A handful of participants in yoga pants and tennis shoes pumped out pushups and crunches on a shaded patch of grass as George Spitzer arrived at Roxbury Park on Aug. 10. The 77-year-old joined their high-intensity interval training session without skipping a beat.
“I feel great,” the Beverly Hills resident said after about 20 minutes’ worth of sets of lunges, planks and other calisthenic exercises.
