Polarcardiographic responses to maximal exercise in healthy young adults

Bruce, Robert A.; Detry, Jean-Marie R.; Early, Karen; Early, Ronald G.

doi:10.1016/0002-8703(72)90140-8

Cited by 25 publications

(5 citation statements)

References 4 publications

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“…Figures [3][4][5] show PCGs in typical cases. In addition to the changes in the M tracing, there was a rightward direction of early ST-vectors revealed by the a-longitude tracing approaching 180.…”

Section: Resultsmentioning

confidence: 99%

Ischemic Polarcardiographic Changes Induced By Exercise

et al. 1973

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The polarcardiographic responses to exercise in normal men, young and middle-aged, have been compared with those of men who show ischemic responses on the electrocardiogram. Changes in the ST-vectors are the most significant. These changes have been reduced to a single numerical quantity based on the spatial magnitude of the vector at the end of the QRS complex and the spatial direction of a vector occurring at a clearly specified time during the period of the ST-segment. The assets of polarcardiography are that it enables study of direction and nwgnitude of ST-vectors in a time sequence. Thus it provides information of clinical importance which cannot be obtained by either electro-or vectorcardiography.

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Section: Resultsmentioning

confidence: 99%

Ischemic Polarcardiographic Changes Induced By Exercise

et al. 1973

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“…Participants then completed the GMET using the Bruce protocol, and continued until their Borg rating of perceived exertion (RPE) was 20. The estimated VO 2max score was calculated using the following formulae: men = 14.8 − (1.379 × time) + (0.451 × time 2 ) − (0.012 × time 3 ), females = 4.38 × time − 3.9, where "time" was the total graded maximal exercise test time to completion [34]. Participants consumed their selected beverage for that testing session (either water or a CHO drink) during the first stage of the maximal exercise test.…”

Section: Methodsmentioning

confidence: 99%

An Intense Bout of Acute Aerobic Exercise, but Not a Carbohydrate Supplement, Improves Cognitive Task Performance in a Sample of Black, Indigenous, and People of Color (BIPOC) Student Athletes

Weyden

Martin

Rodriguez

et al. 2023

Sports

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Background: There are contradictory findings in the literature on whether an acute bout of aerobic exercise leads to a post-exercise improvement in cognitive function (CF). Moreover, participants used in the published literature are not representative of the racial make-up of sport or tactical populations. Methods: A randomized crossover design was incorporated, with participants randomly consuming water or a carbohydrate sports drink within the first 3 min of a graded maximal exercise test (GMET) conducted in a laboratory. Twelve self-identified African American participants, (seven males, five females, age = 21.42 ± 2.38 years, height = 174.94 ± 12.55 cm, mass = 82.45 ± 33.09 kg) completed both testing days. Participants completed the CF tests immediately pre- and post-GMET. CF was assessed with the Stroop color and word task (SCWT) and concentration task grid (CTG). Participants completed the GMET when they reported a score of 20 on the Borg ratings of perceived exertion scale. Results: Time to complete the SCWT incongruent task (p < 0.001) and CTG performance (p < 0.001) significantly improved post-GMET in both conditions. VO2max was positively correlated with pre- and post-GMET SCWT performance. Conclusions: The findings of our study suggest that an acute bout of maximal exercise significantly improves CF. Additionally, cardiorespiratory fitness is positively associated with CF in our sample of student athletes from a historically Black college and university.

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“…Throughout the test, the Fitmate Pro device from Cosmed, Italy, was used to record peak and mean data for gas exchange and heart rate. Fitmate Pro designates peak VO 2max as the highest attainable rate of oxygen consumption [42]. Valid peak VO 2max values were established when three or more of the following criteria were met:…”

Section: Bruce Protocol Treadmill Testmentioning

confidence: 99%

Effects of different rest intervals in high intensity interval training programs on VO2max, body composition, and isokinetic strength and power

2024

JOMH

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The aim of this study was to evaluate the effect of 8 weeks of short and long rest running-based high-intensity training (HIIT) on body composition, isokinetic strength, and maximal oxygen uptake (VO 2max ). Nineteen physically active men were recruited to voluntarily participate in the study. The participants were grouped using the closed-envelope randomized method as HIIT with a short rest (HIITS, n = 9; age: 19.60 ± 1.34 years) and HIIT with a long rest (HIITL, n = 10; age: 19.77 ± 0.97). Pre and post the 8-week running-based HIIT program, body mass index and body fat % were measured and all subjects performed isokinetic strength tests to determine their hamstring (H)/quadriceps (Q) peak torque ratio and the peak power and peak work for their H and Q muscles. The participants also underwent a graded exercise test to determine their VO 2max . Statistical analysis performed with One-Way Variance Analysis and Bonferroni correction post hoc tests. As a result of the study, there were no significant differences between the pre-and post-training isokinetic strength parameters for the H and Q of HIITL and HIITS at velocities of 60 and 240 • s −1 . The VO 2max did not change for HIITS training but the VO 2max increased (p < 0.05) for HIITL training. In conclusion, that HIITL and HIITS programs for 8 weeks did not change the relative and absolute strength, force production and the VO 2max , but the VO 2max increased (p < 0.05) for HIITL training.

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Polarcardiographic responses to maximal exercise in healthy young adults

Cited by 25 publications

References 4 publications

Ischemic Polarcardiographic Changes Induced By Exercise

Ischemic Polarcardiographic Changes Induced By Exercise

An Intense Bout of Acute Aerobic Exercise, but Not a Carbohydrate Supplement, Improves Cognitive Task Performance in a Sample of Black, Indigenous, and People of Color (BIPOC) Student Athletes

Effects of different rest intervals in high intensity interval training programs on VO2max, body composition, and isokinetic strength and power

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