scholarly journals Physiological and Notational Comparison of New and Old Scoring Systems of Singles Matches in Men's Badminton

2011 ◽  
Vol 17 (1) ◽  
pp. 6-17 ◽  
Author(s):  
Hsin Lian CHEN ◽  
Chang Jun WU ◽  
Trevor C. CHEN
Keyword(s):  
Perceived Exertion ◽  
Physiological Responses ◽  
Scoring Systems ◽  
Physiological Data ◽  
Systematic Observation ◽  
Time Frequency ◽  
Two Systems ◽  
Playing Time ◽  
Lactate Levels ◽  
New System

LANGUAGE NOTE | Document text in English; abstract also in Chinese. This study compared the physiological responses and shot selection preferences of male singles players between thenew (rally-point) and old (scoring-by-service) scoring systems. Ten male athletes each played two matches against the same opponent on different days using the lottery method. Matches were notated using a systematic observation instrument, and physiological data were measured using heart rate (HR), ratings of perceived exertion (RPE) and blood lactate levels (LA). Results showed no differences in peak HR, RPE or LA responses between the two systems. However, players spent more time at an HR greater than 90%HRpeak under the old system (63%) than under the new system (54%). Notational analysis demonstrated a significant decrease in total match playing time (PT: 29 min), work time (10 min), work density (0.57), rest time (18 min), effective playing time (36%), number of rallies (203) and serves (35) under the new system as compared to the old system (e.g. PT: 42 min). No significant differences were noted between the two systems for number of shots, rally time, stroke time, frequency distribution of shot selection and positions during the matches, and for shot methods on the last shot of each rally. These findings suggest that the new system can significantly shorten PT compared to the old system, and that physiological responses, shot selection and positions do not affect between the systems. Meanwhile, the greater proportion of time spent at higher HR intensities under the old system may be attributed to the longer playing time with the opponent. 本研究目的，針對「新(落地得分)、舊制(發球得分)羽球單打比賽時之生理反應和擊球方式」做比較。以羽球正式比賽抽籤方式讓10位大學男子甲組羽球選手，決定其各二場新、舊制羽球單打比賽同一位對手之方式。以高速攝影機拍攝每場比賽做為系統性觀察法之內容分析，並在每場比賽時測驗心跳率 (HR)、運動自覺量表(RPE)和血乳酸濃度 (LA)做為生理反應的評估指標。結果顯示，羽球新、舊制比賽間引起心跳率峰值 (HRpeak)、RPE或血乳酸上升的反應並無統計差異。然而，舊制比賽時>90%HRpeak強度的比率(63%)明顯比新制 (54%)來得多。新制比賽的整場比賽完成時間 (PT：29分鐘)、淨比賽時間 (10分鐘)、運動密度 (0.57)、休息時間 (18分鐘)、比賽時間效益 (36%)、每球來回完成次數 (203)及發球次數 (35)都明顯比舊制 (例 如PT：42分鐘)縮短，但二種不同比賽間在揮拍次數、每球來回完成時間、擊球時間、擊球方式、擊球位置及每球最後一拍的擊球方式均無統計差異。這些結果顯示，新賽制規則改變會比舊賽制明顯縮短比賽時間，但不同賽制間所引起的生理反應、擊球方式及位置則不因規則改變而受到影響。此外，舊賽制比新賽制出現較高心跳率分佈情形，可歸因於舊制比賽之雙方選手有較多對抗機會或較長比賽時間所造成的。

scholarly journals Physiological responses and match characteristics in professional tennis players during a one-hour simulated tennis match

2016 ◽  
Vol 51 (1) ◽  
pp. 83-92 ◽  
Author(s):  
Bülent Kilit ◽  
Ömer Şenel ◽  
Erşan Arslan ◽  
Sema Can
Keyword(s):  
Heart Rate ◽  
Perceived Exertion ◽  
Physiological Responses ◽  
Pulmonary Ventilation ◽  
Body Height ◽  
Ratings Of Perceived Exertion ◽  
Tennis Players ◽  
Rest Time ◽  
Playing Time ◽  
Tennis Match

Abstract The purpose of this study was to investigate the effects of serve and return game situations on physiological responses and match characteristics in professional male tennis players during one hour-long simulated singles tennis matches. Ten internationally ranked tennis players (age 22.2 ± 2.8 years; body height 180.7 ± 4.4 cm; body mass 75.9 ± 8.9 kg) participated in this study. Their physiological responses were measured using two portable analyzers during indoor hard court matches. Ratings of perceived exertion were also determined at the end of the game. The variables describing the characteristics of the matches determined from video recordings were: (a) duration of rallies; (b) rest time; (c) work-to-rest ratio; (d) effective playing time; and (d) strokes per rally. Significant differences (p<0.05) were found between serving and returning conditions in an hour-long simulated singles tennis match in terms of oxygen uptake, a heart rate, ratings of perceived exertion, pulmonary ventilation, respiration frequency and a respiratory gas exchange ratio. In addition, both the heart rate and ratings of perceived exertion responses were moderately correlated with the duration of rallies and strokes per rally (r = 0.60 to 0.26; p<0.05). Taken together, these results indicate that the serve game situation has a significant effect on the physiological response in an hour-long simulated tennis match between professional male tennis players. These findings might be used for the physiological adaptations required for tennis-specific aerobic endurance.

Behavioural and physiological responses to simulated predator-induced stress in the eastern box turtle, Terrapene carolina carolina

2020 ◽  
Vol 41 (3) ◽  
pp. 387-398
Author(s):  
Victoria L. Preston ◽  
Jessica M. Vannatta ◽  
Matthew Klukowski
Keyword(s):  
Physiological Responses ◽  
Plasma Corticosterone ◽  
Seasonal Effects ◽  
Graded Response ◽  
Box Turtles ◽  
Eastern Box Turtles ◽  
Lactate Levels ◽  
Terrapene Carolina Carolina ◽  
Almost All ◽  
Free Ranging

Abstract In spite of the fully-hinged shell being the defining characteristic of box turtles, few studies have quantified the behavioural use of the shell in response to predator encounters. While it is often assumed that box turtles simply withdraw into their shell in response to threats, we expected variability among individuals in shell usage and in the degree of head and limb retraction because withdrawal is likely to be costly. We tested the behavioural and physiological responses of free-ranging eastern box turtles to stimuli of varying intensity: observation only, a visual stimulus, a poke on the leg, or a pinch on the leg before being flipped. The more intense the simulated predatory stimulus, the more likely turtles were to fully close their shell. However, stimulus intensity did not affect plasma corticosterone or lactate levels. This may be due to too brief or weak of a stimulus, increased parasympathetic activity, or seasonal effects. Upon capture and during handling, almost all turtles withdrew into their shells and closed their anterior plastron, although fewer closed their posterior plastron, and a few engaged in other behaviours such as biting and urinating. Older, larger turtles were able to close their shells with greater strength than younger and smaller turtles. Our results indicate that in spite of their fully closable shell, box turtles exhibit a graded response to perceived threats. This suggests that full closure of the shell is likely to be costly and occurs only in response to the most intense stimuli.

Mapping the urban environment using real-time physiological monitoring

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Dimitra Dritsa ◽  
Nimish Biloria
Keyword(s):  
Data Collection ◽  
Conceptual Model ◽  
Urban Environment ◽  
Physiological Responses ◽  
Physiological Data ◽  
Contextual Data ◽  
Content Type ◽  
The Relationship ◽  
The City ◽  
Urban Stress

PurposeThis paper presents a critical review of studies which map the urban environment using continuous physiological data collection. A conceptual model is consequently presented for mitigating urban stress at the city and the user level.Design/methodology/approachThe study reviews relevant publications, examining the tools used for data collection and the methods used for data analysis and data fusion. The relationship between urban features and physiological responses is also examined.FindingsThe review showed that the continuous monitoring of physiological data in the urban environment can be used for location-aware stress detection and urban emotion mapping. The combination of physiological and contextual data helps researchers understand how the urban environment affects the human body. The review indicated a relationship between some urban features (green, land use, traffic, isovist parameters) and physiological responses, though more research is needed to solidify the existence of the identified links. The review also identified many theoretical, methodological and practical issues which hinder further research in this area.Originality/valueWhile there is large potential in this field, there has been no review of studies which map continuously physiological data in the urban environment. This study covers this gap and introduces a novel conceptual model for mitigating urban stress.

A Pilot Study Comparing Physiological Responses of Phase III Cardiac Patients to Recumbent and Upright Exercise Using the RPE Scale

2005 ◽  
Vol 100 (2) ◽  
pp. 357-361 ◽  
Author(s):  
Meir Magal ◽  
Robert F. Zoeller
Keyword(s):  
Heart Rate ◽  
Pilot Study ◽  
Cardiac Rehabilitation ◽  
Perceived Exertion ◽  
Physiological Responses ◽  
Cardiac Patients ◽  
Phase Iii ◽  
Ratings Of Perceived Exertion ◽  
Physiological Differences ◽  
Stepping Exercise

Ratings of perceived exertion (RPE) are used for exercise programming of cardiac rehabilitation patients, whenever it is difficult to use heart rate to set intensity due to medication or other factors. This investigation examined the physiological responses to two stepping exercise modes (upright and recumbent) at the same RPE. Analysis indicated significant physiological differences between the modes of exercise which may be mediated by postural differences. Specifically, the physiological responses to the recumbent exercise, but not the upright exercise, had the expected relationship with RPE, with recumbent stepping requiring less physiological effort than the upright stepping at the same RPE. As such, we cannot recommend with confidence that the prescription for upright exercise be made based on data from recumbent exercise or vice-versa.

scholarly journals Development of reference equations for the six-minute walk distance of school-aged Nigerian children

2021 ◽  
Author(s):  
Peter Odion Ubuane ◽  
Olufunke Adewumi Ajiboye ◽  
Motunrayo Oluwabukola Adekunle ◽  
Ayodeji Olushola Akinola ◽  
Gbenga Akinyosoye ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Perceived Exertion ◽  
Rating Of Perceived Exertion ◽  
Physiological Data ◽  
Functional Evaluation ◽  
Walk Distance ◽  
Nigerian Children ◽  
Reference Equations ◽  
Minute Walk Distance ◽  
Minute Walk

BACKGROUND: The six-minute walk test (6MWT), a simple, reliable and valid test that uses the distance walked in six minutes (six-minute walk distance, 6MWD) to quantify functional exercise capacity, is widely used in chronic cardiopulmonary and non-cardiopulmonary disorders. However, th absence of reference standards for Nigerian school-aged children limits its utility in this age group OBJECTIVES: To develop normative values and equations for the 6MWT of school-aged Nigerian children METHODS: In a cross-sectional study, healthy Nigerian children aged 6-11 years in Lagos completed 6MWT on 20-meter straight outdoor courses in their schools following standardized guidelines. Potential predictors: demographic (age, sex), anthropometric (height, weight, chest circumference, leg length) and physiological data [pre-walk, immediate post-walk and 5th-minute post-walk heart rate (HR), oxygen saturation (SpO2), systolic blood pressure (SBP), diastolic blood pressure (DBP) and rating of perceived exertion (RPE)] and the difference between pre-walk and post-walk HR (HR change), SpO2 (SpO2 change), SBP (SBP change), DBP (DBP change) and RPE (RPE change). Primary outcomes:six-minute walk distance (6MWD) in meters. RESULTS: Overall, 627 pupils (52.1% girls) walked 504.6 (66.6) m (95% CI: 499.4, 509.8), ranging from 326.6 to 673.0 m; boys walking 16 m longer (p=0.002). Stepwise linear regression yielded 6MWD=347.9+14(Age in years)+1.6(HR change)+17.6(sex; male=1, female=0)+1.2(SBP change);R square=0.25.Previously published reference equations mostly over-estimated Nigerian children's 6MWD. CONCLUSION: The reference values and equations, after validation in other Nigerian geographic populations, may be useful for the functional evaluation of Nigerian children aged 6-11 years with chronic childhood disorders.

scholarly journals A Novel Approach to Safe Special Fitness Testing in Judo Players

2021 ◽  
Author(s):  
Wiesław Błach ◽  
Tadeusz Ambroży ◽  
Zbigniew Obmiński ◽  
Nikos Malliaronopoulos ◽  
Juliusz Migasiewicz ◽  
...  
Keyword(s):  
Heart Rate ◽  
Laboratory Tests ◽  
Physiological Responses ◽  
Injury Rate ◽  
Fitness Testing ◽  
Specific Exercise ◽  
Post Exercise ◽  
Novel Approach ◽  
Lactate Levels ◽  
Blood Lactate Levels

Abstract Background: Measurements of physical fitness indices obtained in laboratory tests using an ergometer or a treadmill are very accurate, but they involve selected groups of muscles and do not reproduce the structure of the sport-specific exercise in judo. For this reason, researchers seek for the tests that use movements similar to the characteristic offensive techniques used during competitions (i.e. throwing). The most commonly recommended is the seoi-nage throwing test, known as SJFT (special judo fitness test).The aim of the study was to develop a new test in which uke is replaced by a dummy, in order to reduce the injury rate and ensure the safety of the participants.Methods: During the 3-week period, competitors from different weight classes performed at the beginning and then after the 2-week period one 1-minute series of continual dummy throws using the o-goshi technique and the seoi-nage technique. Post-exercise physiological responses (heart rate [HR] and blood lactate levels [La]) were evaluated.Results: Significant improvements were reported in o-goshi performance level after the training period. Physiological responses to exercise did not change significantly after training sessions. On both measurement days, post-exercise La levels were similar for o-goshi and seoi-nage throws, whereas post-exercise HR was significantly greater after seoi-nage throws.Conclusions: The dummy throwing test can be a recommended alternative to uke throwing due to the elimination of the risk of injuries to practising athletes.

The Rise of Academic Innovationism

2018 ◽  
pp. 79-115
Author(s):  
Steven Brint
Keyword(s):  
Research Universities ◽  
Knowledge Exchange ◽  
Reciprocal Relations ◽  
Academic Innovation ◽  
The Future ◽  
Two Systems ◽  
Research And Education ◽  
New System

This chapter discusses the analytical contrast between the two systems for organizing research and education, the system of academic professionalism and the system of academic innovationism. Under the impetus of academic innovationism, universities became more porous to the outside world and reciprocal relations of knowledge exchange grew denser. On balance, the new system contributed significantly and positively to the research prowess of universities. But it has also yielded a spotty record—some extraordinary successes but also many short-lived, troubled collaborations. Some universities invested heavily in the infrastructure to foster academic innovation and had little to show for their investments. For research universities, the challenge for the future will be to expand the possibilities to contribute more to the national innovation effort.

Monitoring Workload in Elite Female Basketball Players During the In-Season Phase: Weekly Fluctuations and Effect of Playing Time

2019 ◽  
Vol 14 (7) ◽  
pp. 941-948 ◽  
Author(s):  
Henrikas Paulauskas ◽  
Rasa Kreivyte ◽  
Aaron T. Scanlan ◽  
Alexandre Moreira ◽  
Laimonas Siupsinskas ◽  
...  
Keyword(s):  
Perceived Exertion ◽  
Linear Models ◽  
Training Session ◽  
Rating Of Perceived Exertion ◽  
Basketball Players ◽  
Significant Difference ◽  
Women's Basketball ◽  
Playing Time ◽  
And Training ◽  
Basketball Teams

Purpose:To assess the weekly fluctuations in workload and differences in workload according to playing time in elite female basketball players.Methods:A total of 29 female basketball players (mean [SD] age 21 [5] y, stature 181 [7] cm, body mass 71 [7] kg, playing experience 12 [5] y) belonging to the 7 women’s basketball teams competing in the first-division Lithuanian Women’s Basketball League were recruited. Individualized training loads (TLs) and game loads (GLs) were assessed using the session rating of perceived exertion after each training session and game during the entire in-season phase (24 wk). Percentage changes in total weekly TL (weekly TL + GL), weekly TL, weekly GL, chronic workload, acute:chronic workload ratio, training monotony, and training strain were calculated. Mixed linear models were used to assess differences for each dependent variable, with playing time (low vs high) used as fixed factor and subject, week, and team as random factors.Results:The highest changes in total weekly TL, weekly TL, and acute:chronic workload ratio were evident in week 13 (47%, 120%, and 49%, respectively). Chronic workload showed weekly changes ≤10%, whereas monotony and training strain registered highest fluctuations in weeks 17 (34%) and 15 (59%), respectively. A statistically significant difference in GL was evident between players completing low and high playing times (P = .026, moderate), whereas no significant differences (P > .05) were found for all other dependent variables.Conclusions:Coaches of elite women’s basketball teams should monitor weekly changes in workload during the in-season phase to identify weeks that may predispose players to unwanted spikes and adjust player workload according to playing time.

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