{"id":12414,"date":"2022-11-01T12:03:05","date_gmt":"2022-11-01T11:03:05","guid":{"rendered":"https:\/\/www.physiotutors.com\/?post_type=wiki&amp;p=12414"},"modified":"2022-11-01T12:03:05","modified_gmt":"2022-11-01T11:03:05","slug":"why-can-tests-suck","status":"publish","type":"wiki","link":"https:\/\/www.physiotutors.com\/wiki\/why-can-tests-suck\/","title":{"rendered":"Why Can Tests Suck"},"featured_media":12415,"template":"","class_list":["post-12414","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"sections":[{"acf_fc_layout":"page-header-detail-page","background":{"background_image":8856,"background_image_alt_text":"Why can tests suck"},"heading":"Why can tests suck | Proper Supra- & Infraspinatus Assessment","subheading":"Shoulder Assessment","content_editor":"","button_type":"internal_link","button_label":"Check our shop","button_style":"button-five","button_internal_link":4646,"button_anchor":"","button_url":"","button_file":"","label":""},{"acf_fc_layout":"submenu","links":[{"button_type":"anchor","button_label":"Learn","button_internal_link":null,"button_anchor":"section-number-3","button_url":"","button_file":null},{"button_type":"anchor","button_label":"Assessment E-Book","button_internal_link":null,"button_anchor":"section-number-4","button_url":"","button_file":null},{"button_type":"anchor","button_label":"Reviews","button_internal_link":null,"button_anchor":"section-number-5","button_url":"","button_file":null}],"dropdown_label":"Go to","button_right":{"button_type":"internal_link","button_label":"Become a member","button_style":"button-three","button_internal_link":16662,"button_anchor":"","button_url":"","button_file":""},"button_description":"Find this wiki on the Physiotutors platform"},{"acf_fc_layout":"content-content","section_options":{"vertical_alignment":"top","column_right_box":false,"column_left_width":"col-12 col-lg-4 offset"},"column_left":{"content_editor":"<h4>Learn<\/h4>"},"column_right":{"content_editor":"<h6>Why can tests suck | Proper Supra- &amp; Infraspinatus Assessment<\/h2>\n<span style=\"font-weight: 400;\">most probably every one of us learned the empty and full can tests as special tests for the supraspinatus muscle. <\/span><span style=\"font-weight: 400;\">However, an EMG study done by <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/19054712\/\" target=\"_blank\" rel=\"noopener\">Boettcher et al. (2009a)<\/a> has shown that the empty can and the full can test both activate 9, respectively 8 other muscles around the shoulder complex to the same degree.<\/span>\n\n<span style=\"font-weight: 400;\">It is impossible to completely isolate the cuff from other shoulder muscles, but we have to find positions that reduce the other muscles' activity better.\n<\/span><span style=\"font-weight: 400;\">Another study by <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/19812522\/\" target=\"_blank\" rel=\"noopener\">Boettcher et al. (2009b)<\/a> has shown that external rotation in the zero position is better at reducing deltoid activity, but we\u2019re going to show you the best position now:<\/span>\n<div class=\"embed-container\">\n\n[embed]https:\/\/www.youtube.com\/watch?v=nphhgdDlHBE[\/embed]\n\n<\/div>\n<span style=\"font-weight: 400;\">Having your patient in prone position allows him to relax the deltoid and trapezius muscles and to activate the supraspinatus and infraspinatus even more. Abduct the shoulder to 90\u00b0 and flex the elbow to 90\u00b0 and apply resistance at the wrist <\/span><span style=\"font-weight: 400;\">This also means that it is impossible to isolate the supraspinatus from the infraspinatus.<\/span>\n\n[cta]\n\nOther common tests to assess for subacromial impingement syndrome are:\n<ul>\n \t<li><a href=\"https:\/\/www.physiotutors.com\/wiki\/hawkins-kennedy-test\/\">Hawkins-Kennedy Test<\/a><\/li>\n \t<li><a href=\"https:\/\/www.physiotutors.com\/wiki\/neer-test\/\">Neer Test<\/a><\/li>\n \t<li><a href=\"https:\/\/www.physiotutors.com\/wiki\/full-can-test\/\">Full Can Test<\/a><\/li>\n \t<li><a href=\"https:\/\/www.physiotutors.com\/wiki\/painful-arc-sign\/\">Painful Arc Sign<\/a><\/li>\n<\/ul>\n&nbsp;\n\n&nbsp;\n"}},{"acf_fc_layout":"content-content","section_options":{"vertical_alignment":"top","column_right_box":false,"column_left_width":"col-12 col-lg-4 offset"},"column_left":{"content_editor":"<h4>References<\/h4>"},"column_right":{"content_editor":"<a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/19054712\/\" target=\"_blank\" rel=\"noopener\">Boettcher, C. E., Ginn, K. A., &amp; Cathers, I. (2009). The \u2018empty can\u2019and \u2018full can\u2019tests do not selectively activate supraspinatus.\u00a0<i>Journal of Science and Medicine in Sport<\/i>,\u00a0<i>12<\/i>(4), 435-439.<\/a>\n\n<a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/19812522\/\" target=\"_blank\" rel=\"noopener\">Boettcher, C. E., Ginn, K. A., &amp; Cathers, I. A. N. (2009). Which is the optimal exercise to strengthen supraspinatus?.\u00a0<i>Medicine and science in sports and exercise<\/i>,\u00a0<i>41<\/i>(11), 1979-1983.<\/a>"}},{"acf_fc_layout":"cta-image-v2","layout":"","background":"transparent","heading":"","content_editor":"<p class=\"subheading\">Like what you\u2019re learning?<\/p>\n<p class=\"heading-two\">BUY THE FULL PHYSIOTUTORS <strong>ASSESSMENT BOOK<\/strong><\/p>\n\n<ul>\n \t<li>600+ Pages e-Book<\/li>\n \t<li>Interactive Content (Direct Video Demonstration, PubMed articles)<\/li>\n \t<li>Statistical Values for all Special Tests from the latest research<\/li>\n \t<li>Available in \ud83c\uddec\ud83c\udde7 \ud83c\udde9\ud83c\uddea \ud83c\uddeb\ud83c\uddf7 \ud83c\uddea\ud83c\uddf8 \ud83c\uddee\ud83c\uddf9 \ud83c\uddf5\ud83c\uddf9 \ud83c\uddf9\ud83c\uddf7<\/li>\n \t<li>And much more!<\/li>\n<\/ul>","button_type":"internal_link","button_label":"Check out our 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