Guru maharaj: Srila Bhaktisiddanta Saraswati Thakur, he would chant his japa walking up and down. So he was a very active person. He got his taste and chant walking. Some people chant sitting down, some people pace, there is no hard and fast rule. If you don’t find the chanting sitting down and you get tired or sleepy, try walking. Sometimes if you chant Panca Tattva mantra Sri Krsna Caitanya Prabhu Nityananda Sri Advaita Gadadhar Srivas Adi Gaura bhakta vrnda, then you also chant Hare Krsna more enthusiastically. Hare Krsna!