Martínez is 190 cm (6 ft 3 in) tall 68 kilograms (150 lb), born on December 3, 1997, in Santo Domingo, Distrito Nacional.

Her parents are Agripina Martínez, who also served as Dominican Republic youth and junior squads team manager,[1] and Juan Doñe (deceased 2008).

[9] Martinez played in Guatemala where she won with her U-18 squad the 2013 Youth Pan-American Cup bronze medal match 3–1 to Argentina[10] after losing 2–3 to Puerto Rico due to lack of concentration.

[22] After the gold medal, she was among the athletes included in the Dominican Government program that support the new values by the Minister of Sports, Physical Education and Recreation.

[3][24] She then played the Junior Pan-American Cup in home soil, winning the gold medal and the qualification for the 2015 FIVB U23 World Championship[25] and was awarded the second Best Middle Blocker of the tournament.

[44] Martínez senior team lost 1–3 to the United States the NORCECA Championship, ending their participation with the silver medal.

[45] Later, she was enrolled in October by the Japan Anti-Doping Agency[24] to be part of the Play True 2020 Torch Relay project,[46] where she was among many athletes aimed to leave real heritage in sport for the world and the future.