Her twin sister Inna Cherniak is visually impaired, but competes in judo and sambo both against sighted and visually impaired people.

To avoid competing against each other the sisters often split the events.

At the 2013 Summer Universiade, both sisters won medals in the 52 kg category, but Inna in sambo and Maryna in judo.

In 2016, Inna won a gold medal in judo at the 2016 Summer Paralympics, while Maryna was eliminated in her second bout at the 2016 Summer Olympics.

This biographical article related to Ukrainian judo is a stub.