Abstract:
BACKGROUND:Because physical activity researchers are increasingly using objective portable devices, this review describes the current state of the technology to assess physical activity, with a focus on specific sensors and sensor properties currently used in monitors and their strengths and weaknesses. Additional sensors and sensor properties desirable for activity measurement and best practices for users and developers also are discussed. BEST PRACTICES:We grouped current sensors into three broad categories for objectively measuring physical activity: associated body movement, physiology, and context. Desirable sensor properties for measuring physical activity and the importance of these properties in relationship to specific applications are addressed, and the specific roles of transducers and data acquisition systems within the monitoring devices are defined. Technical advancements in sensors, microcomputer processors, memory storage, batteries, wireless communication, and digital filters have made monitors more usable for subjects (smaller, more stable, and longer running time) and for researchers (less costly, higher time resolution and memory storage, shorter download time, and user-defined data features). FUTURE DIRECTIONS:Users and developers of physical activity monitors should learn about the basic properties of their sensors, such as range, accuracy, and precision, while considering the data acquisition/filtering steps that may be critical to data quality and may influence the desirable measurement outcome(s).
journal_name
Med Sci Sports Exercjournal_title
Medicine and science in sports and exerciseauthors
Chen KY,Janz KF,Zhu W,Brychta RJdoi
10.1249/MSS.0b013e3182399bc8subject
Has Abstractpub_date
2012-01-01 00:00:00pages
S13-23issue
1 Suppl 1eissn
0195-9131issn
1530-0315pii
00005768-201201001-00003journal_volume
44pub_type
杂志文章,评审abstract::Natural killer (NK) cells are highly influenced by physical exercise. The possible important mechanisms behind exercise-induced changes in NK cell function are cytokines, hyperthermia, and stress hormones, including catecholamines, growth hormone, cortisol, and beta-endorphins. Infusion studies mimicking stress hormon...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章,评审
doi:10.1249/00005768-199402000-00003
更新日期:1994-02-01 00:00:00
abstract::The coordination of blood flow control in exercising skeletal muscle is exemplified by the interaction among muscle fibers, nerves, and the smooth muscle and endothelial cells which comprise the resistance vasculature. During functional hyperemia in active muscle, maximal flow exceeds resting values by 10- to 50-fold,...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章,评审
doi:
更新日期:1995-08-01 00:00:00
abstract:PURPOSE:We evaluated the associations between accelerometer-estimated physical activity (PA) intensity and heart rate variability (HRV) and examined mediation of these associations by glycemic control indices and other cardiovascular disease risk factors. METHODS:Data were from 1668 participants (X[Combining Overline]...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000002259
更新日期:2020-06-01 00:00:00
abstract:PURPOSE:Physical fitness and physical activity tracking data enhance our understanding as to when children settle into their long-term exercise and fitness patterns and, therefore. provide insight as to when programs focusing on preventing sedentary adults behaviors should be initiated. METHODS:In this paper, the trac...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1097/00005768-200007000-00011
更新日期:2000-07-01 00:00:00
abstract::The present study examined the validity of selected bioelectrical impedance (BIA) equations for estimating percent fat (% fat) in males and compared their validity with that of a commonly used skinfold equation (Sum3). One-hundred twenty-two Caucasian males (X +/- SD = 12.5 +/- 5.8% fat, as determined by underwater we...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1097/00005768-199604000-00019
更新日期:1996-04-01 00:00:00
abstract::Heavy whole-body exercise, requiring a 10- to 15-fold increase in minute ventilation, encroaches on the capacities of the respiratory muscle system to respond. Recently, using the technique of bilateral phrenic nerve stimulation, it has been shown that heavy endurance exercise (> 85% of VO2max) lasting > 8-10 min caus...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章,评审
doi:10.1097/00005768-199609000-00008
更新日期:1996-09-01 00:00:00
abstract::: The relevance of translational medicine (bringing basic science methods "to the bed of patients") is universally recognized. Too often, however, the tools to be applied translationally are thought to derive only from the "-omics" (genomics, proteomics, transcriptomics, metabolomics, etc.) world. The failures of this...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章,评审
doi:10.1249/MSS.0000000000002056
更新日期:2019-11-01 00:00:00
abstract::Exercise and noise exposure causes temporary hearing loss. Yet, a direct relationship may exist between cardiovascular health and hearing. The purpose of this study was to determine whether noise and exercise caused different levels of hearing loss depending on one's cardiovascular fitness. Twenty-eight volunteers wer...
journal_title:Medicine and science in sports and exercise
pub_type: 临床试验,杂志文章
doi:
更新日期:1994-07-01 00:00:00
abstract:PURPOSE:To examine the effects of prolonged systemic administration of diclofenac sodium (Voltaren), a nonsteroidal anti-inflammatory drug, on objective indices of exercise-induced muscle damage in humans. METHODS:Fifty-four volunteers (mean age, 26.4 yr; range, 18-35) participated in this randomized double-blind, pla...
journal_title:Medicine and science in sports and exercise
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00005768-200007000-00001
更新日期:2000-07-01 00:00:00
abstract::Physical inactivity has been linked to rates of obesity, diabetes, and heart disease through insulin resistance and other mechanisms. Although sedentary workplace environments have unintentionally contributed to the risk for chronic diseases, innovations in the workplace environment could potentially rectify this publ...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000001679
更新日期:2018-10-01 00:00:00
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journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000001687
更新日期:2018-11-01 00:00:00
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journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1097/00005768-199708000-00008
更新日期:1997-08-01 00:00:00
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journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1097/00005768-199704000-00019
更新日期:1997-04-01 00:00:00
abstract::Participation in sports in on the increase; this article addresses the intersection of sports and infectious diseases. Some infections occur with increased incidence in sports; others have an increased impact in that setting. Addressed in this article are issues of diagnosis, prevention, and management of many of thes...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章,评审
doi:10.1097/00005768-200007001-00008
更新日期:2000-07-01 00:00:00
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journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000001660
更新日期:2018-10-01 00:00:00
abstract:PURPOSE:The cold pain sensitivity in fighter pilots was studied by using a cold pressor test. METHODS:The pilots were divided into two groups: one group consisting of eight pilots (N = 8) who had experienced several acute in-flight neck pain attacks, and the control group (N = 8) who had not experienced these pain con...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1097/00005768-199804000-00016
更新日期:1998-04-01 00:00:00
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journal_title:Medicine and science in sports and exercise
pub_type: 指南,杂志文章,实务指引,评审
doi:
更新日期:1993-10-01 00:00:00
abstract::The taper is a progressive nonlinear reduction of the training load during a variable period of time, in an attempt to reduce the physiological and psychological stress of daily training and optimize sports performance. The aim of the taper should be to minimize accumulated fatigue without compromising adaptations. Th...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章,评审
doi:10.1249/01.MSS.0000074448.73931.11
更新日期:2003-07-01 00:00:00
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journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1097/00005768-200108000-00019
更新日期:2001-08-01 00:00:00
abstract::During exercise, especially endurance exercise in the heat, vital body fluids and essential ions are lost in sweat, and the body may deplete its glycogen stores. Unless essential body fluids are restored, these conditions can produce hypovolemia, hypoglycemia, hyponatremia, hyperthermia, and dehydration. Performance m...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章,评审
doi:
更新日期:1992-06-01 00:00:00
abstract:PURPOSE:The objective of this study is to test the feasibility and impact of a 10-wk after-school exercise program for children with attention deficit hyperactivity disorder and/or disruptive behavior disorders living in an urban poor community. METHODS:Children were randomized to an exercise program (n = 19) or a com...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章,随机对照试验
doi:10.1249/MSS.0000000000000891
更新日期:2016-07-01 00:00:00
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journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
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更新日期:2014-03-01 00:00:00
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journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000002221
更新日期:2020-05-01 00:00:00
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journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1097/00005768-199602000-00013
更新日期:1996-02-01 00:00:00
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journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0b013e3181a8c360
更新日期:2009-11-01 00:00:00
abstract::The effects of the potent opioid, sufentanil, were studied in 11 athletes. Sufentanil was administered intravenously (up to 0.5 microgram.kg-1 over 10 min) to the subjects while they ran at 14 km.hr-1 on a level treadmill. Prior to, and after, the drug infusion, the treadmill was inclined by 6% for 4 min and CO2 was i...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:
更新日期:1988-12-01 00:00:00
abstract:UNLABELLED:The protective effects of cardiorespiratory fitness (CRF) on hypertension (HTN) are well known; however, the association between muscular strength and incidence of HTN has yet to be examined. PURPOSE:This study evaluated the strength-HTN association with and without accounting for CRF. METHODS:Participants...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0b013e3181b2f0a4
更新日期:2010-02-01 00:00:00
abstract::This study compared the effects of exercise or TXB2 and beta-TG when evaluated by four methods: 1) not adjusted; 2) adjusted for plasma volume changes (PV); 3) standardized per 10(5) platelets (PC); 4) or both PC and PV (PC-PV). Blood was collected from 16 men (41.3 +/- 8.1 yr) at rest after 30 min of exercise (IPE) a...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1097/00005768-199705000-00018
更新日期:1997-05-01 00:00:00
abstract:PURPOSE:Although several studies have shown that immune cells stimulated by in vitro stress are capable to produce neurotrophins, there is still no evidence whether physiological stress, such as exercise, can modulate the in vivo levels of brain-derived neurotrophic factor (BDNF) in peripheral blood mononuclear cells (...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0b013e31825ab69b
更新日期:2012-10-01 00:00:00
abstract:PURPOSE:The purpose of this investigation was to examine the effects of differing amounts of beta-hydroxy-beta-methylbutyrate (HMB), 0, 36, and 76 mg x kg(-1) x d(-1), on hematology, hepatic and renal function during 8 wk of resistance training. METHODS:Thirty-seven, untrained collegiate males and were randomly assign...
journal_title:Medicine and science in sports and exercise
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2000-12-01 00:00:00