Concentration Photos Pictures, Images and Stock Photos

Young male athlete running on race track.

Professional woman sitting at desk and connecting with her computer, she is working from home

Slackline high in the mountains

Content young woman screaming in loudspeaker making announcement.

Young woman using cell phone to send text message on social network at night. Closeup of hands with computer laptop in background

Focused young african american businesswoman or student looking at laptop holding book learning, serious black woman working or studying with computer doing research or preparing for exam online

Boy, twelve years old, shooting blue butterfly on the wild flower on nature in summer day

Mature businesswoman smiling with employee, working together, collaboration, teamwork

Business and entrepreneurship symposium. Speaker giving a talk at business meeting. Audience in conference hall. Rear view of unrecognized participant in audience.

Businessman sitting on a windowsill at night and looking at a digital tablet, with cityscape at the background and copy space.

Subtle woman's form in an unhappy pose double exposed with a monochromatic paint splatter photographic effect

Young modern men in smart casual wear shaking hands and smiling while working in the creative office

Happy young woman sitting outdoors in yoga position

Young man boxing at the punching bag

Dog with glasses, working at laptop.

Rear view of man gesturing with hand while standing against defocused group of people sitting at the chairs in front of him

Lab technician injecting liquid into a microtiter plate

One young man is enjoying rock climbing in a climbing centre.

Tired young businessman working at home using lap top and looking Anxious

Little boy planning in classroom.

Camera, old, dark, art, close-up, fine art portrait, fun, outdoors, passion, photography themes,

A high-angle view of a businessman and a businesswoman sitting in the office building lobby and using a tablet computer

Full length portrait of a healthy muscular sportsman jumping isolated over dark background, with dumbbells in his hands. Dynamic movement. Side view

Neurons in the brain on light background

Businesswoman smiling at meeting table, listening, learning, success, happiness

Close up of young sportsman focusing before the game isolated on black background

Stock image of a beautiful young woman studying a see through computer screen & contemplating.

Young worried entrepreneur woman looking at laptop computer at home. Freelance woman programmer working from home

Dumbbells weight training, Young strong fit muscular sweaty man with big muscles strength cross workout training with dumbbells weights in the gym dark image with shadows real people

Group of fit people holding kettle bell during squatting exercise at cross training gym. Fitness girl and men lifting kettlebell during strength training exercising. Group of young people doing squat with kettle bell.

Female runner doing fitness workout. Slim woman athlete exercising on white background.

Smiling aged businesswoman in glasses looking at colleague at team meeting, happy attentive female team leader listening to new project idea, coach mentor teacher excited by interesting discussion

Side view of mixte ethnicity school kids sitting on cushions and studying over books in a library at school against bookshelfs in background

Portrait of excited dog looking at laptop screen while online shopping in pet store with owner, copy space

Close up of an African American baseball player who is ready to mash the ball.

Medical researchers looking at and examining a brain scan on a computer while working late in an office together. Lab workers analyzing and talking about results from a checkup while working overtime

One climber helping the other get to the top of a mountain

Young female in orange sweater and glasses gesturing Gyan mudra and closing eyes while meditating against blue background

Business people working at desk. Male and female professionals are sitting by windows. Colleagues are sitting in textile industry.

Depressed senior woman at home feeling sad. Elderly woman looks sadly outside the window. Depressed lonely lady standing alone and looking through the window.

Shot of a bald african businessman working on laptop computer in office. Young web designer sitting at his desk working.

Hands of Young painter working on his art inside his studio.

Goofy 1980s Computer Worker looking intently at a vintage computer screen. Retro colored and styled image with wood panelling in the background.

Concentrated female surgeon performing surgery with her team in hospital operating room. Medics during surgery in operation theater.

Young businesswoman using computer in dark office