scholarly journals An experimental feasibility study evaluating the adequacy of sportswear-type wearables for recording physical exercise intensity

2021 ◽  
Author(s):  
Yoshihiro Marutani ◽  
Shoji Konda ◽  
Issei Ogasawara ◽  
Keita Yamasaki ◽  
Teruki Yokoyama ◽  
...  
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Exercise Intensity ◽  
Regression Line ◽  
Coefficient Of Determination ◽  
Regression Analyses ◽  
High Coefficient ◽  
Axial Acceleration ◽  
Wide Range ◽  
Single Regression

Sportswear-type wearables with integrated inertial sensors and electrocardiogram (ECG) electrodes, have been developed. We examined the feasibility of using sportswear-type wearables to evaluate exercise intensity within a controlled laboratory setting. Six male college athletes were asked to don a sportswear-type wearable while performing a treadmill test that reached up to 20 km/h. The magnitude of the filtered tri-axial acceleration signal, recorded by the inertial sensor, was used to calculate the acceleration index. The R-R intervals of ECG were used to determine heart rate; the external validity of the heart rate was then evaluated according to oxygen uptake, which is the gold standard physiological exercise intensity. Single regression analyses between treadmill speed and the acceleration index in each participant showed that the slope of the regression line was significantly greater than zero with a high coefficient of determination (walking, 0.95; jogging, 0.96; running, 0.90). Another single regression analyses between heart rate and oxygen uptake showed that the slope of the regression line was significantly greater than zero, with a high coefficient of determination (0.96). Together, these results indicate that sportswear-type wearables are a feasible technology for evaluating physical and physiological exercise intensity across a wide range of physical activities and sport performances.

The relationship between oxygen uptake reserve and heart rate reserve is affected by intensity and duration during aerobic exercise at constant work rate

2011 ◽  
Vol 36 (6) ◽  
pp. 839-847 ◽  
Author(s):  
Felipe A. Cunha ◽  
Adrian W. Midgley ◽  
Walace D. Monteiro ◽  
Felipe K. Campos ◽  
Paulo T.V. Farinatti
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Exercise Testing ◽  
Exercise Intensity ◽  
Maximal Exercise ◽  
Work Rate ◽  
Heart Rate Reserve ◽  
Constant Work Rate ◽  
The Stability ◽  
The Relationship

The relationship between the percentage of heart rate reserve (%HRR) and percentage of oxygen uptake reserve (%VO2R) has been recommended for prescribing aerobic exercise intensity. However, this relationship was derived from progressive maximal exercise testing data, and the stability of the relationship during prolonged exercise at a constant work rate has not been established. The main aim of this study was to investigate the stability of the %VO2R–%HRR relationship during prolonged treadmill exercise bouts performed at 3 different constant work rates. Twenty-eight men performed 4 exercise tests: (i) a ramp-incremental maximal exercise test to determine maximal heart rate (HRmax) and maximal oxygen uptake (VO2max) and (ii) three 40-min exercise bouts at 60%, 70%, and 80% VO2R. HR and VO2 significantly increased over time and were influenced by exercise intensity (p < 0.001 and p = 0.004, respectively). A 1:1 relationship between %HRR and %VO2R, and between %HRR and %VO2max, was not observed, with mean differences of 8% (t = 5.2, p < 0.001) and 6% (t = 4.8, p < 0.001), respectively. The VO2 values predicted from the ACSM running equation were all significantly higher than the observed VO2 values (p < 0.001 for all comparisons), whereas a difference for HR was observed only for the tenth min of exercise at 80% VO2R (p = 0.041). In conclusion, the main finding of this study was that the %HRR–%VO2R relationship determined by linear regression, obtained from progressive maximal exercise testing, did not apply to prolonged treadmill running performed at 3 work rates.

Project Aquarius 10. Effects of Work, Weather, and Fire on the Energy Expenditure, Strain, and Productivity of Men Suppressing Wildland Fires

1997 ◽  
Vol 7 (2) ◽  
pp. 167 ◽  
Author(s):  
GM Budd ◽  
JR Brotherhood ◽  
AL Hendrie ◽  
SE Jeffery ◽  
FA Beasley ◽  
...  
Keyword(s):  
Heart Rate ◽  
Energy Expenditure ◽  
Regression Analyses ◽  
Deep Body Temperature ◽  
Hand Tool ◽  
Wide Range ◽  
Work Duration ◽  
Eucalypt Forests ◽  
Deep Body ◽  
Current Heat

Four crews of male firefighters were studied while they attempted to suppress well-developed experimental bushfires of intensities commonly faced by hand-tool crews, and also while they built fireline in the same way without fire, during three summers in Australian eucalypt forests. Multiple-regression analyses of their responses showed that they maintained their deep body temperature and heart rate at constant and sustainable levels over a wide range of work duration and intensity, and of heat from weather and fire that frequently exceeded the limits recommended in current heat-stress guidelines. Energy expenditure declined slightly with warmer weather and fire although not with rake duration. Productivity was unchanged by warmer weather but declined slightly with rake duration and with fire. The findings confirm the effectiveness of the firefighters' work practices that allowed them to set their own pace, and of their light, well ventilated clothing that permitted unrestricted evaporation of sweat.

scholarly journals Estimating peak oxygen uptake based on postexercise measurements in swimming

2016 ◽  
Vol 41 (6) ◽  
pp. 588-596 ◽  
Author(s):  
Diego Chaverri ◽  
Xavier Iglesias ◽  
Thorsten Schuller ◽  
Uwe Hoffmann ◽  
Ferran A. Rodríguez
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Repeated Measures ◽  
Peak Oxygen Uptake ◽  
Coefficient Of Determination ◽  
Strongly Correlated ◽  
Elite Swimmers ◽  
Modelling Procedure ◽  
Accurate Procedure ◽  
Post Hoc

To assess the validity of postexercise measurements in estimating peak oxygen uptake (V̇O2peak) in swimming, we compared oxygen uptake (V̇O2) measurements during supramaximal exercise with various commonly adopted methods, including a recently developed heart rate — V̇O2 modelling procedure. Thirty-one elite swimmers performed a 200-m maximal swim where V̇O2 was measured breath-by-breath using a portable gas analyzer connected to a respiratory snorkel, 1 min before, during, and 3 min postexercise. V̇O2peak(-20–0) was the average of the last 20 s of effort. The following postexercise measures were compared: (i) first 20-s average (V̇O2peak(0–20)); (ii) linear backward extrapolation (BE) of the first 20 s (BE(20)), 30 s, and 3 × 20-, 4 × 20-, and 3 or 4 × 20-s averages; (iii) semilogarithmic BE at 20 s (LOG(20)) and at the other same time intervals as in linear BE; and (iv) predicted V̇O2peak using mathematical modelling (pV̇O2(0–20)]. Repeated-measures ANOVA and post-hoc Bonferroni tests compared V̇O2peak (criterion) and each estimated value. Pearson’s coefficient of determination (r2) was used to assess correlation. Exercise V̇O2peak(-20–0) (mean ± SD 3531 ± 738 mL·min−1) was not different (p > 0.30) from pV̇O2(0–20) (3571 ± 735 mL·min−1), BE(20) (3617 ± 708 mL·min−1), or LOG(20) (3627 ± 746 mL·min−1). pV̇O2(0–20) was very strongly correlated with exercise V̇O2peak (r2 = 0.962; p < 0.001), and showed a low standard error of the estimate (146 mL·min−1, 4.1%) and the lowest mean difference (40 mL·min−1; 1.1%). We confirm that the new modelling procedure based on postexercise V̇O2 and heart rate measurements is a valid and accurate procedure for estimating V̇O2peak in swimmers and avoids the estimation bias produced by other methods.

scholarly journals Are Heart Rate and Rating of Perceived Exertion Effective to Control Indoor Cycling Intensity?

2020 ◽  
Vol 17 (13) ◽  
pp. 4824
Author(s):  
Rui Canário-Lemos ◽  
José Vilaça-Alves ◽  
Tiago Moreira ◽  
Rafael Peixoto ◽  
Nuno Garrido ◽  
...  
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Body Mass ◽  
Exercise Intensity ◽  
Perceived Exertion ◽  
Rating Of Perceived Exertion ◽  
Strong Correlations ◽  
Special Instrumentation ◽  
The Way

Indoor cycling’s popularity is related to the combination of music and exercise leading to higher levels of exercise intensity. It was our objective to determine the efficacy of heart rate and rating of perceived exertion in controlling the intensity of indoor cycling classes and to quantify their association with oxygen uptake. Twelve experienced males performed three indoor cycling sessions of 45 min that differed in the way the intensity was controlled: (i) oxygen uptake; (ii) heart rate; and (iii) rating of perceived exertion using the OMNI-Cycling. The oxygen uptake levels were significantly higher (p = 0.007; μp2 = 0.254) in oxygen uptake than heart rate sessions. Oxygen uptake related to body mass was significantly higher (p < 0.005) in the oxygen uptake sessions compared with other sessions. Strong correlations were observed between oxygen uptake mean in the oxygen uptake and rating of perceived exertion sessions (r =0.986, p < 0.0001) and between oxygen uptake mean in the oxygen uptake and heart rate sessions (r = 0.977, p < 0.0001). Both heart rate and rating of perceived exertion are effective in controlling the intensity of indoor cycling classes in experienced subjects. However, the use of rating of perceived exertion is easier to use and does not require special instrumentation.

Gas Exchange Anaerobic Threshold: Implications for Exercise Prescription in Children

1992 ◽  
Vol 4 (4) ◽  
pp. 360-366 ◽  
Author(s):  
Timothy R. McConnell ◽  
Jean H. Haas ◽  
Nancy C. Conlin
Keyword(s):  
Heart Rate ◽  
Gas Exchange ◽  
Oxygen Uptake ◽  
Anaerobic Threshold ◽  
Exercise Intensity ◽  
Exercise Prescription ◽  
Maximal Heart Rate ◽  
Heart Rate Reserve ◽  
Current Population

Thirty-eight children (mean age 12.2 ±3.6 yrs) were tested to (a) compare the training heart rate (HR) and oxygen uptake (V̇O2) computed from commonly used exercise prescription methods to the heart rate (HRAT) and V̇O2 (ATge) at the gas exchange anaerobic threshold, (b) compute the range of relative HRs and V̇O2s (% HRmax and % V̇O2max, respectively) at which the ATge occurred, and (c) discuss the implications for prescribing exercise intensity. The ATge occurred at a V̇O2 of 20.9 ml · kg−1 · min−1 and an HR of 129 beats·min−1. The training HR and V̇O2 computed using 70 and 85% HRmax, 70% of the maximal heart rate reserve (HRR), and 57 and 78% V·O2max, were significantly different (p<.05) from their corresponding ATge values. To compute training % HRmax, % V̇O2max, and % HRR values that would not significantly differ from the ATge, then 68% HRmax, 48% V̇O2max, and 41% HRR would need to be used for the current population.

scholarly journals Differences in Mechanical Midsole Characteristics of Running Shoes Do Not Influence Physiological Variables in Aerobic and Anaerobic Running

2019 ◽  
Vol 69 (1) ◽  
pp. 29-38
Author(s):  
Christian Mitschke ◽  
Katrin Karger ◽  
Thomas L. Milani
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Energy Loss ◽  
Ventilatory Threshold ◽  
Test Procedure ◽  
Physiological Variables ◽  
Wide Range ◽  
Running Shoes ◽  
The Individual ◽  
Aerobic And Anaerobic

Abstract The purpose of this study was to determine the influence of footwear stiffness and energy loss on oxygen uptake and heart rate in athletes running under aerobic and anaerobic conditions. Four footwear conditions with identical outsoles, insoles, upper materials, but different mechanical properties regarding polyurethane midsole materials were investigated. Respective midsole material characteristics were selected to represent a wide range of running shoes. The test procedure for eighteen well‐trained male runners was divided into three treadmill testing sessions: an incremental ramp protocol to estimate the individual ventilatory threshold (day 1), a test with 6‐minute stages in each shoe at 70% (aerobic, day 2) and 102% (anaerobic, day 3) of the participant’s ventilatory threshold. For oxygen uptake and the heart rate, no significant differences between footwear conditions were found for either running condition. Furthermore, no significant relationships between physiological variables and mechanical midsole characteristics were found. The wide range of significant stiffness differences in the rearfoot (52.7 N/mm) and forefoot areas (50.7 N/mm), as well as significant differences of the shoe midsole material energy loss in the rearfoot (18.8%) and forefoot areas (10.7%) were too low to influence physiological variables significantly when running below and slightly above the ventilatory threshold. It seems that shoe mass and shoe comfort can influence physiological variables more than the mechanical midsole characteristics of stiffness and energy loss. These results may have practical implications for shoe manufacturers, coaches, and athletes, alike.

scholarly journals Game on: a cycling exergame can elicit moderate-to-vigorous intensity. A pilot study

2020 ◽  
Vol 6 (1) ◽  
pp. e000744 ◽  
Author(s):  
Jonathan Berg ◽  
Trine Moholdt
Keyword(s):  
Heart Rate ◽  
Pilot Study ◽  
Oxygen Uptake ◽  
Aerobic Exercise ◽  
Aerobic Fitness ◽  
Exercise Intensity ◽  
Preliminary Data ◽  
Peak Oxygen Uptake ◽  
Strong Positive Correlation ◽  
Vigorous Intensity

ObjectivesThe aims of this pilot study were to investigate oxygen uptake (V̇O2) while playing a cycling exergame to assess exercise intensity to determine its potential as a feasible exercise alternative to improve aerobic fitness, and to assess the validity of using heart rate (HR) to estimate V̇O2 in exergaming.MethodsFive males (age: 32±8; peak oxygen uptake (V̇O2peak): 47.9±7.8 mL·kg−1·min−1) and five females (age: 27±3; V̇O2peak: 33.9±4.6 mL·kg−1·min−1) played the cycling exergame ‘Pedal Tanks’ for 45 min, with measurements of HR and V̇O2.ResultsAverage and peak V̇O2 during exergaming were 61.7±10.1% and 78.3±11.7% of V̇O2peak, respectively, whereas average and peak HR were 80.0±9.4% and 91.5%±6.7% of HRpeak. There was a strong positive correlation between V̇O2 and HR for all participants (p<0.05) although estimated V̇O2 from HR was 9% higher than that measured during exergaming.ConclusionOur preliminary data suggest that the cycling exergame we investigated can elicit moderate-to-vigorous intensities and may therefore be a viable alternative to conventional aerobic exercise. The exercise intensity during exergaming was overestimated when using HR alone.

scholarly journals Special Needs to Prescribe Exercise Intensity for Scientific Studies

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Peter Hofmann ◽  
Gerhard Tschakert
Keyword(s):  
Heart Rate ◽  
Exercise Training ◽  
Exercise Intensity ◽  
Performance Curve ◽  
Rate Performance ◽  
Response Relationship ◽  
Dose Response Relationship ◽  
Acute Responses ◽  
Wide Range ◽  
And Training

There is clear evidence regarding the health benefits of physical activity. These benefits follow a dose-response relationship with a particular respect to exercise intensity. Guidelines for exercise testing and prescription have been established to provide optimal standards for exercise training. A wide range of intensities is used to prescribe exercise, but this approach is limited. Usually percentages of maximal oxygen uptake (VO2) or heart rate (HR) are applied to set exercise training intensity but this approach yields substantially variable metabolic and cardiocirculatory responses. Heterogeneous acute responses and training effects are explained by the nonuniform heart rate performance curve during incremental exercise which significantly alters the calculations of %HRmaxand %HRR target HR data. Similar limitations hold true for using %VO2maxand %VO2R. The solution of these shortcomings is to strictly apply objective submaximal markers such as thresholds or turn points and to tailor exercise training within defined regions.

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