Some par­ents tell bed­time sto­ries to their chil­dren. As a young mother, Ketty Rosen­feld danced with her kids before tucking them in for the night.

We shut off the lights, turned on a flash­light and danced to Frank Sinatra, Nat King Cole and The Rolling Stones,” Rosen­feld recalled. She impressed her chil­dren with her skills: “Mommy’s the best,” they would exclaim in unison.

The director of Northeastern’s inter­na­tional coop­er­a­tive edu­ca­tion pro­gram grew up in Indonesia, where she learned how to dance bhangra, salsa and merengue.

As Rosen­feld put it, “I cannot live without dancing.” Music, she added, “is the heart­beat of entertainment.”

For the last two years, Rosen­feld has taught a Latin dance-​​inspired fit­ness pro­gram called Zumba, whose chore­og­raphy incor­po­rates hip-​​hop, salsa and merengue dance moves.

She cur­rently teaches the pro­gram at the Jewish Com­mu­nity Center in Newton, Mass., and at the Beacon Hill Ath­letic Club in Brighton, Mass. Last year, Rosen­feld taught North­eastern stu­dents in the Marino Center.

Zumba fanatics flock to Rosenfeld’s work­outs. Her energy, grace and unbri­dled enthu­siasm for exer­cising and burning calo­ries are infectious.

One woman cred­ited Rosenfeld’s Zumba workout for alle­vi­ating her depres­sion. A mar­ried couple rekin­dled their com­pan­ion­ship by busting a move. “They were always looking to do some­thing together, and this was it,” Rosen­feld said.

I love all of my stu­dents,” she added.

In the throes of a dance rou­tine, Rosen­feld is prone to making high-​​pitched whirring noises and scur­rying from one end of the studio to the other. “I have an incred­ible amount of energy,” said Rosen­feld, a Boston Marathon runner who rides her bike to work every day. “I need to exercise.”

She finds par­al­lels between teaching Zumba and helping North­eastern stu­dents suc­ceed on inter­na­tional co-​​op. “You have to find a way to get people out of their com­fort zones,” she explained. “You have to have fun and find the pos­i­tive side to everything.”