On November 13, 1966, Edwin "Buzz" Aldrin became the first to successfully work in space without tiring during Gemini XII, the last Gemini mission. Aldrin worked outside the spacecraft for 2 hours and 6 minutes, in addition to two stand-up EVAs in the spacecraft hatch for an additional 3 hours and 24 minutes. Aldrin's interest in scuba diving inspired the use of underwater EVA training to simulate weightlessness, which has been used ever since to allow astronauts to practice techniques of avoiding wasted muscle energy.
on noVEmbeR 13 1966 EDwin "buzz" aldriN BEcAme ThE fIrSt To succeSsfuLlY work in spAcE wIthOuT TIrinG durINg geMinI xiI the laST geMini mIssiOn ALdriN worked OutsIDe thE spAcEcrAft fOR 2 hOuRs and 6 MiNUTes In adDition to tWo StanD-up evas iN The SpAceCRaft hATch For an addiTIoNaL 3 houRs And 24 minutEs AldrIN's InTerest in scUBa dIVIng inspiReD thE uSe of unDerwater Eva traIninG to sImULATe weiGhtLEssneSS WHich Has been used ever since tO allOw astrOnauts TO prActiCe TEchniquEs of aVoIdIng WastEd MUscle enErgY