{"id":1962,"date":"2008-06-03T07:00:09","date_gmt":"2008-06-03T15:00:09","guid":{"rendered":"http:\/\/www.tommangan.net\/twoheeldrive\/?p=1962"},"modified":"2008-06-03T07:02:07","modified_gmt":"2008-06-03T15:02:07","slug":"the-bad-news-on-backpack-straps","status":"publish","type":"post","link":"https:\/\/www.tommangan.net\/twoheeldrive\/index.php\/2008\/06\/03\/the-bad-news-on-backpack-straps\/","title":{"rendered":"The bad news on backpack straps"},"content":{"rendered":"<p><a href=\"http:\/\/outdoortech.blogspot.com\/2008\/05\/study-pack-straps-cut-blood-flow.html\">Outdoor Tech blogger Clyde Soles <\/a>notes a study which says pack straps decrease circulation in hands and fingers. <\/p>\n<blockquote><p>Using ultrasound and a pulse oximeter, the scientists measured brachial artery pressure as well as capillary flow in the finger tips. After 10 minutes, only a 26 pound load was sufficient to reduce blood flow in the arm by about 43% and in the finger tips by about 54%. They blame this on the straps compressing the axillary vein. It&#8217;s particularly noteworthy for mountaineers since this reduction could make us more prone to frostbite.<\/p><\/blockquote>\n<p>Clyde posted a picture of a Sherpa with one of those head straps they wear while carrying huge loads up Mount Everest, and notes that studies done in Africa show people can carry a lot more weight on their heads than they might realize. <\/p>\n<p>I suspect we&#8217;re so enamored of shoulder straps because the outdoors world has traditionally taken its cues from the military, where the need to keep one&#8217;s head totally mobile for survival reasons obliges shifting pack weight to the shoulders. For just plain old freight hauling where self-defense is less of an issue, the Sherpas have got it down. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Outdoor Tech blogger Clyde Soles notes a study which says pack straps decrease circulation in hands and fingers. Using ultrasound and a pulse oximeter, the scientists measured brachial artery pressure as well as capillary flow in the finger tips. After&hellip;<\/p>\n<p class=\"more-link-p\"><a class=\"more-link\" href=\"https:\/\/www.tommangan.net\/twoheeldrive\/index.php\/2008\/06\/03\/the-bad-news-on-backpack-straps\/\">Read the whole thing<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[34],"tags":[],"_links":{"self":[{"href":"https:\/\/www.tommangan.net\/twoheeldrive\/index.php\/wp-json\/wp\/v2\/posts\/1962"}],"collection":[{"href":"https:\/\/www.tommangan.net\/twoheeldrive\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tommangan.net\/twoheeldrive\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tommangan.net\/twoheeldrive\/index.php\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tommangan.net\/twoheeldrive\/index.php\/wp-json\/wp\/v2\/comments?post=1962"}],"version-history":[{"count":0,"href":"https:\/\/www.tommangan.net\/twoheeldrive\/index.php\/wp-json\/wp\/v2\/posts\/1962\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.tommangan.net\/twoheeldrive\/index.php\/wp-json\/wp\/v2\/media?parent=1962"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tommangan.net\/twoheeldrive\/index.php\/wp-json\/wp\/v2\/categories?post=1962"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tommangan.net\/twoheeldrive\/index.php\/wp-json\/wp\/v2\/tags?post=1962"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}