Surgeon-specific outcome data are now published for most surgical specialties in the United Kingdom. There are concerns that this initiative has had a negative impact on training. The primary objective of this study was to assess whether training activity has changed since the publication of surgeon-specific outcomes in cardiac surgery. Prospectively collected data for cardiac surgical procedures performed at a single center from 2004 to 2016 were analyzed. The cohort was split into two halves according to operation date. Multivariable logistic regression was used to assess whether training activity had increased from the first to the second part of the study and to identify whether trainee first operator was associated with adverse outcomes. A total of 14,054 cardiac surgical procedures were included, of which 1,777 (12.6%) had a trainee as first operator. Despite an increase in the risk profile of patients undergoing surgical procedures, the proportion of cases performed by trainees increased from 11.7% (786 of 6,708) in the first half of the study to 13.5% (991 of 7,346) in the second half of the study (p= 0.002). This effect remained after adjustment for confounding variables. Trainee first operator was not significantly associated with an increased risk of any adverse short-term outcome. Since surgeon-specific outcome publication began in United Kingdom, cardiac surgical training activity has significantly increased at the study center despite an increase in the risk profile of patients. This study demonstrates that it is possible to maintain or even increase training activity with good outcomes in the era of surgeon-specific outcome publication.