Pedzisa mutsara unotevera: Mutambo wake wokutanga wemitambo yevakaremara waiva pazera remakore 11, achikunda menduru dzendarama nomwe mumitambo inoverengeka. Muna 2008, pazera remakore gumi nemana, akasarudzwa kuti amiririre Great Britain paMitambo yeParalympic yeZhizha muBeijing, achipedza 11th muvakadzi F42-46 javelin. Aive nhengo yechidiki ye2008 Great Britain timu. Gore rakatevera akahwina menduru dzake dzekutanga dzakakosha paakakwikwidza mu2009 IWAS World Junior Championships muSwitzerland, kuhwina sirivheri muF46 dhisiki uye bronze muF46 javelin. 2009 raiva gore rokupedzisira Arnold akakwikwidza pamakwikwi mudhisiki, achiisa pfungwa dzake chose chose pamuromo. Gore rakatevera akavandudza menduru yake yemapfumo paakatora sirivheri pa2010 IWAS World Junior Championship ndokuzotora goridhe pa2011 Championship yakaitirwa kuDubai. Gore ra2011 rakaona Arnold achikwidza kusvika padanho repamusoro achimiririra Britain ku
IPC Athletics World Championships muNew Zealand; akapedza wechitatu muF46 javelin, achitora menduru yebronze. Muna 2012, akahwina menduru yesirivha kuIPC Championships. Zvakanakisisa zvake paF46 javelin zvakanyorwa pa35.88m munaJune 2012 paWelsh Championships muCardiff, achimuisa senhamba yepasi rose yechipiri mumutambo wake kuenda ku2012 Paralympics. Nhoroondo yaArnold yakawedzerwa pa 2012 Summer Paralympics muLondon nekukanda 36.27m. Musi wa22 Chikunguru 2013, Arnold akakwikwidza muIPC Athletics World Championships muLyon. Akakunda ndarama nekukanda kwakahwina 37.45m, achiwedzera nhoroondo yake.