Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Chi Walking not so effective

I gave this two stars because some of the information is good, however when he tells you to curl your pubic bone up into a C shape when your walking that is not the cue most of us need, infact the tail tucking culture in the West is a major contributor to low back strain. I Think "8 steps to a pain-free back : natural posture solutions for pain in the back, neck, shoulder, hip, knee, and foot" is a better choice. It shows pictures of backs of other cultures who have beautiful lumbar curves which are needed to reduce stress as you walk, also you may want to check out Katy Bowmans website "Aligned and Well" a great resource for posture. Hope this helps