THE RELATIONSHIP BETWEEN HEART RATE AND OXYGEN UPTAKE DURING DEEP WATER AND TREADMILL RUNNING.

This study was performed to investigate the relationship between heart rate (HR) as a percentage of peak HR and oxygen uptake (V̇O2) as a percentage of peak V̇O2 in older adults while performing deep water running (DWR). Twenty-three (14 male and 9 female) apparently healthy older adults, age 50 to 70 years, volunteered. Deep water running to V̇O2peak was performed in 3-min stages at leg speeds controlled by a metronome beginning at 60 strides per minute and increasing 12 strides per minute each additional stage. Oxygen uptake and HR were continuously monitored by open-circuit spirometry and radiotelemetry, respectively. Simple linear regression analysis was used to establish the relationship between the physiological variables. The relationship between %V̇O2peak and %HRpeak was statistically significant, with the male (%V̇O2peak = 1.5301 [%HRpeak] − 54.4932 [r = .96, SEE = 6.0%]) and female (%V̇O2peak = 1.5904 [%HRpeak] - 62.3935 [r = .91, SEE = 6.9%]) regression equations being significantly different (p < .05). The regression equations of older adults and those for college-aged males (%VO2peak = 1.4634 [%HRpeak] − 49.619) and females (%V̇O2peak = 1.6649 [%HRpeak] − 67.862) were not significantly different.

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Older Women’s Cardiovascular Responses to Deep-Water Running

Journal of Aging and Physical Activity ◽

10.1123/japa.14.1.29 ◽

2006 ◽

Vol 14 (1) ◽

pp. 29-40 ◽

Cited By ~ 17

Author(s):

Gi Broman ◽

Miguel Quintana ◽

Margareta Engardt ◽

Lennart Gullstrand ◽

Eva Jansson ◽

...

Keyword(s):

Heart Rate ◽

Oxygen Uptake ◽

Deep Water ◽

Exercise Test ◽

Perceived Exertion ◽

Maximal Exercise ◽

Elderly Women ◽

Treadmill Running ◽

Maximal Exercise Test ◽

Deep Water Running

The aim of the study was to examine submaximal and maximal physiological responses and perceived exertion during deep-water running with a vest compared with the responses during treadmill running in healthy elderly women. Eleven healthy women 70 ± 2 years old participated. On two different occasions they performed a graded maximal exercise test on a treadmill on land and a graded maximal exercise test in water wearing a vest. At maximal work the oxygen uptake was 29% lower (p < .05), the heart rate was 8% lower (p < .05), and the ventilation was 16% lower (p < .05) during deep-water running than during treadmill running. During submaximal absolute work the heart rate was higher during deep-water running than during treadmill running for the elderly women. The participants had lower maximal oxygen uptake, heart rate, ventilation, respiratory-exchange ratio, and rate of perceived exertion during maximal deep-water running with a vest than during maximal treadmill running. These responses were, however, higher during submaximal deep-water running than during treadmill running.

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Maximal Oxygen Uptake and Daily Physical Activity in 7- to 12-Year-Old Boys

Pediatric Exercise Science ◽

10.1123/pes.5.4.357 ◽

1993 ◽

Vol 5 (4) ◽

pp. 357-366 ◽

Cited By ~ 5

Author(s):

Hazzaa M. Al-Hazzaa ◽

Mohammed A. Sulaiman

Keyword(s):

Physical Activity ◽

Heart Rate ◽

Oxygen Uptake ◽

Maximal Oxygen Uptake ◽

Open Circuit ◽

Daily Physical Activity ◽

Activity Level ◽

Activity Levels ◽

School Time ◽

The Relationship

The present study examined the relationship between maximal oxygen uptake (V̇O2max) and daily physical activity in a group of 7- to 12-year-old boys. V̇O2max was assessed through the incremental treadmill test using an open circuit system. Physical activity level was obtained from heart rate telemetry outside of school time for 8 hrs during weekdays and during 40 min of physical education classes. The findings indicated that the absolute value of V̇O2max increased with age, while relative to body weight it remained almost the same across age, with a mean of 48.4 ml · kg−1 · min−1. Moreover, heart rate telemetry showed that the boys spent a limited amount of time on activities that raise the heart rate to a level above 160 bpm (an average of 1.9%). In addition, V̇O2max was found to be significantly related to the percentage of time spent at activity levels at or above a heart rate of 140 bpm, but not with activity levels at or above a heart rate of 160 bpm.

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Verification phase as a useful tool in the determination of the maximal oxygen uptake of distance runners

Applied Physiology Nutrition and Metabolism ◽

10.1139/h06-023 ◽

2006 ◽

Vol 31 (5) ◽

pp. 541-548 ◽

Cited By ~ 53

Author(s):

Adrian W. Midgley ◽

Lars R. McNaughton ◽

Sean Carroll

Keyword(s):

Heart Rate ◽

Oxygen Uptake ◽

Maximal Oxygen Uptake ◽

Peak Oxygen Uptake ◽

Treadmill Running ◽

Distance Runners ◽

Peak Heart Rate ◽

Incremental Test ◽

Volitional Exhaustion

This study investigated the utility of a verification phase for increasing confidence that a “true” maximal oxygen uptake had been elicited in 16 male distance runners (mean age (±SD), 38.7 (± 7.5 y)) during an incremental treadmill running test continued to volitional exhaustion. After the incremental test subjects performed a 10 min recovery walk and a verification phase performed to volitional exhaustion at a running speed 0.5 km·h–1 higher than that attained during the last completed stage of the incremental phase. Verification criteria were a verification phase peak oxygen uptake ≤ 2% higher than the incremental phase value and peak heart rate values within 2 beats·min–1 of each other. Of the 32 tests, 26 satisfied the oxygen uptake verification criterion and 23 satisfied the heart rate verification criterion. Peak heart rate was lower (p = 0.001) during the verification phase than during the incremental phase, suggesting that the verification protocol was inadequate in eliciting maximal values in some runners. This was further supported by the fact that 7 tests exhibited peak oxygen uptake values over 100 mL·min–1 (≥ 3%) lower than the peak values attained in the incremental phase. Further research is required to improve the verification procedure before its utility can be confirmed.

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Effect of exercise conditioning on coronary resistance

Journal of Applied Physiology ◽

10.1152/jappl.1982.53.3.631 ◽

1982 ◽

Vol 53 (3) ◽

pp. 631-636 ◽

Cited By ~ 17

Author(s):

I. Y. Liang ◽

H. L. Stone

Keyword(s):

Heart Rate ◽

Aortic Pressure ◽

Treadmill Running ◽

Atrial Pacing ◽

Adrenergic Blockade ◽

Coronary Resistance ◽

Implanted Electrodes ◽

Daily Exercise ◽

Before And After ◽

The Relationship

Diastolic coronary resistance (DCR) was determined in seven conscious dogs in the untrained state and after 4–5 wk of daily exercise conditioning (partial training). The conditioning regime consisted of treadmill running 5 days/wk. The dogs were instrumented to measure aortic pressure and left circumflex coronary flow during atrial pacing with implanted electrodes. Heart rate was varied from the resting value to 240 beats/min before and after adrenergic blockade with propranolol (beta B, 1 mg/kg) or phentolamine (alpha B, 1 mg/kg); myocardial oxygen consumption (MVO2) was measured in three dogs under the same condition in both the untrained (UT) and partially trained (PT) condition. DCR decreased with increasing heart rate [from 4.75 +/- 0.56 (SE) to 2.48 +/- 0.22 Torr . ml-1 . min at 240 beats/min]; alpha B reduced DCR, whereas beta B increased DCR. In the PT condition, DCR decreased to 4.02 +/- 0.40 Torr . ml-1 . min at rest and was decreased to 1.82 +/- 0.16 Torr . ml-1 . min at 240 beats/min (P less than 0.05 compared with UT). alpha-Adrenergic and beta-adrenergic blockade in the PT condition resulted in parallel reduction in DCR compared with the UT condition. MVO2 was unaffected by either PT or adrenergic blockade but increased as heart rate increased with atrial pacing. These data suggest a change in caliber of the coronary resistance vessel because of the parallel shift in the relationship between DCR and heart rate.

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

Applied Physiology Nutrition and Metabolism ◽

10.1139/h11-100 ◽

2011 ◽

Vol 36 (6) ◽

pp. 839-847 ◽

Cited By ~ 8

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.

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