On the following day, you will hike to Tengboche in approximately 6 hours. Arriving there is highly welcomed since the ascent is hard and the air gets thinner. Alternating up and downhill parts feel exhausting. However, if you take your time and do not hurry you will arrive at Tengboche by the end of the day. Remember, slowly is the keyword! Take your rest whenever needed, there are several resting places for having lunch and tea on the way. It's a good idea to have power snacks with you. And highly important: drink a lot!