Since January, 1976, male patients undergoing elective unilateral inguinal herniorrhaphy have been included in a trial to see whether early return to normal activity is associated with an increased recurrence rate and to investigate economic consequences. By June, 1981, 500 patients had been reviewed at one year. 2 patients had defaulted. The first 200 patients had been examined at one year and three years. Recurrence was assessed independently, and recurrences were found of which the patient was unaware. The acceptable definition of recurrence was need for reoperation or a truss. The overall recurrence rate at one year was 3.9%. At three years no further recurrences were detected in the first 200 patients. There was no difference in the recurrence rate for those in the "early" group with 8 recurrences in a total of 246 patients and 10 recurrences in 245 patients in the control group. the median inactivity period in the "early" group was 48 days, compared with 65 days in the control. This differences of 17 days is significant (p=0.001). The self-employed "early" group returned to work in a median of 31 days. One-third of workers were losing a median of pounds 31 per week (range pounds 3- pounds 200). Patients can return to normal activity sooner after inguinal herniorrhaphy than has been advised without increasing the recurrence rate at one year and three years and with considerable monetary benefit to one-third of workers.