Run faster by swinging your arms more efficiently says the NY Times; Three tips to help you run more efficiently.
Run smarter, rather than harder is what I tell our patients when we do treadmill evaluations in the office. There are great variations in how people use their arms as they run, and some variations end up slowing us down or even may be responsible for stitches we feel in the diaphragm.
When we run, we will stride and then counter stride. If one leg tends to stride unevenly, as seen in those who are built asymmetrically (we have proven that on every video we have done in the office), typically, the arm and body motion will reflect this as well with an uneven counter stride in our upper body. This can have a shearing effect on the thoracolumbar fascia, causing it to always be tight (fascia forms according to the forces we place upon it).
The good news is that we can modify some of these factors with better shoes, off the shelf or custom orthotic insoles and proper instruction as runners become self aware of the way they run. Visualizing this through videos taken with a phone is quite helpful, as it results in a more efficient stride, more even stride side to side, less under and over striding and a better expenditure of energy.
Apparently, researches of this phenomenon have studied arm movement and form and the NY Times recently reported on it.
Check out the article here