businessman leadership speaking to employee as mentor, coaching and training in corporate company, office planning or discussion. assertive black manager talking in conversation with staff in startup - toughness stock pictures, royalty-free photos & images
mature rough looking man photographed on studio with hard lighting - toughness stock pictures, royalty-free photos & images
man standing in field carries irrigation pipe over shoulder - toughness stock pictures, royalty-free photos & images
exhausted construction worker at construction site - toughness stock pictures, royalty-free photos & images
hard working man takes break from manual labor - toughness stock pictures, royalty-free photos & images
female kickboxer training with a punching bag - toughness stock pictures, royalty-free photos & images
determination: female athlete in competition - toughness stock pictures, royalty-free photos & images
female athlete pulling rope while exercising against clear blue sky - toughness stock pictures, royalty-free photos & images
concept of hard work for businessman pushing rock up a hill - toughness stock pictures, royalty-free photos & images
close-up portrait of beautiful young woman looking in camera, shot on studio - toughness stock pictures, royalty-free photos & images
african-american man working in dark warehouse - toughness stock pictures, royalty-free photos & images
burning calories and strengthening her core with a kettlebell - toughness stock pictures, royalty-free photos & images
rancher jumps over barbed wire fence to get to road - toughness stock pictures, royalty-free photos & images
slam, strengthen and sweat your way to a killer body - toughness stock pictures, royalty-free photos & images
portrait of 3 cool kids together on blue backdrop in summer - toughness stock pictures, royalty-free photos & images
asian chinese female blue collar worker welder with protective workwear looking away smiling in workshop garage sitting on stool - toughness stock pictures, royalty-free photos & images
gangster trio: mother, adult son and his fiancée - toughness stock pictures, royalty-free photos & images
multi-ethnic workers in metal fabrication plant - toughness stock pictures, royalty-free photos & images
woman flexing muscles in front of superhero shadow - toughness stock pictures, royalty-free photos & images
tattooed handy man drilling plank and fixing new wooden table - toughness stock pictures, royalty-free photos & images
serious entrepreneur sitting at desk in office - toughness stock pictures, royalty-free photos & images
close up of caucasian mechanic's dirty hands - toughness stock pictures, royalty-free photos & images
senior woman on chaise longue, wearing hip hop accessories, portrait - toughness stock pictures, royalty-free photos & images
gritty tough cowboy during the steer wrestling competition hanging on to a land steers horns as he prepares to control him and bring him to the ground - toughness stock pictures, royalty-free photos & images
close-up beautiful woman against textured wall - toughness stock pictures, royalty-free photos & images
overweight male giving his best to compete rope climbing exercise - toughness stock pictures, royalty-free photos & images
tattoed mid aged man wearing lots of finger rings and looking in camera - toughness stock pictures, royalty-free photos & images
The HBO Series Hard Knocks crew is on hand during the Texans Training Camp at Houston Methodist Training Center, Houston, Texas.