Shares of Peloton Interactive Inc. /zigman2/quotes/208035743/composite PTON -1.43% shot up 4.6% in morning trading Tuesday, after the at-home-fitness company said it will work with UnitedHealth Group Inc. /zigman2/quotes/210453738/composite UNH +0.80% to provide UnitedHealthcare members with access to Peloton classes, at not additional cost. UnitedHealth shares tacked on 0.5%. Starting Sept. 1, as part of UnitedHealthcare's plan benefits, members can enroll with Peloton for access to Peloton's fitness classes. New and existing Peloton Members are eligible to enroll. "Many Americans may be turning to on-demand exercise options to help improve their fitness and bolster their overall well-being, and this first-of-its-kind relationship with Peloton will provide millions of our members with an important resource to help them along their paths toward a healthier lifestyle," said Philip Kaufman, chief operating officer of UnitedHealthcare Employer & Individual. Peloton shares have tumbled 18.3% year to date, while UnitedHealth's stock has climbed 17.3% and the Dow Jones Industrial Average /zigman2/quotes/210598065/realtime DJIA -0.48% has gained 11.1%.