Guerra-Balic Myriam, Oviedo Guillermo R, Javierre Casimiro, Fortuño Jesús, Barnet-López Silvia, Niño Oscar, Alamo Juan, Fernhall Bo
FPCEE-Blanquerna, University Ramon Llull, c/ Cister 34, Barcelona 08022, Spain.
FPCEE-Blanquerna, University Ramon Llull, c/ Cister 34, Barcelona 08022, Spain; School of Biokinetics, Recreation and Sport Science, North-West University (Potchefstroom Campus), Private Bag X 6001, Potchefstroom 2520, South Africa.
Res Dev Disabil. 2015 Dec;47:144-53. doi: 10.1016/j.ridd.2015.09.011. Epub 2015 Sep 29.
Adults with intellectual disabilities (ID) have significantly lower rates of physical activity and fitness than adults without ID. The 6-min walk test (6 MWT) is an inexpensive and simple way to test mobility and submaximal work capacity.
To evaluate the test-retest reliability and validity of the 6 MWT in adults and seniors with ID and explore factors contributing to the 6 MWT distance (6 MWD).
46 participants with mild, moderate and severe ID levels (age=41 ± 11 years) performed the 6 MWT three times (T1; T2; T3) to determine test-retest reliability. To test validity, peak oxygen uptake (VO2 peak) was measured using a treadmill protocol. To analyze factors contributing to the 6 MWD, sex, height, fat mass % and fat free mass %, ID level, isometric leg strength and relative VO2 peak were also measured.
The walking distances for T1, T2 and T3 were 460.3 ± 76.9; 489.4 ± 81.2 and 491.4 ± 77.9 m, respectively. The 6 MWDs between T1-T2 and T1-T3 were significantly different (p<0.001), but T2 and T3 were not different. The intraclass correlation coefficient between T2 and T3 was 0.96 indicating high reliability. Relative VO2 peak and isometric leg strength significantly contributed to the 6 MWD (R(2)=0.55).
The 6 MWT is an easy, inexpensive, reliable and valid test in adults and seniors with ID. Familiarization is necessary to obtain reliable values. Relative VO2 peak and leg strength have significant impact on the distance walked.
与无智力障碍的成年人相比，有智力障碍（ID）的成年人身体活动和健康水平明显较低。6分钟步行试验（6MWT）是一种测试活动能力和次最大工作能力的廉价且简单的方法。
评估6MWT在有ID的成年人和老年人中的重测信度和效度，并探索影响6MWT步行距离（6MWD）的因素。
46名轻度、中度和重度ID水平的参与者（年龄 = 41 ± 11岁）进行了3次6MWT（T1；T2；T3）以确定重测信度。为测试效度，使用跑步机方案测量峰值摄氧量（VO2峰值）。为分析影响6MWD的因素，还测量了性别、身高、体脂百分比和去脂体重百分比、ID水平、等长腿部力量和相对VO2峰值。
T1、T2和T3的步行距离分别为460.3 ± 76.9米、489.4 ± 81.2米和491.4 ± 77.9米。T1 - T2和T1 - T3之间的6MWD有显著差异（p < 0.001），但T2和T3之间无差异。T2和T3之间的组内相关系数为0.96，表明信度高。相对VO2峰值和等长腿部力量对6MWD有显著影响（R(2)=0.55）。
6MWT在有ID的成年人和老年人中是一种简单、廉价、可靠且有效的测试。为获得可靠值，需要进行熟悉过程。相对VO2峰值和腿部力量对步行距离有显著影响。
