Both have no plausibility. Acupuncture was developed by ancient cultures which had no model of how the human body works. It has been thoroughly tested; the overall literature shows that it works no better than placebo, and it doesn't matter where the needles are inserted - this shows that there is no such thing as meridians, acupuncture points or Qi.
Reflexolgy is unable to beat placebo in clinical trials, and a 2009 systematic review of the best evidence available found that reflexology is not an effective treatment for any medical condition.
http://www.ncbi.nlm.nih.gov/pubmed/19740047
http://en.wikipedia.org/wiki/Reflexology#Criticism
http://www.sciencebasedmedicine.org/?cat=8
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EDIT: @thenoseknows, how dare YOU accuse people like me of making false and misleading claims. My answer is nothing but the truth and is supported with citations. As opposed to you, who frequently lies here with gems like homeopathy cures epilepsy, asthma and cancer, and you refuse to back up these claims with a single shred of evidence when asked. Its clear you are a fraud - if you don't agree then please provide your scientific proof that acupuncture and reflexology "work by increasing circulation and improving/freeing up blocked nerve impulses". After all, that was what the question was.