Mechanical and free living comparisons of four generations of the Actigraph activity monitor.
Mechanical and free living comparisons of four generations of the Actigraph activity monitor.
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DOI：
10.1186/1479-5868-9-113
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发表时间：
2012-09-12
期刊：
影响因子：
--
通讯作者：
Møller NC
中科院分区：
文献类型：
--
作者：
Ried-Larsen M;Brønd JC;Brage S;Hansen BH;Grydeland M;Andersen LB;Møller NC
更多的研究包括多代Actigraph活动监测器。到目前为止，还没有研究比较包括最新一代在内的输出，并调查启用低频扩展(LFE)选项时对活动监视器输出的影响。目的是研究四代Actigraph活动监测器(AM7164、GT1M、GT3X和GT3X+)在机械设置和自由生活环境中启用和不启用LFE选项时的响应。监视器在使用两个半径的机械设置中振荡，频率范围为0.25-3.0 赫兹。在机械研究之后，一个方便样本(N = 20)佩戴了三个显示器(一个AM7164和两个GT3X)，持续24 小时。AM7164型在机械结构上不同于新一代的频率(p <； 0.05)。与新一代相比，AM7164在较低和最高强度下的产量较高，而在中等强度下的产量较低。LFE选项减小了较低频率的差异，但增加了较高频率的差异。在自由生活中，GT3X的平均体力活动水平(PA)比AM7164低18次/分钟(8%)(p <； 0.001)。与AM7164相比，GT3X评估的久坐时间增加了26.6 分钟(95%可信区间为15.6至35.3)(p <； 0.001)。与AM7164相比，在轻度和重度PA中花费的时间分别减少了23.3 分钟(95%可信区间31.8至14.8)和11.7 分钟(95%可信区间2.8至0.7)(p <； 0.05)。启用LFE时，静坐和光照PA强度的差异(<；333计数*10 秒-1)会减弱(代间差异的p &> 0.05)，从而减弱启用LFE选项时平均PA的差异(p >； 0.05)。然而，它并没有减少在强健的PA中花费的时间的差异，而且它导致了不同世代之间在中度PA中花费的时间的差异(+3.0Min(95%CI0.4to5.6))。我们观察到AM7164和较新的Actigraph GT代(GT1M、GT3X和GT3X+)在机械设置和自由生活方面的显著差异。启用LFE选项可完全减弱平均PA的差异，但会导致中等PA强度的偏差。
More studies include multiple generations of the Actigraph activity monitor. So far no studies have compared the output including the newest generation and investigated the impact on the output of the activity monitor when enabling the low frequency extension (LFE) option. The aims were to study the responses of four generations (AM7164, GT1M, GT3X and GT3X+) of the Actigraph activity monitor in a mechanical setup and a free living environment with and without enabling the LFE option. The monitors were oscillated in a mechanical setup using two radii in the frequency range 0.25-3.0 Hz. Following the mechanical study a convenience sample (N = 20) wore three monitors (one AM7164 and two GT3X) for 24 hours. The AM7164 differed from the newer generations across frequencies (p < 0.05) in the mechanical setup. The AM7164 produced a higher output at the lower and at the highest intensities, whereas the output was lower at the middle intensities in the mid-range compared to the newer generations. The LFE option decreased the differences at the lower frequencies, but increased differences at the higher. In free living, the mean physical activity level (PA) of the GT3X was 18 counts per minute (CPM) (8%) lower compared to the AM7164 (p < 0.001). Time spent in sedentary intensity was 26.6 minutes (95% CI 15.6 to 35.3) higher when assessed by the GT3X compared to the AM7164 (p < 0.001). Time spend in light and vigorous PA were 23.3 minutes (95% CI 31.8 to 14.8) and 11.7 minutes (95% CI 2.8 to 0.7) lower when assessed by the GT3X compared to the AM7164 (p < 0.05). When enabling the LFE the differences in the sedentary and light PA intensity (<333 counts*10 sec-1) were attenuated (p > 0.05 for differences between generations) thus attenuated the difference in mean PA (p > 0.05) when the LFE option was enabled. However, it did not attenuate the difference in time spend in vigorous PA and it introduced a difference in time spend in moderate PA (+ 3.0 min (95% CI 0.4 to 5.6)) between the generations. We observed significant differences between the AM7164 and the newer Actigraph GT-generations (GT1M, GT3X and GT3X+) in a mechanical setup and in free-living. Enabling the LFE option attenuated the differences in mean PA completely, but induced a bias in the moderate PA intensities.
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DOI：
10.1111/j.1600-0838.2006.00622.x
发表时间：
2008-04-01
影响因子：
4.1
作者：
Kristensen, P. L.;Moller, N. C.;Froberg, K.
通讯作者：
Froberg, K.
DOI：
10.1097/00005768-199805000-00021
发表时间：
1998-05-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
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通讯作者：
Sirard, J
DOI：
10.1097/00005768-200209000-00022
发表时间：
2002-09-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
--
作者：
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通讯作者：
Wilkin, TJ
影响因子：
5
作者：
Matthews, Charles E.;Chen, Kong Y.;Troiano, Richard P.
通讯作者：
Troiano, Richard P.
DOI：
10.1249/01.mss.0000235884.71487.21
发表时间：
2007-01-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
--
作者：
Fudge, Barry W.;Wilson, John;Pitsiladis, Yannis P.
通讯作者：
Pitsiladis, Yannis P.