A Study of LY2495655 in Older Participants Undergoing Elective Total Hip Replacement

Inclusion Criteria: * Males with a female partner of childbearing potential should use contraception during the treatment period of the trial and up to 15 weeks after the last dose of investigational product. * Females should be of non-child bearing potential. * Elective total hip arthroplasty (eTHA) is scheduled. * Have a body mass index of \<40 kilograms per square meter (kg/m\^2) and a weight \<136.4 kilograms (kg). * Can climb at least 6 stairs with or without holding the handrail (but without human assistance), according to the participant at screening. * Can stand up from a chair and walk more than 10 meters without human assistance. * Takes at least 12 seconds to perform the Timed Up and Go (TUG) test at screening. Exclusion Criteria: * Another inpatient surgical procedure is planned in the 6 months following randomization. * Lower extremity amputation. * Lower-limb fracture within 6 months prior to screening or any major lower-limb surgery within 3 months prior to randomization. * Simultaneous bilateral eTHA. * The planned surgical procedure will preclude weight bearing for at least 4 weeks postoperatively (for instance, the planned procedure will involve extensive bone grafting). "Partial weight-bearing" and "weight-bearing as tolerated" are acceptable, but "non weight-bearing," "touch weight-bearing," or "feather weight-bearing" are exclusive. * Underlying muscle disease (for example, polymyositis or muscular dystrophy) or a history of muscle disease other than a…