The study aimed to examine the sustained impact of a 1.5-hour medical school-based physical activity (PA) module on interns’ perceived competence and importance in advising older adults about exercise. The modified Exercise and Physical Activity Competence Questionnaire (EPACQ) was administered in 2017 (CG: control group) and 2018 (IG: intervention group) two years post-course. The perceived competence of both, CG (n=23) and IG (n=18), decreased significantly over two years (p≤0.05) with no difference between the groups (p≥0.05). However, 72.2% (n=13) of the interns who attended the PA module still felt competent in advising older adults about exercise (4.21±0.66) compared to 47.8% (n=11) of the CG (3.89±0.67). The perceived importance decreased significantly in both groups (p≤0.05) with no difference between the groups (p≥0.05). However, both groups still perceived exercise for older people as important (CG:4.55±0.61; IG:4.83±0.47). Subsequently, continued professional development is likely to be a key requirement for ensuring sustainability over time.