Hello all,
What is being offered in the PR course are guidelines that have worked successfully for many. Debates and all can go on and on regarding standing, sitting, lying down etc... but remember guidelines offer a choice or starting point, but what matters is that you are 'comfortable' and can remain 'relaxed' during the entire process. So if one can achieve this while sitting, standing up or lying down ... then position becomes irrelevant. IMHO of course! 
Humbily,
Michael Saikali
