Monitoring Players’ Readiness Using Predicted Heart-Rate Responses to Soccer Drills

2018 ◽  
Vol 13 (10) ◽  
pp. 1273-1280 ◽  
Author(s):  
Mathieu Lacome ◽  
Ben Simpson ◽  
Nick Broad ◽  
Martin Buchheit
Keyword(s):  
Heart Rate ◽  
Global Positioning System ◽  
Daily Basis ◽  
Internal Load ◽  
Individual Level ◽  
Multiple Stepwise Regression Analysis ◽  
Global Positioning ◽  
Fitness Criterion ◽  
The Difference ◽  
The Individual

Purpose: To examine the ability of multivariate models to predict the heart-rate (HR) responses to some specific training drills from various global positioning system (GPS) variables and to examine the usefulness of the difference in predicted vs actual HR responses as an index of fitness or readiness to perform. Method: All data were collected during 1 season (2016–17) with players’ soccer activity recorded using 5-Hz GPS and internal load monitored using HR. GPS and HR data were analyzed during typical small-sided games and a 4-min standardized submaximal run (12 km·h−1). A multiple stepwise regression analysis was used to identify which combinations of GPS variables showed the largest correlations with HR responses at the individual level (HRACT, 149 [46] GPS/HR pairs per player) and was further used to predict HR during individual drills (HRPRED). Then, HR predicted was compared with actual HR to compute an index of fitness or readiness to perform (HRΔ, %). The validity of HRΔ was examined while comparing changes in HRΔ with the changes in HR responses to a submaximal run (HRRUN, fitness criterion) and as a function of the different phases of the season (with fitness being expected to increase after the preseason). Results: HRPRED was very largely correlated with HRACT (r = .78 [.04]). Within-player changes in HRΔ were largely correlated with within-player changes in HRRUN (r = .66, .50–.82). HRΔ very likely decreased from July (3.1% [2.0%]) to August (0.8% [2.2%]) and most likely decreased further in September (−1.5% [2.1%]). Conclusions: HRΔ is a valid variable to monitor elite soccer players’ fitness and allows fitness monitoring on a daily basis during normal practice, decreasing the need for formal testing.

Running exposure is associated with the risk of hamstring strain injury in elite Australian footballers

2016 ◽  
Vol 52 (14) ◽  
pp. 919-928 ◽  
Author(s):  
Joshua D Ruddy ◽  
Christopher W Pollard ◽  
Ryan G Timmins ◽  
Morgan D Williams ◽  
Anthony J Shield ◽  
...  
Keyword(s):  
Global Positioning System ◽  
Characteristic Curve ◽  
Training Session ◽  
Area Under The Curve ◽  
Receiver Operator Characteristic Curve ◽  
Predictive Capacity ◽  
Individual Level ◽  
Hamstring Strain ◽  
Global Positioning ◽  
The Individual

BackgroundTo investigate the association between running exposure and the risk of hamstring strain injury (HSI) in elite Australian footballers.MethodsElite Australian footballers (n=220) from 5 different teams participated. Global positioning system (GPS) data were provided for every athlete for each training session and match for the entire 2015 season. The occurrences of HSIs throughout the study period were reported. Receiver operator characteristic curve analyses were performed and the relative risk (RR) of subsequent HSI was calculated for absolute and relative running exposure variables related to distance covered above 10 and 24 km/hour in the preceding week/s.Results30 prospective HSIs occurred. For the absolute running exposure variables, weekly distance covered above 24 km/hour (>653 m, RR=3.4, 95% CI 1.6 to 7.2, sensitivity=0.52, specificity=0.76, area under the curve (AUC)=0.63) had the largest influence on the risk of HSI in the following week. For the relative running exposure variables, distance covered above 24 km/hour as a percentage of distance covered above 10 km/hour (>2.5%, RR=6.3, 95% CI 1.5 to 26.7, sensitivity=0.93, specificity=0.34, AUC=0.63) had the largest influence on the risk of HSI in the following week. Despite significant increases in the RR of HSI, the predictive capacity of these variables was limited.ConclusionsAn association exists between absolute and relative running exposure variables and elite Australian footballers' risk of subsequent HSI, with the association strongest when examining data within 7–14 days. Despite this, the use of running exposure variables displayed limited clinical utility to predict HSI at the individual level.

scholarly journals Differences in Sickness Allowance Receipt between Swedish Speakers and Finnish Speakers in Finland

2017 ◽  
Vol 52 ◽  
pp. 43-58 ◽  
Author(s):  
Kaarina S. Reini ◽  
Jan Saarela
Keyword(s):  
Regression Models ◽  
Health Condition ◽  
Logistic Regression Models ◽  
Individual Level ◽  
Objective Health ◽  
Language Groups ◽  
Health Measure ◽  
All Cause Mortality ◽  
The Difference ◽  
The Individual

Previous research has documented lower disability retirement and mortality rates of Swedish speakers as compared with Finnish speakers in Finland. This paper is the first to compare the two language groups with regard to the receipt of sickness allowance, which is an objective health measure that reflects a less severe poor health condition. Register-based data covering the years 1988-2011 are used. We estimate logistic regression models with generalized estimating equations to account for repeated observations at the individual level. We find that Swedish-speaking men have approximately 30 percent lower odds of receiving sickness allowance than Finnish-speaking men, whereas the difference in women is about 15 percent. In correspondence with previous research on all-cause mortality at working ages, we find no language-group difference in sickness allowance receipt in the socially most successful subgroup of the population.

Energy cost of cows' grazing activity: Use of the heart rate method and the Global Positioning System for direct field estimation1

2006 ◽  
Vol 84 (7) ◽  
pp. 1951-1967 ◽  
Author(s):  
A. Brosh ◽  
Z. Henkin ◽  
E. D. Ungar ◽  
A. Dolev ◽  
A. Orlov ◽  
...  
Keyword(s):  
Heart Rate ◽  
Global Positioning System ◽  
Energy Cost ◽  
Positioning System ◽  
Global Positioning ◽  
Rate Method

Workplace Location and ICTs Substituting Travel

2010 ◽  
pp. 205-225 ◽  
Author(s):  
Greger Henriksson ◽  
Minna Räsänen
Keyword(s):  
Case Studies ◽  
Environmental Sustainability ◽  
Relevant Literature ◽  
Social Practices ◽  
Time Service ◽  
Individual Level ◽  
The Difference ◽  
The Individual ◽  
Relations Of Power ◽  
Shed Light

This chapter is based on the assumption that keeping the number and length of business and commuting trips at reasonable levels could contribute to reaching targets of environmental sustainability. The authors highlight a couple of options for reducing or avoiding business trips and commuting through workplace location or improved use of communications. They present case studies concerning travel and communications, carried out by using diaries and interviews. They also present relevant literature on social practices and sustainability goals in relation to use of ICT. The aim is to shed light on variation in the use of travel and communications on an individual level in work life. The case studies illustrate that such variation is mainly due to the concrete practices involved in execution of professional duties and roles. Duties that involve a clearly defined end result or product being delivered regularly by the member of staff are correlated to clearly defined needs for communications. Less clearly defined end results of the work duties seem to make it harder for the individual to plan and perform communication and travel in a more energy saving way. The difference in professional duties can thus be expressed in terms of clarity and maturity. Another factor that affect who can replace travel with ICTs is relations of power, e.g., when a purchaser dictates the terms for a subcontractor concerning how and where to “deliver” his working time, service or product. The importance of clarity, maturity and power aspects means that professional practices need to be studied at a detailed level to find out who could substitute ICTs for travel and how this could be done.

scholarly journals Modeling the signature of a transponder in altimeter return data and determination of the reflection surface of the ice cap near the GRIP camp, Greenland

1998 ◽  
Vol 44 (148) ◽  
pp. 625-633
Author(s):  
G. Haardenog-Pedersen ◽  
K. Keller ◽  
C. C. Tscherning ◽  
N. Gundestrup
Keyword(s):  
Global Positioning System ◽  
Propagation Delay ◽  
Radar Altimeter ◽  
Reflection Point ◽  
Ice Cap ◽  
Global Positioning ◽  
Satellite Radar ◽  
The Difference ◽  
Satellite Radar Altimetry

AbstractUsing an active transponder with the ERS-I and ERS-2 radar altimeters, the distance to the satellite was measured at a location close to the GRIP site, Greenland, at an altitude of 3.2 km. The measurement was executed while the transponder was in the “ice-tracking mode”. It includes a bias due to the propagation delay. The location of the transponder was determined using the global positioning system.The transponder signal was modeled and the distance from the altimeter to the effective reflection point of the transponder was determined. Since the transponder was located within 1 km of the ground tracks, the measurement was corrected for this offset. A correction was also done for the surface slope, resulting in the distance (plus bias) to the closest sub-satellite point on the surface of the (compact) snow.The transponder signal was then removed from the radar altimeter waveform, enabling the determination of the distance (plus bias from the altimeter to the first reflective surface within the snow. The différence between this distance and that obtained using the transponder was < 2 m. This shows that the surface which gives rise to the first return of the reflection agrees with the surface of the (compact, dry) snow at this high-altitude location. This is an important result to be used when studying ice-cap topography using satellite radar altimetry.

scholarly journals Creativity Versus Innovativeness: Exploring the Differences between the Two Constructs May Lead to Greater Innovation in Large Firms

2015 ◽  
Vol 10 (11) ◽  
pp. 83 ◽  
Author(s):  
John Cocco ◽  
Majdi Quttainah
Keyword(s):  
Motivational Orientation ◽  
Individual Level ◽  
Sustained Competitive Advantage ◽  
Starting Point ◽  
Seeking Behavior ◽  
Study Support ◽  
The Difference ◽  
Primary Focus ◽  
The Individual ◽  
The Right

<p>Several individuals from top management seem to be confused about the difference between creativity and innovativeness. Amabile (1997) suggests that while innovation begins with creative ideas, creativity by individuals and teams is only a starting point for innovation. Individual creativity is necessary but not sufficient to yield breakthrough innovation in organizations. This can sometimes cause confusion in employee development efforts and actions taken by management. Companies often look for ways to hire and retain creative employees and at the same time they are also interested in establishing a creative environment for knowledge workers… but should creativity be the primary focus? These firms hope that creativity enhancing steps will eventually lead to greater innovation and therefore help it to achieve sustained competitive advantage. This paper attempts to demonstrate that there are potentially other dimensions beyond creativity related to innovativeness, which should be considered at the individual level in order to foster innovation in firms. Empirical results in this study support the idea that intrinsic motivational orientation, sociability and political astuteness are enhancers to employee innovativeness while perfection seeking behavior detracts employee innovativeness. These findings may serve to extend Amabile’s (1997) componential framework to center on the “innovativeness” construct versus creativity to help explain how firms need to hire, cultivate and retain the right talent.</p>

scholarly journals Cross-Cultural Variations in Extreme Rejecting and Extreme Affirming Response Styles

2019 ◽  
Vol 50 (8) ◽  
pp. 955-971 ◽  
Author(s):  
Tieyuan Guo ◽  
Roy Spina
Keyword(s):  
Cultural Differences ◽  
Cross Cultural ◽  
Response Style ◽  
Response Styles ◽  
Cultural Variation ◽  
Cultural Variations ◽  
Individual Level ◽  
Country Level ◽  
The Difference ◽  
The Individual

Previous research has discussed cultural differences in moderacy vs extremity response styles. The present research found that cultural differences in response styles were more complex than previously speculated. We investigated cross-cultural variations in extreme rejecting versus affirming response biases. Although research has indicated that overall Chinese have less extreme responses than Westerners, the difference may be mainly driven by extreme rejecting responses because respondents consider answering survey questions as a way of interacting with researchers, and extreme rejecting responses may disrupt harmony in relationships, which is valued more in Chinese collectivistic culture than in Western individualistic cultures. Studies 1 and 2 revealed that Chinese had less extreme rejecting response style than did British, whereas they did not differ in extreme affirming response style. Study 2 further revealed that the cross-cultural asymmetry in extreme rejecting versus affirming response styles was partially accounted for by individualism orientation at the individual level. Consistently, Study 3 revealed that at the country level, individualism was positively associated with extreme rejecting response style, but was not associated with extreme affirming response style, suggesting that individualism accounted for the asymmetric cultural variation in extreme rejecting versus affirming response styles.

scholarly journals Effects of Small-Sided Soccer Games on Internal and External Load and Lower Limb Power: A Pilot Study in Collegiate Players

2017 ◽  
Vol 18 (1) ◽  
Author(s):  
Filipe Manuel Clemente ◽  
Pantelis Theodoros Nikolaidis ◽  
Cornelis M. I. Niels Van Der Linden ◽  
Bruno Silva
Keyword(s):  
Global Positioning System ◽  
Lower Limb ◽  
Repeated Measures ◽  
External Load ◽  
Perceived Exertion ◽  
Internal Load ◽  
Squat Jump ◽  
Global Positioning ◽  
System Variables ◽  
Physical Responses

AbstractPurpose. The aim of the study was to examine the influence of small-sided and conditioned games (SSG) on the internal load (heart rate [HR] and perceived exertion), external load (Global Positioning System variables), and lower limb power (squat jump [SJ] and countermovement jump [CMJ]).Methods. Six collegiate male soccer players (age 20.3 ± 4.8 years; maximal oxygen uptake 42.9 ± 2.7 ml/kg/min; maximal HR 184.7 bpm) performed three 2-min bouts of 1 vs. 1 and two 3-min bouts of 3 vs. 3 format with a work-to-rest ratio of 1:1.5. Two-way ANOVA with repeated measures tested the effects of bouts and SSG formats on the internal and external load and on the lower limb power.Results. The 3Conclusions. Physiological and physical responses varied during bouts. Nevertheless, small differences between SSG formats were found. SSG bouts did not have significant impact on the lower limb power.

scholarly journals Perception against COVID-19 Threat Affecting the Behavior of Indonesia People Three Months after the Outbreak

2020 ◽  
Vol 8 (T1) ◽  
pp. 459-464
Author(s):  
Putri C. Eyanoer ◽  
Farhat Farhat ◽  
Elvita Rahmi Daulay ◽  
Fotarisman Zaluchu
Keyword(s):  
Cross Sectional Study ◽  
Chi Square ◽  
Cross Sectional ◽  
Individual Level ◽  
Chi Square Test ◽  
Study Population ◽  
The Difference ◽  
The Government ◽  
The Individual ◽  
Actual Health

BACKGROUND: In Indonesia, a new behavior has been introduced in the community to prevent COVID-19 transmission following 3 months of the COVID-19 outbreak. The Ministry of Health, Republic of Indonesia, names this new concept as “the adaptation of new behavior.” However, preventive measures and health protocols encouraged by the government have not yet yielded a significant impact on reducing the COVID-19 positivity rate. This unsuccessful outcome indicates that infective circulation is still occurring caused by incompliant to the health protocol. AIM: This study aimed to measure community perceptions against COVID-19 at the individual level. METHODS: A cross-sectional study with a total of 1687 respondents was performed. Questionnaires distributed thru sharing online links which contain questions on perception of vulnerability and severity of COVID-19. Chi-square test used in analysis to determine the difference in perception with respondents’ behavior. RESULTS: A total of 81.7% of respondents who had a perception of “susceptible to contract” performed behavior suited to recommendations and 81.2% study population had a perception of “COVID-19 is severe” executed behavior suited to the recommendation. CONCLUSION: This study demonstrated the establishment of government recommendations for COVID-19 infection did not guarantee the actual health practice/behavior in the community. The existing misconception of the perspective of seriousness/severity and susceptibility would prevent the country from flattening the curve.

scholarly journals Comparative study of accuracy of differential global positioning system (DGPS) and total station instruments

2021 ◽  
pp. 49-58
Author(s):  
Didigwu Augustus Ugonna Sunday ◽  
Ogbe David .O
Keyword(s):  
Global Positioning System ◽  
Positioning System ◽  
Total Station ◽  
The Earth ◽  
Optical Distance ◽  
Reflected Light ◽  
Global Positioning ◽  
Similar Survey ◽  
The Difference ◽  
Land Using

Total Station and Global Positioning System (GPS) are two instruments used to fix position on the earth. The total station employs electro-optical distance meter method, emitting laser beams to a target and detecting light reflected off it by measuring the deviation of the wavelength of the reflected light. Global Positioning System (GPS) is a space-based satellite for rapid position determination, its’ receiver calculates its position by precisely turning the signal sent by GPS satellite high above the earth. The study aims at the assessment of the two instruments: GPS and Total Station. To achieve this aim, two surveys were performed on the same parcel of land using the two instruments. In the first part of the survey, a closed-loop traverse was performed around a chosen parcel of land using a calibrated total station. The station determined only coordinates of points from where bearings and distances were extracted. Thereafter, DGPS equipment was then used to perform a similar survey as the total station. In this case, visible satellites were used to determine the coordinates of all the stations. The results of the two methods present the distances, bearings, and coordinates. The difference between each of the results was also analyzed. Thus the maximum average difference in distance of 5mm occurred throughout the chainage and maximum differences in the coordinate of 12mm Easting and 9mm Northing were found where there are tree covers. However, the study shows that even though the two instruments are good tools for positioning, each exhibited it’s own accuracy, efficiency, advantages and disadvantage.

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