I believe it was true considering the rush he was in most of his life. Dancing here, there and everywhere. As Manuel Legris said: "Rudolf Nureyev was a high-speed train (he was a TGV). Working with Nureyev involved having to surpass oneself and stepping on it.” (Wikipedia.)
I took my picture of him in the mid-1980s in Central Park, a short distance from his apartment on Central Park West, when he had slowed up a bit through ill health.