---Simple ( non- rigorous), but very effective exercises for senior people(50+).
--Can be perfomed indoors too.
-- Very effective to keep all body joints flexible & active.
--Ending with basic pranayam is good as lungs get energised.
--Not necessary, but one's stamina permits, 1-2 km running/jogging/walking with a few Push-Ups & Bend-stretch will be added benefit to basic health/fitness.