otonamaki, which translates as "adult wrapping", a new form of therapy where people are wrapped in large swaddling cloth to alleviate posture problems and stiffness, at a session in Asaka, Saitama prefecture, Japan, February 4, 2017. REUTERS/Toru Hanai TPX IMAGES OF THE DAY 

Penelope Ghartey does a one-handed push up at his home in Brooklyn, New York, U.S., December 13, 2016. Picture taken December 13, 2016. REUTERS/Brendan McDermid 

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 

Britain Football Soccer - Everton v Arsenal - Premier League - Goodison Park - 13/12/16 Everton's Romelu Lukaku warms up before the match Reuters / Phil Noble Livepic EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 45 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details. 

Britain Football Soccer - Everton v Arsenal - Premier League - Goodison Park - 13/12/16 Everton's Romelu Lukaku warms up before the match Reuters / Phil Noble Livepic EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 45 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details. 

Britain Football Soccer - AFC Bournemouth v Leicester City - Premier League - Vitality Stadium - 13/12/16 Bournemouth's Harry Arter warms up before the match Reuters / Stefan Wermuth Livepic EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 45 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details. 

Britain Football Soccer - AFC Bournemouth v Leicester City - Premier League - Vitality Stadium - 13/12/16 Bournemouth's Harry Arter warms up before the match Reuters / Stefan Wermuth Livepic EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 45 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details. 

Britain Boxing - James DeGale Media Work-Out - Stonebridge ABC, London - 13/12/16 James Degale poses after his workout Action Images via Reuters / Andrew Couldridge Livepic EDITORIAL USE ONLY. 

Britain Boxing - James DeGale Media Work-Out - Stonebridge ABC, London - 13/12/16 James Degale poses after his workout Action Images via Reuters / Andrew Couldridge Livepic EDITORIAL USE ONLY. 

Britain Boxing - James DeGale Media Work-Out - Stonebridge ABC, London - 13/12/16 James DeGale during his work-out Action Images via Reuters / Andrew Couldridge Livepic EDITORIAL USE ONLY. 

Britain Boxing - James DeGale Media Work-Out - Stonebridge ABC, London - 13/12/16 James DeGale during his work-out Action Images via Reuters / Andrew Couldridge Livepic EDITORIAL USE ONLY. 

Britain Boxing - James DeGale Media Work-Out - Stonebridge ABC, London - 13/12/16 James DeGale during his work-out Action Images via Reuters / Andrew Couldridge Livepic EDITORIAL USE ONLY. 

Britain Boxing - James DeGale Media Work-Out - Stonebridge ABC, London - 13/12/16 James DeGale during his work-out Action Images via Reuters / Andrew Couldridge Livepic EDITORIAL USE ONLY. 

Britain Boxing - James DeGale Media Work-Out - Stonebridge ABC, London - 13/12/16 James DeGale poses during his work-out Action Images via Reuters / Andrew Couldridge Livepic EDITORIAL USE ONLY. 

Britain Boxing - James DeGale Media Work-Out - Stonebridge ABC, London - 13/12/16 James DeGale during his work-out Action Images via Reuters / Andrew Couldridge Livepic EDITORIAL USE ONLY. 

Britain Boxing - James DeGale Media Work-Out - Stonebridge ABC, London - 13/12/16 James DeGale during his work-out Action Images via Reuters / Andrew Couldridge Livepic EDITORIAL USE ONLY. 

Britain Boxing - James DeGale Media Work-Out - Stonebridge ABC, London - 13/12/16 James DeGale during his work-out Action Images via Reuters / Andrew Couldridge Livepic EDITORIAL USE ONLY. 

Britain Boxing - James DeGale Media Work-Out - Stonebridge ABC, London - 13/12/16 James DeGale during his work-out Action Images via Reuters / Andrew Couldridge Livepic EDITORIAL USE ONLY. 

Britain Boxing - James DeGale Media Work-Out - Stonebridge ABC, London - 13/12/16 James DeGale during his work-out Action Images via Reuters / Andrew Couldridge Livepic EDITORIAL USE ONLY. 

Britain Boxing - James DeGale Media Work-Out - Stonebridge ABC, London - 13/12/16 James DeGale during his work-out Action Images via Reuters / Andrew Couldridge Livepic EDITORIAL USE ONLY. 

Britain Boxing - James DeGale Media Work-Out - Stonebridge ABC, London - 13/12/16 James DeGale during his work-out Action Images via Reuters / Andrew Couldridge Livepic EDITORIAL USE ONLY. 

Britain Boxing - James DeGale Media Work-Out - Stonebridge ABC, London - 13/12/16 James DeGale during his work-out Action Images via Reuters / Andrew Couldridge Livepic EDITORIAL USE ONLY. 

People skate at the Tower of London ice rink in London, Britain December 11, 2016. REUTERS/Toby Melville 

A winter swimmer swims after breaking the ice on a frozen lake at a park in Shenyang, China, December 9, 2016. REUTERS/Sheng Li TPX IMAGES OF THE DAY 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Anthony Joshua takes photos with fans after the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Anthony Joshua during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Anthony Joshua during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Anthony Joshua during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Anthony Joshua during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Anthony Joshua during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Anthony Joshua during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Anthony Joshua during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Anthony Joshua during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Anthony Joshua during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Anthony Joshua during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Anthony Joshua during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Anthony Joshua during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Scott Quigg during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Dillian Whyte during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Dillian Whyte during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Dillian Whyte during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Callum Smith during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Callum Smith during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Callum Smith during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Luis Ortiz during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Luis Ortiz during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Luis Ortiz during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Luis Concepcion during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Luis Concepcion during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Luis Concepcion during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Luis Concepcion during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY. 

Britain Boxing - Anthony Joshua & Eric Molina Public Work-Outs - Manchester Arena - 6/12/16 Luis Concepcion during the workout Action Images via Reuters / Ed Sykes Livepic EDITORIAL USE ONLY.