Wow cool. Wouldn't have though about this, but the arm swing seems to add 9cm to one's jump: Participants jumped higher (0.086 m) in the arm swing com

Wow cool. Wouldn't have though about this, but the arm swing seems to add 9cm to one's jump: Participants jumped higher (0.086 m) in the arm swing compared to the no-arm swing condition ... --- http://www.ncbi.nlm.nih.gov/pubmed/15519601