As per your chart, yes, your parents would have a stable health in their old age, except for minor ailments which come with ageing, no major health issues can be seen.
Further details can be analysed and checked from their birth charts better. Your parents health would be quite stable and they could have some issues which would be controllable. Theyt could have some nagging health issues and would be under control due to their physical activity and disciplined life style.
Tula Lagna with the Lagna lord Venus posited in the sixth house in exaltation; Fourth lord Saturn posited in the eighth house conjunct Jupiter and ninth lord retrograde Mercury posited in the fourth house; rahu posited in the ninth house; Mars conjunct Moon in the second house.