scholarly journals Validity of Prediction Equations of Maximal Heart Rate in Physically Active Female Adolescents and the Role of Maturation

Medicina ◽  
2019 ◽  
Vol 55 (11) ◽  
pp. 735
Author(s):  
Papadopoulou ◽  
Papadopoulou ◽  
Alipasali ◽  
Hatzimanouil ◽  
Rosemann ◽  
...  
Keyword(s):  
Heart Rate ◽  
Assessment Method ◽  
Female Adolescents ◽  
Maximal Heart Rate ◽  
Prediction Equations ◽  
Physically Active ◽  
Main Effect ◽  
Testing Tool ◽  
Shuttle Run

Background and objectives: Maximal heart rate (HRmax) is an important training and testing tool, especially in the context of evaluating intensity in exercise prescription; however, few studies have examined the validity of prediction equations of HRmax in physically active female adolescents and the role of maturation level. Therefore, the aim of the present study was to examine the differences between measured and predicted HRmax in a sample of physically active female adolescents. Materials and Methods: Seventy-one selected volleyball players (age 13.3 ± 0.7 years, body mass 62.0 ± 7.2 kg, height 1.72 ± 0.06 m) performed a 20 m shuttle run endurance test, and the actual HRmax was compared with Tanaka HRmax (‘208 − 0.7 × age’) and Fox HRmax (‘220 − age’). Results: A large main effect of assessment method on HRmax was found (p < 0.001, η2 = 0.486) with Fox overestimating actual HRmax by 6.8 bpm (95% confidence intervals, CI; 4.2, 9.3) and Tanaka underestimating actual HRmax by −2.6 bpm (95% CI; −5.1, −0.1). The more matured participants had similar actual HRmax (mean difference −2.4 bpm; 95% CI; −6.5, 1.7; p = 0.242, d = −0.28), difference Fox − actual HRmax (1.5 bpm; 95% CI; −2.6, 5.6, p = 0.466, d = 0.17), and difference Tanaka − actual HRmax (1.7 bpm; 95% CI; −2.4, 5.8; p = 0.414, d = 0.19) to the less matured participants. Conclusions: These findings suggest that age-based prediction equations of HRmax developed in adult populations should be applied with caution in physically active female adolescents, and Tanaka should be preferred instead of the Fox equation.

Greater rate of decline in maximal aerobic capacity with age in physically active vs. sedentary healthy women

1997 ◽  
Vol 83 (6) ◽  
pp. 1947-1953 ◽  
Author(s):  
Hirofumi Tanaka ◽  
Christopher A. Desouza ◽  
Pamela P. Jones ◽  
Edith T. Stevenson ◽  
Kevin P. Davy ◽  
...  
Keyword(s):  
Heart Rate ◽  
Aerobic Capacity ◽  
Relative Rate ◽  
Maximal Heart Rate ◽  
Absolute Rate ◽  
Maximal Aerobic Capacity ◽  
Physically Active ◽  
Healthy Women ◽  
The Absolute ◽  
Rate Of Decline

Tanaka, Hirofumi, Christopher A. DeSouza, Pamela P. Jones, Edith T. Stevenson, Kevin P. Davy, and Douglas R. Seals. Greater rate of decline in maximal aerobic capacity with age in physically active vs. sedentary healthy women. J. Appl. Physiol. 83(6): 1947–1953, 1997.—Using a meta-analytic approach, we recently reported that the rate of decline in maximal oxygen uptake (V˙o 2 max) with age in healthy women is greatest in the most physically active and smallest in the least active when expressed in milliliters per kilogram per minute per decade. We tested this hypothesis prospectively under well-controlled laboratory conditions by studying 156 healthy, nonobese women (age 20–75 yr): 84 endurance-trained runners (ET) and 72 sedentary subjects (S). ET were matched across the age range for age-adjusted 10-km running performance. Body mass was positively related with age in S but not in ET. Fat-free mass was not different with age in ET or S. Maximal respiratory exchange ratio and rating of perceived exertion were similar across age in ET and S, suggesting equivalent voluntary maximal efforts. There was a significant but modest decline in running mileage, frequency, and speed with advancing age in ET.V˙o 2 max(ml ⋅ kg−1 ⋅ min−1) was inversely related to age ( P < 0.001) in ET ( r = −0.82) and S ( r = −0.71) and was higher at any age in ET. Consistent with our meta-analysic findings, the absolute rate of decline inV˙o 2 max was greater in ET (−5.7 ml ⋅ kg−1 ⋅ min−1 ⋅ decade−1) compared with S (−3.2 ml ⋅ kg−1 ⋅ min−1 ⋅ decade−1; P < 0.01), but the relative (%) rate of decline was similar (−9.7 vs −9.1%/decade; not significant). The greater absolute rate of decline inV˙o 2 max in ET compared with S was not associated with a greater rate of decline in maximal heart rate (−5.6 vs. −6.2 beats ⋅ min−1 ⋅ decade−1), nor was it related to training factors. The present cross-sectional findings provide additional evidence that the absolute, but not the relative, rate of decline in maximal aerobic capacity with age may be greater in highly physically active women compared with their sedentary healthy peers. This difference does not appear to be related to age-associated changes in maximal heart rate, body composition, or training factors.

Predicting Maximal Lactate Steady State from Carminatti’s Shuttle Run Test in Soccer Players

2020 ◽  
Author(s):  
Lorival José Carminatti ◽  
Bruna Nunes Batista ◽  
Juliano Fernandes da Silva ◽  
Artur Ferreira Tramontin ◽  
Vitor Pereira Costa ◽  
...  
Keyword(s):  
Heart Rate ◽  
Steady State ◽  
Soccer Players ◽  
Maximal Heart Rate ◽  
Maximal Lactate Steady State ◽  
Incremental Test ◽  
Run Test ◽  
Peak Speed ◽  
Linear Regressions ◽  
Shuttle Run

AbstractThe objective of the present study was to determine the validity of Carminatti’s shuttle run incremental test–T-Car derived parameters in estimating the maximal lactate steady state determined in shuttle run format. Eighteen soccer players performed a T-Car test, and several trials to determine the maximal lactate steady state. From T-Car were derived the heart rate deflection point, peak speed, maximal heart rate and parameters resulting from percentage of peak measures. The validity was accessed by Bland-Altman plots, linear regressions, and two one-sided tests of equivalence analysis. The results showed the speed at 80.4% of T-Car peak speed, the heart rate deflection point and the 91.4% of maximal heart rate were equivalent to maximal lactate steady state (Mean difference; ±90% compatibility interval; −0.8; ±1.5%, −0.4; ±1.1%, and 0.0; ±2.7%, respectively). Additionally, peak speed during the T-Car test was a stronger predictor of maximal lactate steady state (MLSS [km/h]=2.57+0.65 × sPeak; r=0.82 [90% CI; 0.62–0.92], standard error of the estimate=3.6%; 90% CI ×/÷1.4). Therefore, soccer players can use the T-Car derived parameters as a noninvasive and practical alternative to estimate the specific maximal lactate steady state for soccer.

Evaluation of Maximal Heart Rate Prediction Equations for Women During Breast Cancer Treatment: A Measurement Focused Study

2013 ◽  
Vol 31 (2) ◽  
pp. 11-16 ◽  
Author(s):  
Jacqueline S. Drouin ◽  
Lisa Birkmeier ◽  
Kristy Jones ◽  
Shanna Miller ◽  
Ronald Gellish ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Heart Rate ◽  
Cancer Treatment ◽  
Breast Cancer Treatment ◽  
Maximal Heart Rate ◽  
Prediction Equations ◽  
Rate Prediction

Role of Maximal Heart Rate and Arterial O2 Saturation on the Decrement of V·O2max in Moderate Acute Hypoxia in Trained and Untrained Men

2007 ◽  
Vol 28 (3) ◽  
pp. 186-192 ◽  
Author(s):  
P. Mollard ◽  
X. Woorons ◽  
M. Letournel ◽  
J. Cornolo ◽  
C. Lamberto ◽  
...  
Keyword(s):  
Heart Rate ◽  
Acute Hypoxia ◽  
Maximal Heart Rate ◽  
Arterial O2 Saturation

Effects of β-Blockers on Maximal Heart Rate Prediction Equations in a Cardiac Population

2018 ◽  
Vol 38 (2) ◽  
pp. 111-117
Author(s):  
Elizabeth Godlasky ◽  
Trisha Hoffman ◽  
Sonya Weber-Peters ◽  
Richard Bradford ◽  
Nathan Miller ◽  
...  
Keyword(s):  
Heart Rate ◽  
Maximal Heart Rate ◽  
Prediction Equations ◽  
Rate Prediction ◽  
Β Blockers

scholarly journals Influence of the Duration of a Treadmill Walking Bout on Heart Rate Variability at Rest in Physically Active Women

2010 ◽  
Vol 7 (1) ◽  
pp. 95-101 ◽  
Author(s):  
David V.B. James ◽  
Linda J. Reynolds ◽  
Sara Maldonado-Martin
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Low Frequency ◽  
Moderate Intensity ◽  
Physically Active ◽  
Subtle Effect ◽  
Main Effect ◽  
Activity Bout ◽  
H 51 ◽  
Post Hoc

Background:Heart rate variability (HRV) has been promoted as a noninvasive method of evaluating autonomic influence on cardiac rhythm. Although female subjects predominate in the walking studies, no study to date has examined the influence of the duration of a moderate intensity walking physical activity bout on HRV in this population.Methods:Twelve healthy physically active middle-aged women undertook 2 conditions; 20min (W20) and 60min (W60) bouts of walking on a treadmill. Resting HRV measures were obtained before (−1 h), and 1 h and 24 h after the walking bouts.Results:Mean NN interval (ie, normal-to-normal intervals between adjacent QRS complexes) was significantly lower (P = .017) at +1 h in W60 (832, 686−979ms) compared with W20 (889, 732−1046ms). A borderline main effect for time was observed for both the SDNN intervals in W60 (P = .056), and for low frequency (LFabs) power in W60 (P = .047), with post hoc tests revealing a significant increase between −1 h (51, 33−69 ms and 847, 461−1556 ms2) and +1 h (65, 34−97ms and 1316, 569−3042 ms2) for SDNN and LFabs power, respectively, but no increase at +24h compared with −1 h.Conclusions:It appears that a walking bout of 60 min duration does alter cardiac autonomic influence in healthy active women, and this alteration is not evident after 20 min of walking. Given the rather subtle effect, further studies with larger sample sizes are required to explore the nature of the changes in cardiac autonomic influence following a prolonged bout of walking.

The Effects of a Caffeine Placebo and Experimenter Expectation on Blood Pressure, Heart Rate, Well-Being, and Cognitive Performance

2001 ◽  
Vol 6 (1) ◽  
pp. 15-25 ◽  
Author(s):  
Harald Walach ◽  
Stefan Schmidt ◽  
Yvonne-Michelle Bihr ◽  
Susanne Wiesch
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Cognitive Task ◽  
Well Being ◽  
Control Group ◽  
Double Blind ◽  
Main Effect ◽  
The Difference ◽  
Being There ◽  
To Receive

We studied the effect of experimenter expectations and different instructions in a balanced placebo design. 157 subjects were randomized into a 2 × 4 factorial design. Two experimenters were led to expect placebos either to produce physiological effects or not (pro- vs. antiplacebo). All subjects except a control group received a caffeine placebo. They were either made to expect coffee, no coffee, or were in a double-blind condition. Dependent measures were blood pressure, heart rate, well-being, and a cognitive task. There was one main effect on the instruction factor (p = 0.03) with the group “told no caffeine” reporting significantly better well-being. There was one main effect on the experimenter factor with subjects instructed by experimenter “proplacebo” having higher systolic blood pressure (p = 0.008). There was one interaction with subjects instructed by experimenter “proplacebo” to receive coffee doing worse in the cognitive task than the rest. Subjects instructed by experimenter “antiplacebo” were significantly less likely to believe the experimental instruction, and that mostly if they had been instructed to receive coffee. Contrary to the literature we could not show an effect of instruction, but there was an effect of experimenters. It is likely, however, that these experimenter effects were not due to experimental manipulations, but to the difference in personalities.

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