Student Wu Yunpeng, 22, flexes his muscles at Mi Fitness after the reopening of some of Beijing's gyms following closures enforced due to the outbreak of the novel coronavirus disease (COVID-19) in Beijing, China, May 8, 2020. Picture taken May 8, 2020. REUTERS/Thomas Peter

A closed sign is seen at Muscle Beach after California issued a stay-at-home order due to coronavirus disease (COVID-19) in Santa Monica, California, U.S., March 24, 2020. REUTERS/Lucy Nicholson

Kenta Kambara, 34, flexes his upper body muscles as he gets ready to perform at 'Challenge & Move' a dance event in Tokyo, Japan, February 8, 2020. Kambara who was born with spina bifida, a disorder that paralyzed his lower body, aims to perform at the Tokyo 2020 Paralympics opening or closing ceremonies. 'These days, people use the keyword 'diversity' but not many people have experienced it themselves,' he said. 'I want people to understand by seeing me dance that it's precisely because my body is different that it is interesting. Then that will become a trigger to accept other people's differences. REUTERS/Kim Kyung-Hoon SEARCH 'WHEELCHAIR DANCER' FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Mar 4, 2020; Lawrence, Kansas, USA; Kansas Jayhawks mascot Big Jay flexing his muscles prior to the game against the TCU Horned Frogs at Allen Fieldhouse. Mandatory Credit: William Purnell-USA TODAY Sports

Zoey Tiemann who recently turned 5, and Zak Tiemann, 34, both stare into the mirror as they flex their muscles before Zoey's school's "superhero day" in Seguin, Texas, U.S., October 29, 2019. REUTERS/Callaghan O'Hare SEARCH "US MATERNAL MORTALITY" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Massage therapist Abdel Rehim Saeid performs the "fiery towel" method to ease a patient's muscle pain in Gharbia, Egypt September 4, 2019. Picture taken September 4, 2019. REUTERS/Mohamed Abd El Ghany

Massage therapist Abdel Rehim Saeid performs the "fiery towel" method to ease a patient's muscle pain in Gharbia, Egypt September 4, 2019. Picture taken September 4, 2019. REUTERS/Mohamed Abd El Ghany

Jul 5, 2019; Las Vegas, NV, USA; New Orleans Pelicans forward Zion Williamson flexes his muscle as he reacts after a dunk against the New York Knicks during an NBA Summer League game at Thomas & Mack Center. Mandatory Credit: Mark J. Rebilas-USA TODAY Sports

Miriam Gutierrez's youngest son Joaquin, 6, touches her muscles as they take their dog for a walk in Torrejon de Ardoz, outside Madrid, Spain, May 27, 2019. Picture taken May 27, 2019. REUTERS/Susana Vera

U.S. President Donald Trump hecks out the muscles on cadet Nic Ready, who won the NCAA homerun hitting contest, as the president took part in the U.S. Air Force Academy's graduation ceremony in Colorado Springs, Colorado, U.S., May 30, 2019. REUTERS/Jonathan Ernst

U.S. President Donald Trump hecks out the muscles on an cadet who won the NCAA homerun hitting contest during the U.S. Air Force Academy's graduation ceremony in Colorado Springs, Colorado, U.S., May 30, 2019. REUTERS/Jonathan Ernst

Bodybuilders flex their muscles on stage during the 16th Southeast Asia Bodybuilding and Physique Sports Championships in Yangon, Myanmar, May 18, 2019. Photo taken on May 18, 2019. REUTERS/Ann Wang

Bodybuilders show off their muscles on stage during the 16th Southeast Asia Bodybuilding and Physique Sports Championships in Yangon, Myanmar, May 18, 2019. Photo taken on May 18, 2019. REUTERS/Ann Wang

Bodybuilders flex their muscles on stage during the 16th Southeast Asia Bodybuilding and Physique Sports Championships in Yangon, Myanmar, May 18, 2019. Photo taken on May 18 2019. REUTERS/Ann Wang

Mar 27, 2019; Salt Lake City, UT, USA; Utah Jazz guard Donovan Mitchell (45) flexes his muscle in the first half against the Los Angeles Lakers at Vivint Smart Home Arena. Mandatory Credit: Jeff Swinger-USA TODAY Sports

Mar 16, 2019; Boston, MA, USA; Atlanta Hawks forward Vince Carter (15) retrieves the ball from a muscle roller during the second half against the Boston Celtics at TD Garden. Mandatory Credit: Winslow Townson-USA TODAY Sports

FILE PHOTO: An Iraqi woman walks back home to the southern city of Basra as fires rage in the distance April 3, 2003. British forces muscled into the outskirts of Iraq's second city of Basra capturing an industrial estate where Iraqi militia had spearheaded fierce resistance. REUTERS/Yannis Behrakis/File photo SEARCH "YANNIS BEHRAKIS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Feb 8, 2019; Sacramento, CA, USA; Miami Heat guard Dwyane Wade (3) flexes his muscles after scoring against the Sacramento Kings during the second quarter at Golden 1 Center. Mandatory Credit: Ed Szczepanski-USA TODAY Sports

Dec 28, 2018; Phoenix, AZ, USA; Oklahoma City Thunder forward Abdel Nader (11) flexes his muscles after a first half score against the Phoenix Suns at Talking Stick Resort Arena. Mandatory Credit: Mark J. Rebilas-USA TODAY Sports

Dec 28, 2018; Phoenix, AZ, USA; Oklahoma City Thunder forward Abdel Nader (11) flexes his muscles after a first half score against the Phoenix Suns at Talking Stick Resort Arena. Mandatory Credit: Mark J. Rebilas-USA TODAY Sports

Dec 16, 2018; Winnipeg, Manitoba, CAN; Tampa Bay Lightning forward Alex Killorn (17) out-muscles Winnipeg Jets defenseman Dmitry Kulikov (5) for the puck during the first period at Bell MTS Place. Mandatory Credit: Terrence Lee-USA TODAY Sports

Nov 20, 2018; Eugene, OR, USA; Oregon Ducks forward Kenny Wooten (14) flexes his muscles after a basket by a teammate against the Green Bay Phoenix during the second half at Matthew Knight Arena. Oregon won 83-72. Mandatory Credit: Troy Wayrynen-USA TODAY Sports

Ten month old Emiliano Cula, who has microcephaly, receives physiotherapy to try and stimulate control over his muscles in Luanda, Angola, September 6, 2018. Picture taken September 6, 2018. REUTERS/Stephen Eisenhammer

Ten month old Emiliano Cula, who has microcephaly, receives physiotherapy to try and stimulate control over his muscles in Luanda, Angola, September 6, 2018. Picture taken September 6, 2018. TO MATCH INSIGHT HEALTH-ZIKA/ REUTERS/Stephen Eisenhammer

A woman does her morning workout along the beach in Oceanside, California, U.S. August 30, 2018. REUTERS/Mike Blake

A detail of the Harley-Davidson brand name is photographed on the motorcycle of Guo Qingshan in his village outside Beijing, China, April 7, 2018. "I love the sound of the engine and the muscle of the motor. When I ride it, I feel free and proud," Guo said. However, Guo has his limits. If prices rise, Guo said he wouldn't contemplate buying another Harley. REUTERS/Thomas Peter SEARCH "TRADE PRODUCTS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Guo Qingshan poses on his Harley-Davidson motorcycle in his village outside Beijing, China, April 7, 2018. "I love the sound of the engine and the muscle of the motor. When I ride it, I feel free and proud," Guo said. However, Guo has his limits. If prices rise, Guo said he wouldn't contemplate buying another Harley. REUTERS/Thomas Peter SEARCH "TRADE PRODUCTS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY

A caretaker wearing a motion assist equipment 'Muscle Suit' carries a resident from a bed to a wheelchair at Shin-tomi nursing home in Tokyo, Japan, February 5, 2018. REUTERS/Kim Kyung-Hoon SEARCH "KYUNG-HOON ROBOTS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A participant flexes his muscles during the Mr. Olympia Amateur South America bodybuilding competition in Medellin, Colombia, February 18, 2018. REUTERS/Fredy Builes

A participant flexes his muscles during the Mr. Olympia Amateur South America bodybuilding competition in Medellin, Colombia, February 18, 2018. REUTERS/Fredy Builes

A participant flexes his muscles during the Mr. Olympia Amateur South America bodybuilding competition in Medellin, Colombia, February 18, 2018. REUTERS/Fredy Builes

A participant flexes his muscles during the Mr. Olympia Amateur South America bodybuilding competition in Medellin, Colombia, February 18, 2018. REUTERS/Fredy Builes

A participant flexes his muscles during the Mr. Olympia Amateur South America bodybuilding competition in Medellin, Colombia, February 18, 2018. REUTERS/Fredy Builes

Buddhist nuns help participants stretch their muscles during a five-day workshop teaching young women the martial art of Kung Fu, in Hemis region in Ladakh, India, August 18, 2017. REUTERS/Nita Bhalla

A wrestler displays her muscles as she performs at an all female wrestling event in London, Picture taken August 12, 2017. Britain August 12, 2017. REUTERS/Neil Hall

Floyd Mayweather Jr. of the U.S. works his abdominal muscles at the Mayweather Boxing Club in Las Vegas, Nevada, U.S., August 10, 2017. REUTERS/Las Vegas Sun/Steve Marcus

Hindu devotees display their muscles during the annual Rath Yatra, or chariot procession, in Ahmedabad, India June 25, 2017. REUTERS/Amit Dave

A robot that makes worm-like movements using soft actuators as "artificial muscles" is showcased at the National University of Singapore June 8, 2017. Picture taken June 8, 2017. REUTERS/Edgar Su

A group of about a dozen Republican governors is pushing for a new set of national health care reforms, flexing their considerable muscle in the national debate over the future of Obamacare as the U.S. Senate begins writing its own bill.

Mar 12, 2017; Indianapolis, IN, USA; Indiana Pacers guard C.J. Myles (0) flexes his muscles after center Myles Turner (33) dunks against the Miami Heat at Bankers Life Fieldhouse. Indiana defeats Miami 102-98. Mandatory Credit: Brian Spurlock-USA TODAY Sports

A participant flexes his muscles during the Mr. Olympia Amateur South America bodybuilding competition in Medellin, Colombia, February 19, 2017. REUTERS/Fredy Builes

A participant flexes his muscles during the Mr. Olympia Amateur South America bodybuilding competition in Medellin, Colombia, February 19, 2017. REUTERS/Fredy Builes

A participant flexes his muscles during the Mr. Olympia Amateur South America bodybuilding competition in Medellin, Colombia, February 18, 2017. REUTERS/Fredy Builes

Ryleah Geisner, 8, with reflective and surface EMG sensors attached to her body, walks in the Center for Gait and Movement Analysis lab at Children's Hospital Colorado in Aurora, Colorado, U.S., February 9, 2017. Ryleah has cerebral palsy, a congenital disorder of movement, muscle tone, or posture. The lab was using 3-D motion capture technology to analyze Ryleah's body movement and muscle activity while walking and that data will then be used to formulate a treatment plan for her. Picture taken on February 9, 2017. REUTERS/Rick Wilking

Ryleah Geisner, 8, with reflective and surface EMG sensors attached to her body, walks in the Center for Gait and Movement Analysis lab at Children's Hospital Colorado in Aurora, Colorado, U.S., February 9, 2017. Ryleah has cerebral palsy, a congenital disorder of movement, muscle tone, or posture. The lab was using 3-D motion capture technology to analyze Ryleah's body movement and muscle activity while walking and that data will then be used to formulate a treatment plan for her. Picture taken on February 9, 2017. REUTERS/Rick Wilking

Ryleah Geisner, 8, has reflective and surface EMG sensors attached to her body by Brittney Martz, clinical therapy aide (L) and Joanna Roybal, physical therapist (R,) before walking in the Center for Gait and Movement Analysis lab at Children's Hospital Colorado in Aurora, Colorado, U.S., February 9, 2017. Ryleah has cerebral palsy, a congenital disorder of movement, muscle tone, or posture. The lab was using 3-D motion capture technology to analyze Ryleah's body movement and muscle activity while walking and that data will then be used to formulate a treatment plan for her. Picture taken on February 9, 2017. REUTERS/Rick Wilking

Nune Karapefian (L) talks with staff after her daughter Ryleah Geisner, 8, walked with reflective and surface EMG sensors attached to her body in the Center for Gait and Movement Analysis lab at Children's Hospital Colorado in Aurora, Colorado, U.S., February 9, 2017. Ryleah has cerebral palsy, a congenital disorder of movement, muscle tone, or posture. The lab was using 3-D motion capture technology to analyze Ryleah's body movement and muscle activity while walking and that data will then be used to formulate a treatment plan for her. 2nd L is Joanna Roybal, physical therapist, 2nd R is Kayla Burnim, gait lab engineer and at right is Brittney Martz, clinical therapy aide. Picture taken on February 9, 2017. REUTERS/Rick Wilking

A computer image of the foot impressions of Ryleah Geisner, 8, is seen after she walked on a pressure sensitive floor wearing reflective and surface EMG sensors attached to her body in the Center for Gait and Movement Analysis lab at Children's Hospital Colorado in Aurora, Colorado, U.S., February 9, 2017. Ryleah has cerebral palsy, a congenital disorder of movement, muscle tone, or posture. The lab was using 3-D motion capture technology to analyze Ryleah's body movement and muscle activity while walking and that data will then be used to formulate a treatment plan for her. Picture taken on February 9, 2017. REUTERS/Rick Wilking

Ryleah Geisner, 8, with reflective and surface EMG sensors attached to her body, walks in the Center for Gait and Movement Analysis lab at Children's Hospital Colorado in Aurora, Colorado, U.S., February 9, 2017 as a computer screen (below) displays her movements. Ryleah has cerebral palsy, a congenital disorder of movement, muscle tone, or posture. The lab was using 3-D motion capture technology to analyze Ryleah's body movement and muscle activity while walking and that data will then be used to formulate a treatment plan for her. Her patient number is obscured on the screen for privacy reasons. Picture taken on February 9, 2017. REUTERS/Rick Wilking

Ryleah Geisner, 8, with reflective and surface EMG sensors attached to her body, walks in the Center for Gait and Movement Analysis lab at Children's Hospital Colorado in Aurora, Colorado, U.S., February 9, 2017 as a computer screen (below) displays her movements. Ryleah has cerebral palsy, a congenital disorder of movement, muscle tone, or posture. The lab was using 3-D motion capture technology to analyze Ryleah's body movement and muscle activity while walking and that data will then be used to formulate a treatment plan for her. Picture taken on February 9, 2017. REUTERS/Rick Wilking

Ryleah Geisner, 8, looks at a photo of herself with reflective and surface EMG sensors attached to her body with her mother Nune Karapefian (L) and Brittney Martz, clinical therapy aide (R) and Joanna Roybal, physical therapist (2nd R) before walking in the Center for Gait and Movement Analysis lab at Children's Hospital Colorado in Aurora, Colorado, U.S., February 9, 2017. Ryleah has cerebral palsy, a congenital disorder of movement, muscle tone, or posture. The lab was using 3-D motion capture technology to analyze Ryleah's body movement and muscle activity while walking and that data will then be used to formulate a treatment plan for her. Picture taken on February 9, 2017. REUTERS/Rick Wilking

Ryleah Geisner, 8, has reflective and surface EMG sensors attached to her body, before walking in the Center for Gait and Movement Analysis lab at Children's Hospital Colorado in Aurora, Colorado, U.S., February 9, 2017. Ryleah has cerebral palsy, a congenital disorder of movement, muscle tone, or posture. The lab was using 3-D motion capture technology to analyze Ryleah's body movement and muscle activity while walking and that data will then be used to formulate a treatment plan for her. Picture taken on February 9, 2017. REUTERS/Rick Wilking

Ryleah Geisner, 8, with reflective and surface EMG sensors attached to her body, walks in the Center for Gait and Movement Analysis lab at Children's Hospital Colorado in Aurora, Colorado, U.S., February 9, 2017. Ryleah has cerebral palsy, a congenital disorder of movement, muscle tone, or posture. The lab was using 3-D motion capture technology to analyze Ryleah's body movement and muscle activity while walking and that data will then be used to formulate a treatment plan for her. Picture taken on February 9, 2017. REUTERS/Rick Wilking

Ryleah Geisner, 8, looks at a computer image of her foot impressions after walking on a pressure sensitive floor wearing reflective and surface EMG sensors attached to her body in the Center for Gait and Movement Analysis lab at Children's Hospital Colorado in Aurora, Colorado, U.S., February 9, 2017. Ryleah has cerebral palsy, a congenital disorder of movement, muscle tone, or posture. The lab was using 3-D motion capture technology to analyze Ryleah's body movement and muscle activity while walking and that data will then be used to formulate a treatment plan for her. Picture taken on February 9, 2017. REUTERS/Rick Wilking

The gait and pressure of the steps of a young patient with reflective and surface EMG sensors attached to his body walks in the Center for Gait and Movement Analysis lab at Children's Hospital Colorado is seen in Aurora, Colorado, U.S., February 9, 2017. The lab uses 3-D motion capture technology and EMG sensors to analyze body movement and muscle activity while a patient walks and that data will then be used to formulate a treatment plan for the person. Identifying information has been obscured on the screen by the hospital. Picture taken on February 9, 2017. REUTERS/Rick Wilking

The gait and pressure of her steps is seen as Ryleah Geisner, 8, with reflective and surface EMG sensors attached to her body walks in the Center for Gait and Movement Analysis lab at Children's Hospital Colorado in Aurora, Colorado, U.S., February 9, 2017. Ryleah has cerebral palsy, a congenital disorder of movement, muscle tone, or posture. The lab was using 3-D motion capture technology to analyze Ryleah's body movement and muscle activity while walking and that data will then be used to formulate a treatment plan for her. Picture taken on February 9, 2017. REUTERS/Rick Wilking

Ryleah Geisner, 8, with reflective and surface EMG sensors attached to her body, walks in the Center for Gait and Movement Analysis lab at Children's Hospital Colorado in Aurora, Colorado, U.S., February 9, 2017 as a computer screen (right) displays her movements. Ryleah has cerebral palsy, a congenital disorder of movement, muscle tone, or posture. The lab was using 3-D motion capture technology to analyze Ryleah's body movement and muscle activity while walking and that data will then be used to formulate a treatment plan for her. Picture taken on February 9, 2017. REUTERS/Rick Wilking

Nune Karapefian (R) talks with staff as her daughter Ryleah Geisner, 8, looks over a toy she picked out after she walked with reflective and surface EMG sensors attached to her body in the Center for Gait and Movement Analysis lab at Children's Hospital Colorado in Aurora, Colorado, U.S., February 9, 2017. Ryleah has cerebral palsy, a congenital disorder of movement, muscle tone, or posture. The lab was using 3-D motion capture technology to analyze Ryleah's body movement and muscle activity while walking and that data will then be used to formulate a treatment plan for her. At center is Joanna Roybal, physical therapist and left is Brittney Martz, clinical therapy aide. Picture taken on February 9, 2017. REUTERS/Rick Wilking