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Submaximal field tests are especially recommended when repeated testing is warranted. This study aimed at assessing the validity of the submaximal versions of the Yo-Yo intermittent tests in male recreational football players in untrained and trained status. The participants' (n=66; age 39.3±5.8 years, VO 41.2±6.2 ml·kg ·min , body mass 81.9±10.8 kg, height 173.2±6.4 cm) heart rate after 2 min (HR ) during the level 1 (YYIE1 ) and 2 (YYIE2 ) versions of the Yo-Yo intermittent endurance test and the level 1 version of the Yo-Yo intermittent recovery test (YYIR ) was plotted against individual VO values. Thirty-two participants performed all the tests after a 12-week recreational football intervention for test responsiveness. Associations between VO and YYIE1 were large to small (P=0.0001). Large to trivial associations were found between YYIE2 , YYIR1 and VO (P<0.01). Maximal Yo-Yo performances were large, significant and inversely related to HR (-0.68 to -0.49, P<0.0001). Pre-to-post-intervention ICC values were good for YYIE1 and YYIE2 , and excellent for YYIR1 . Post-intervention associations between HR and Yo-Yo maximal performances were large to very large (-0.55 to -0.72; P<0.002, n=32). Training-induced changes in VO moderately correlated with YYR1 (-0.48; P=0.007; n=32). HR lower than 89%, 98% and 91%HR for YYIE1 , YYIE2 and YYIR1 , respectively, may be considered as signs of good to excellent VO levels. Since in the YYIE1 , the participants attained 84%HR and test specificity increased for HR values <89%, this test may be the preferred choice when repeated assessment of aerobic fitness, using submaximal intermittent Yo-Yo tests, is considered in recreational football.
This article was published in the following journal.
Name: Scandinavian journal of medicine & science in sports
To examine the suitability of three versions and two levels of the Yo-Yo intermittent tests for assessing and tracking aerobic fitness status development in male recreational football players. Sixty-s...
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Cardiovascular disease (CVD)
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