Mark is a born fitness enthusiast and is currently working with fitness expert Tony Horton and Beachbody showing people how to stay in shape with the "10-Minute Trainer" program.Mark boasts a list of accomplishments in his professional career.
Utilize the input text as a context reference, choose the right relationship between 'Beachbody' and 'fitness' from the options.
Options: original broadcaster, founded by, industry, manufacturer