| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Female | |
| Full name | Ritva Helinä•Laihorinne-Marjamaa | |
| Used name | Helinä•Laihorinne-Marjamaa | |
| Nick/petnames | Mimmi | |
| Born | 5 June 1956 in Evijärvi, Etelä-Pohjanmaa |  FIN |
| Measurements | 168 cm / 58 kg | |
| Affiliations | Kauhajoen Karhu — Kauhajoki, Etelä-Pohjanmaa | FIN |
| NOC | Finland | FIN |
Personal Bests: 100 – 11.13 (1983); 200 – 22.86 (1983).
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1980 Summer Olympics | Athletics | FIN |
Helinä Laihorinne | |||
| 100 metres, Women (Olympic) | 5 h1 r1/4 | |||||
| 200 metres, Women (Olympic) | ||||||
| 4 × 400 metres Relay, Women (Olympic) | Finland | |||||
| 1984 Summer Olympics | Athletics | FIN |
Helinä Marjamaa | |||
| 100 metres, Women (Olympic) | 5 h1 r3/4 | |||||
| 200 metres, Women (Olympic) | 6 h1 r3/4 |
