Objective: Patients awaiting cardiac surgery seem to benefit from exercise-based prehabilitation, but the impact on different perioperative outcomes compared with standard care is still unclear. Design: Eligible nonrandomized/randomized controlled studies investigating the impact of exercise-based prehabilitation in adults scheduled for elective cardiac surgery were searched on December 16, 2020, from electronic databases, including MEDLINE, CENTRAL, and CINAHL. The data were pooled and a meta-analysis was conducted. Results: Of 1490 abstracts, six studies (n = 665) were included into the review and meta-analysis. At postintervention interval and at postsurgery interval, 6-min-walking distance improved significantly in exercise-based prehabilitation group compared with controls (mean difference, 75.4 m; 95% confidence interval, 13.7 to 137.1 m, P = 0.02, and 30.5 m, 95% confidence interval, 8.5 to 52.6 m, P = 0.007, respectively). Length of hospital stay was significantly shorter in exercise-based prehabilitation group (mean difference, −1.00 day; 95% confidence interval, −1.78 to −0.23 day, P = 0.01). Participation in exercise-based prehabilitation revealed a significant decrease in the risk of postoperative atrial fibrillation in patients 65 yrs or younger (risk ratio, 0.34; 95% confidence interval, 0.14 to 0.83, P = 0.02). Conclusions: The participation in exercise-based prehabilitation significantly improves postintervention and postsurgery 6-min walking distance, length of hospital stay, and decreases the risk of postoperative atrial fibrillation in patients 65 yrs or younger compared with controls.

Background Literature, individual experiences and common considerations suggest that prior professional qualification can be an advantage for later career development. For instance, in Germany, professional pre-qualification has been honored by medical faculties in selection procedures for several years. However, a systematic evaluation of this relationship lacks. This scoping review summarizes existing literature and addresses the role of prior professional pre-qualifications on objective or subjective study success and the choice of a specialization. Methods The scoping review was performed oriented on the PRISMA guidelines. PsycINFO and PubMed databases were searched for relevant studies that included data of medical students with and without professional pre-qualifications. To answer the underlying research questions, this scoping review also includes studies that examine professional pre-qualifications in association with non-cognitive "soft" criteria. Results and further directions 1055 items were identified and reviewed by two independent reviewers with final 11 studies were included for this scoping review. The results of identified studies that report possible effects of prior pre-professional qualifications are inconclusive but suggest that prior professional qualifications tend not to have rather an advantage on study success. Medical school success for students with prior professional qualifications tended to be below average in the preclinical setting, and there were no differences in the clinical setting compared with students without prior professional qualifications. The influence of professional pre-qualifications has not yet been adequately studied without the moderator variable “waiting time” and “A-levels grade”. The scoping review indicates insufficient number of articles stating a co-relation of prior pre-qualifications and subjective data. Again, the results found are not sufficient to state a clear relationship between professional pre-qualifications and the choice of a specific speciality preference. However, professional pre-qualifications, both in medicine and as "practical experience in rural areas", tend to be beneficial for the choice of becoming a rural physician. Large-scale cross-sectional and longitudinal studies are needed to investigate the influence of professional pre-qualifications on different study trajectory parameters.

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