Malden will open the refurbished Macdonald Stadium running track to the public throughout the fall and winter to encourage physical fitness. The track, made of a rubber-based compound that is softer than asphalt and concrete, relieves stress on runners’ and walkers’ joints. Currently the track is open Monday through Friday from 6:30 a.m. to 6:30 p.m., and on Saturdays from 8 a.m. to noon. Starting Nov. 26, the track will be open on weekdays from 6:30 a.m. to 4 p.m. and will be closed on weekends.