Have FUN while boosting your cardio, improving your balance and strengthening your bones and brain.

Stanford's Laura L. Carstensen say's  "Dancing is a terrific exercise; it's fun and something most people can easily do." It pumps up your cardio system, strengthens your infrastructure (bones), works all the major muscle groups, builds stamina and coordination and improves balance and flexibility.

Best yet: Learning new steps ramps up brain power.  All forms of dancing diminish loneliness by combining the key elements of brain health :learning new things and socialization.
Get out there and have some fun line dancing--you don't need a partener.