 Nayana Shakya akaberekwa musi waMay 10, 1982 muNepal aimbova mutambi wekushambira, uyo akasarudzika mumitambo yebreaststroke. Shakya akakodzera kumakwikwi evakadzi emamita 100 ekumhanya pachipfuvamumitambo yeOlympic yeZhizha ya2004 muAthens, nokugamuchira nzvimbo yeUniversality kubva kuFINA, munguva yekupinda ye1:34.99. Akadenha vamwe vanoshambira vanomwe mumakwikwi okutanga, kusanganisira Katerine Moreno wokuBolivia, uyo akakwikwidza pamitambo yake yeOlympic yechitatu kubvira muna 1988. Akanyora zvakanakisisa muupenyu hwake hwe1:32.92 kuti apfuure Pamela Girimbabazi weRwanda nokuda kwechinomwe chigaro nemasekondi anenge 18. Shakya akakundikana kuenda kumasemifinal, sezvo akaisa makumi mana nenomwe zvachose mumatanho ekutanga. 