scholarly journals Metabolic Power Method: Underestimation of Energy Expenditure in Field-Sport Movements Using a Global Positioning System Tracking System

2016 ◽  
Vol 11 (8) ◽  
pp. 1067-1073 ◽  
Author(s):  
Darcy M. Brown ◽  
Dan B. Dwyer ◽  
Samuel J. Robertson ◽  
Paul B. Gastin
Keyword(s):  
Energy Expenditure ◽  
Global Positioning System ◽  
Tracking System ◽  
Exercise Session ◽  
Gps Tracking ◽  
Accurate Estimation ◽  
Positioning System ◽  
Metabolic Power ◽  
Global Positioning ◽  
Global Positioning System Tracking

The purpose of this study was to assess the validity of a global positioning system (GPS) tracking system to estimate energy expenditure (EE) during exercise and field-sport locomotor movements. Twenty-seven participants each completed a 90-min exercise session on an outdoor synthetic futsal pitch. During the exercise session, they wore a 5-Hz GPS unit interpolated to 15 Hz and a portable gas analyzer that acted as the criterion measure of EE. The exercise session was composed of alternating 5-minute exercise bouts of randomized walking, jogging, running, or a field-sport circuit (×3) followed by 10 min of recovery. One-way analysis of variance showed significant (P < .01) and very large underestimations between GPS metabolic power– derived EE and oxygen-consumption (VO2) -derived EE for all field-sport circuits (% difference ≈ –44%). No differences in EE were observed for the jog (7.8%) and run (4.8%), whereas very large overestimations were found for the walk (43.0%). The GPS metabolic power EE over the entire 90-min session was significantly lower (P < .01) than the VO2 EE, resulting in a moderate underestimation overall (–19%). The results of this study suggest that a GPS tracking system using the metabolic power model of EE does not accurately estimate EE in field-sport movements or over an exercise session consisting of mixed locomotor activities interspersed with recovery periods; however, is it able to provide a reasonably accurate estimation of EE during continuous jogging and running.

scholarly journals Physical Activity Measured Using Global Positioning System Tracking in Non–Small Cell Lung Cancer

2014 ◽  
Vol 13 (6) ◽  
pp. 482-492 ◽  
Author(s):  
Catherine L. Granger ◽  
Linda Denehy ◽  
Christine F. McDonald ◽  
Louis Irving ◽  
Ross A. Clark
Keyword(s):  
Physical Activity ◽  
Lung Cancer ◽  
Global Positioning System ◽  
Small Cell ◽  
Gps Tracking ◽  
Positioning System ◽  
Healthy Individuals ◽  
Small Cell Lung ◽  
Global Positioning ◽  
Global Positioning System Tracking

Introduction. Increasingly physical activity (PA) is being recognized as an important outcome in non–small cell lung cancer (NSCLC). We investigated PA using novel global positioning system (GPS) tracking individuals with NSCLC and a group of similar-aged healthy individuals. Methods. A prospective cross-sectional multicenter study. Fifty individuals with NSCLC from 3 Australian tertiary hospitals and 35 similar-aged healthy individuals without cancer were included. Individuals with NSCLC were assessed pretreatment. Primary measures were triaxial accelerometery (steps/day) and GPS tracking (outdoor PA behavior). Secondary measures were questionnaires assessing depression, motivation to exercise, and environmental barriers to PA. Between-group comparisons were analyzed using analysis of covariance. Results. Individuals with NSCLC engaged in significantly less PA than similar-aged healthy individuals (mean difference 2363 steps/day, P = .007) and had higher levels of depression ( P = .027) and lower motivation to exercise ( P = .001). Daily outdoor walking time ( P = .874) and distance travelled away from home ( P = .883) were not different between groups. Individuals with NSCLC spent less time outdoors in their local neighborhood area ( P < .001). A greater number of steps per day was seen in patients who were less depressed ( r = .39) or had better access to nonresidential destinations such as shopping centers ( r = .25). Conclusion. Global positioning system tracking appears to be a feasible methodology for adult cancer patients and holds promise for use in future studies investigating PA and or lifestyle behaviors.

scholarly journals Variations of Accelerometer and Metabolic Power Global Positioning System Variables across a Soccer Season: A Within-Group Study for Starters and Non-Starters

2021 ◽  
Vol 11 (15) ◽  
pp. 6747
Author(s):  
Hadi Nobari ◽  
Rafael Oliveira ◽  
Marefat Siahkouhian ◽  
Jorge Pérez-Gómez ◽  
Florin Cazan ◽  
...  
Keyword(s):  
Global Positioning System ◽  
Soccer Players ◽  
Positioning System ◽  
Metabolic Power ◽  
Early Season ◽  
Professional Soccer ◽  
Global Positioning ◽  
Lower Load ◽  
System Variables ◽  
In The Beginning

The aims of this study were to analyze the within-group weekly metabolic power average (wMPA), weekly acceleration zones (wAcZ), and weekly deceleration zones (wDcZ), in starter and non-starter professional soccer players, based on different periods of the full season (pre-, early-, mid-, and end-season). Twenty-one professional soccer players (age, 28.3 ± 3.8 years; height, 181.2 ± 7.1 cm; body mass, 74.5 ± 7.7 kg; BMI, 22.6 ± 1.0 kg·m2) were monitored during the full season in the highest level of the Iranian Premier League. WMPA, wAcZ, and wDcZ at three different zones (wAcZ1, wAcZ2, wAcZ3, wDcZ1, wDcZ2, wDcZ3) were collected using Global Positioning System. ANOVA was applied to analyze within-group changes across the different periods of the full season. In general, starters presented higher values in the beginning of the season (pre- and early-season) and lower values at mid- and end-season. Specifically, starters showed significant differences in early- vs. mid-season for wMPA, wAcZ1, and wDcZ1 (p < 0.05), plus early- vs. end-season for wMPA and wAcZ1 (p < 0.01). In addition, non-starters showed higher values in the pre-season that decreased until the end-season for wMPA, wAcZ1, and wDcZ1. Regarding wAcZ2, wDcZ2, wAcZ3, and wDcZ3, non-starters presented higher values in early-season that decreased until the end-season. Specifically, non-starters showed significant differences in pre- vs. mid-season for wMPA, wAcZ1, and wDcZ1; pre- vs. end-season for wMPA, wDcZ1, wDccZ2, and wDcZ3; early- vs. mid-season for wMPA, wAcZ1, wDcZ1, wAcZ2, and wDccZ2; early- vs. end-season for wMPA, wAcZ1, wDcZ1, wAcZ2 wDccZ2, wAcZ3, and wDcZ3; and mid- vs. end-season for wMPA, wAcZ1, and wAcZ3 (p < 0.05). In conclusion, starters were revealed to have higher values in pre- and early-season, and lower values in mid- to end-season, while non-starters were revealed to have lower load values in pre- and end-season and higher load values in early- and mid-season. This study provides extra insights over the season for starters and non-starters, respectively. Data can be used by coaches to better training periodization across soccer season.

scholarly journals High-Intensity Demands of 6-a-Side Small-Sided Games and 11-a-Side Matches in Youth Soccer Players

2019 ◽  
Vol 31 (1) ◽  
pp. 85-90
Author(s):  
Heita Goto ◽  
James A. King
Keyword(s):  
Global Positioning System ◽  
High Intensity ◽  
Soccer Players ◽  
Positioning System ◽  
Metabolic Power ◽  
Youth Soccer ◽  
Total Distance ◽  
Global Positioning

Purpose: The purposes of the present study were to examine high-intensity running distance during 6-a-side small-sided games (SSGs) and 11-a-side matches (11M) in youth soccer players using speed and metabolic power approaches and the magnitude of difference between the high-intensity running distance calculated with the 2 approaches. Method: A total of 11 outfield players (age = 16.3 [0.6] y) performed SSGs with 3 pitch sizes (small SSG [SSGS], medium SSG, and large SSG [SSGL]) and 11M. A Global Positioning System (15 Hz) was employed to calculate total distance covered, distance covered at a speed ≥4.3 m·s−1 (TS), and metabolic power of ≥20 W·kg−1 (TP). Results: The total distance covered increased from SSGS through to SSGL (P < .001) and was greater during 11M and SSGL compared with other SSGs (P < .01). TS and TP increased from SSGS (TS vs TP = 98 [55] vs 547 [181] m) through to SSGL (538 [167] vs 1050 [234] m; P < .001). TS and TP during 11M (370 [122] vs 869 [233] m) was greater than SSGS (P < .001 for both) and less than SSGL (P < .05 for both). The magnitude of difference between TS and TP (as a percentage) was lower with an increase in pitch size during SSGs and was greater in SSGS (615% [404%]; P < .001), medium SSG (195% [76%]; P < .05), and smaller in SSGL (102% [33%]; P < .01) compared with 11M (145% [53%]). Conclusion: SSGs can replicate the high-intensity demands of 11M and the speed approach underestimates the high-intensity demands of SSGs and 11M compared with the metabolic power approach.

scholarly journals Quadcopter-Based Rapid Response First-Aid Unit with Live Video Monitoring

Drones ◽  
2019 ◽  
Vol 3 (2) ◽  
pp. 37 ◽  
Author(s):  
Rizwan ◽  
Shehzad ◽  
Awais
Keyword(s):  
Global Positioning System ◽  
Tracking System ◽  
First Aid ◽  
Base Station ◽  
Rapid Response ◽  
Air Transport ◽  
Head Tracking ◽  
Positioning System ◽  
Global Positioning ◽  
Collision Avoidance System

Air transport is the fastest way to reach areas with no direct land routes for ambulances. This paper presents the development of a quadcopter-based rapid response unit in an efficient aerial aid system to eliminate the delay time for first aid supplies. The system comprises a health monitoring and calling system for a field person working in open areas and a base station with the quadcopter. In an uncertain situation, the quadcopter is deployed from the base station towards the field person for immediate help through the specified path using constant Global System for Mobile (GSM)- and Global Positioning System (GPS)-based connections. The entire operation can be monitored at the base station with a Virtual Reality (VR) head-tracking system supported by a smartphone. The camera installed on the quadcopter is synchronized with the operator’s head movement while wearing a VR head-tracking system at the base station. Moreover, an Infrared (IR)-based obstacle-evasion model is implemented separately to explain the working of the autonomous collision-avoidance system. The system was tested, which confirmed the reduction in the response time to supply aid to the desired locations.

scholarly journals Complex Terrain Load Carriage Energy Expenditure Estimation Using Global Positioning System Devices

2018 ◽  
Vol 50 (10) ◽  
pp. 2145-2149 ◽  
Author(s):  
ADAM W. POTTER ◽  
WILLIAM R. SANTEE ◽  
STEPHEN P. MULLEN ◽  
ANTHONY J. KARIS ◽  
LAURIE A. BLANCHARD ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
Global Positioning System ◽  
Complex Terrain ◽  
Load Carriage ◽  
Positioning System ◽  
Global Positioning

Pediatric Tuberculosis and a Unique Method of Case Finding and Default Prevention: The Case of Baby ‘Lucky’, Moyale Sub-County, Kenya, 2019

2020 ◽  
Vol 66 (5) ◽  
pp. 553-555
Author(s):  
Dahabo Adi Galgallo ◽  
Ibrahim Lio ◽  
Adano Kochi ◽  
Dennis Kalikidane Mutiga CCE ◽  
James Ransom
Keyword(s):  
Global Positioning System ◽  
Male Infant ◽  
Case Finding ◽  
Positioning System ◽  
Extra Pulmonary Tuberculosis ◽  
Global Positioning ◽  
Unique Method ◽  
Global Positioning System Tracking ◽  
Pediatric Tuberculosis ◽  
Default Prevention

Abstract We report the case of a 9-month-old male infant diagnosed in the field with extra-pulmonary tuberculosis (TB). Use of innovative global positioning system tracking of pregnant pastoralist women allowed staff to find the mother, locate the infant and enroll the infant in care and treatment. Due to this innovative intervention of case finding and tracking, the infant was prevented from defaulting and completed his anti-TB regimen.

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