Say I went to Manali, and practiced hill runs on my bicycle from 6000, up to 10K feet, sleeping at 6K feet every night, but maybe camping at 1000 foot or so intervals higher each night.... but more probably sleeping in a bed in Manali at 6,000 feet... I do this for three weeks. Then I go to Dharamsala (where the Dalai Lama lives) at less than 6000 feet to sit on my ass for 10 days and meditate. I eat rice and lentils and tea and jam. I can walk for an hour a day, uphill if I like... but vigorous exercise is not permitted. Its a meditation retreat. Then I go back to Manali, to ride to Leh, and beyond to the world's highest motorable pass. How much of my altitude training benefits can I expect to have lost? How long does hematocrit-shits take to fall? I can still take a week or two to adjust in Manali, if I have to, but I'd rather get it over with after like a week at most. I got other shit to do, but they pushed back my acceptance into the meditaion retreat to July 1st and so I have time to train... I'm gonna pull the Manali->Leh run early if I can, by adjusting and training at altitude before the retreat, and then doing some small training after, and making the run. If I lose my adjustments, I will want to adjust all over again... know what I mean? I'm going alone. AMS could kill me. Please advice.