33 & 34. Walking (though it may only be from Ihc bus stop or parking lot to the officc) can a fiord you thc oppor-tunity to excrcise many ditferent mus* clcs. Each time you swing your arms, tensc and rclnx your fists with cver> step; (h) tensc and relax your stornach with cvery other step: fr) tensc and relax your chest with every other step; (</) tensc and relax your ncck with evcry other step.
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