Abstract:
BACKGROUND/AIM:Consumer-based physical activity (PA) monitors have become popular tools to track PA behaviours. Currently, little is known about the validity of the measurements provided by consumer monitors. We aimed to compare measures of steps, energy expenditure (EE) and active minutes of four consumer monitors with one research-grade accelerometer within a semistructured protocol. METHODS:Thirty men and women (18-80 years old) wore Fitbit One (worn at the waist), Fitbit Zip (waist), Fitbit Flex (wrist), Jawbone UP24 (wrist) and one waist-worn research-grade accelerometer (ActiGraph) while participating in an 80 min protocol. A validated EE prediction equation and active minute cut-points were applied to ActiGraph data. Criterion measures were assessed using direct observation (step count) and portable metabolic analyser (EE, active minutes). A repeated measures analysis of variance (ANOVA) was used to compare differences between consumer monitors, ActiGraph, and criterion measures. Similarly, a repeated measures ANOVA was applied to a subgroup of subjects who didn't cycle. RESULTS:Participants took 3321±571 steps, had 28±6 active min and expended 294±56 kcal based on criterion measures. Comparatively, all monitors underestimated steps and EE by 13%-32% (p<0.01); additionally the Fitbit Flex, UP24, and ActiGraph underestimated active minutes by 35%-65% (p<0.05). Underestimations of PA and EE variables were found to be similar in the subgroup analysis. CONCLUSION:Consumer monitors had similar accuracy for PA assessment as the ActiGraph, which suggests that consumer monitors may serve to track personal PA behaviours and EE. However, due to discrepancies among monitors, individuals should be cautious when comparing relative and absolute differences in PA values obtained using different monitors.
journal_name
Br J Sports Medjournal_title
British journal of sports medicineauthors
Imboden MT,Nelson MB,Kaminsky LA,Montoye AHdoi
10.1136/bjsports-2016-096990subject
Has Abstractpub_date
2018-07-01 00:00:00pages
844-850issue
13eissn
0306-3674issn
1473-0480pii
bjsports-2016-096990journal_volume
52pub_type
杂志文章abstract:OBJECTIVE:To describe the prevalence of doping and its progression in a cohort of preadolescent athletes during a 4-year follow-up. DESIGN AND SETTINGS:Prospective cohort study. Self-questionnaire survey. PARTICIPANTS:All of the pupils entering the first year of secondary school (sixth grade) in the Vosges Départemen...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2007.035733
更新日期:2007-10-01 00:00:00
abstract:BACKGROUND:At the Second International Conference on Concussion in Sport, concussion was classified as "simple" or "complex" based largely on duration of clinical features. The purpose of the classification system was to assist clinicians in identifying higher grades of injury severity and guide injury management. The ...
journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1136/bjsm.2009.058206
更新日期:2009-05-01 00:00:00
abstract:OBJECTIVE:To summarise the main results of a community-based study on physical activity promotion - "Romsås in Motion". METHODS:The study assessed changes in physical activity, body mass and psychosocial mediators of physical activity from a pseudo-experimental cohort study involving two districts with low socioeconom...
journal_title:British journal of sports medicine
pub_type: 杂志文章,多中心研究
doi:10.1136/bjsm.2008.053637
更新日期:2009-01-01 00:00:00
abstract:OBJECTIVE:Devise and implement evidence-based guidelines for the prevention and management of travellers' diarrhoea (TD), and establish the incidence of TD during an elite sporting trip to India. DESIGN:Literature review and audit. SETTING:Youth Commonwealth Games in India 2008. PARTICIPANTS:All members of the Team ...
journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1136/bjsm.2009.063396
更新日期:2009-12-01 00:00:00
abstract:OBJECTIVES:To measure functional recovery following acute anterior cruciate ligament (ACL) rupture using a simple and reliable clinical movement analysis system. Clinic based methods that simultaneously quantify different aspects of movement over a range of activities and model functional recovery will help guide rehab...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2005.019984
更新日期:2005-11-01 00:00:00
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journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsports-2014-094424
更新日期:2015-07-01 00:00:00
abstract:BACKGROUND:Very little data have been published on medical imaging services at disability games. 7.9 million euros (£6.6 million, US$11 million) were invested in setting up radiology facilities within purpose built polyclinics at the London 2012 Olympic and Paralympic games. This paper details imaging services at the 2...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsports-2013-093386
更新日期:2015-01-01 00:00:00
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journal_title:British journal of sports medicine
pub_type: 杂志文章,meta分析,评审
doi:10.1136/bjsports-2016-097071
更新日期:2017-07-01 00:00:00
abstract:OBJECTIVE:Functional strength deficits associated with chronic isolated posterior cruciate ligament (PCL) insufficiency have received limited attention in the literature. The purpose of this study was to determine the eccentric and concentric isokinetic moment characteristics of the quadriceps and hamstrings in a sampl...
journal_title:British journal of sports medicine
pub_type: 临床试验,杂志文章
doi:10.1136/bjsm.33.6.405
更新日期:1999-12-01 00:00:00
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journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2008.046185
更新日期:2008-06-01 00:00:00
abstract:OBJECTIVE:The crucial role of haemoglobin in endurance performance has been well documented. We examined whether polymorphisms in the HBB gene modified aerobic capacity. METHODS:102 recruits were trained by running 5000 m three times per week for 18 weeks. Exercise intensity progressively increased from an initial hea...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2006.030866
更新日期:2006-12-01 00:00:00
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journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2003.004747
更新日期:2004-04-01 00:00:00
abstract:BACKGROUND:The methodological quality of studies on treatment of anterior cruciate ligament (ACL) injuries in skeletally immature children after ACL injury is low, and no prospective studies have evaluated the functional outcomes following a non-operative treatment algorithm. PURPOSE:To report changes in knee function...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsports-2012-092066
更新日期:2013-05-01 00:00:00
abstract::Evidence from familial and genetic association studies have reported that DNA sequence variants play an important role, together with non-genetic factors, in the aetiology of both exercise-associated and occupational-associated acute and chronic musculoskeletal soft tissue injuries. The associated variants, which have...
journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
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更新日期:2015-12-01 00:00:00
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journal_title:British journal of sports medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1136/bjsm.2003.000199
更新日期:2004-06-01 00:00:00
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journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1136/bjsports-2011-090360
更新日期:2012-06-01 00:00:00
abstract:BACKGROUND/AIM:The Achilles tendon is a tissue that responds to mechanical loads at a molecular and cellular level. In vitro and in vivo studies have shown that the expression of anabolic and/or catabolic proteins can change within hours of loading and return to baseline levels within 72 h. These biochemical changes ha...
journal_title:British journal of sports medicine
pub_type: 杂志文章,随机对照试验
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更新日期:2015-02-01 00:00:00
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更新日期:2010-11-01 00:00:00
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journal_title:British journal of sports medicine
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更新日期:1998-09-01 00:00:00
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更新日期:2010-09-01 00:00:00
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journal_title:British journal of sports medicine
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更新日期:2012-01-01 00:00:00
abstract::Anabolic androgenic steroids (AAS) are used illicitly at high doses by bodybuilders. The misuse of these drugs is associated with serious adverse effects to the liver, including cellular adenomas and adenocarcinomas. We report two very different cases of adult male bodybuilders who developed hepatocellular adenomas fo...
journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1136/bjsm.2004.013599
更新日期:2005-05-01 00:00:00
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journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.31.1.41
更新日期:1997-03-01 00:00:00
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journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
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更新日期:2015-01-01 00:00:00
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更新日期:1985-03-01 00:00:00
abstract::Tournament water skiing is an increasingly popular and internationally successful sport in Great Britain, despite the climate. The kinematics and injury patterns of the three disciplines will be unfamiliar to most clinicians and are described, with estimation of the stresses. Advances in equipment over the last 15 yea...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.30.2.90
更新日期:1996-06-01 00:00:00
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pub_type: 杂志文章
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更新日期:2005-09-01 00:00:00