scholarly journals Parathormone and Serum Calcium Response to Moderate Intensity Treadmill Exercise in Elderly

2021 ◽  
Vol 8 (1) ◽  
pp. 8-14
Author(s):  
Mariam Mohamed ◽  
Walaa Keshak ◽  
Amina Hosny ◽  
Hany Elsisi
Keyword(s):  
Serum Calcium ◽  
Treadmill Exercise ◽  
Moderate Intensity ◽  
Calcium Response

scholarly journals THE SERUM CALCIUM RESPONSE TO INGESTED CALCIUM

1935 ◽  
Vol 112 (1) ◽  
pp. 1-7
Author(s):  
S. Freeman ◽  
E.R. Kant ◽  
A.C. Ivy
Keyword(s):  
Serum Calcium ◽  
Calcium Response

Epinephrine inhibits exogenous glucose utilization in exercising horses

2000 ◽  
Vol 88 (5) ◽  
pp. 1777-1790 ◽  
Author(s):  
Raymond J. Geor ◽  
Kenneth W. Hinchcliff ◽  
Laura Jill McCutcheon ◽  
Richard A. Sams
Keyword(s):  
Muscle Glycogen ◽  
Glucose Utilization ◽  
Treadmill Exercise ◽  
Moderate Intensity ◽  
Oral Glucose ◽  
Moderate Intensity Exercise ◽  
Epinephrine Infusion ◽  
Glucose Administration ◽  
Exogenous Glucose ◽  
Glycogen Utilization

This study examined the effects of preexercise glucose administration, with and without epinephrine infusion, on carbohydrate metabolism in horses during exercise. Six horses completed 60 min of treadmill exercise at 55 ± 1% maximum O2 uptake 1) 1 h after oral administration of glucose (2 g/kg; G trial); 2) 1 h after oral glucose and with an intravenous infusion of epinephrine (0.2 μmol ⋅ kg− 1 ⋅ min− 1; GE trial) during exercise, and 3) 1 h after water only (F trial). Glucose administration (G and GE) caused hyperinsulinemia and hyperglycemia (∼8 mM). In GE, plasma epinephrine concentrations were three- to fourfold higher than in the other trials. Compared with F, the glucose rate of appearance was ∼50% and ∼33% higher in G and GE, respectively, during exercise. The glucose rate of disappearance was ∼100% higher in G than in F, but epinephrine infusion completely inhibited the increase in glucose uptake associated with glucose administration. Muscle glycogen utilization was higher in GE [349 ± 44 mmol/kg dry muscle (dm)] than in F (218 ± 28 mmol/kg dm) and G (201 ± 35 mmol/kg dm). We conclude that 1) preexercise glucose augments utilization of plasma glucose in horses during moderate-intensity exercise but does not alter muscle glycogen usage and 2) increased circulating epinephrine inhibits the increase in glucose rate of disappearance associated with preexercise glucose administration and increases reliance on muscle glycogen for energy transduction.

Perceived Exertion of Physical Activity During Pregnancy

2015 ◽  
Vol 12 (7) ◽  
pp. 1039-1043 ◽  
Author(s):  
Mallory R. Marshall ◽  
James M. Pivarnik
Keyword(s):  
Physical Activity ◽  
Perceived Exertion ◽  
Treadmill Exercise ◽  
Physical Activity Behavior ◽  
Rating Of Perceived Exertion ◽  
Moderate Intensity ◽  
Physical Activity Intensity ◽  
Time Points ◽  
Activity Intensity ◽  
Vigorous Intensity

Background:Maternal physical activity declines across gestation, possibly due to changing perception of physical activity intensity. Our purpose was to a) determine whether rating of perceived exertion (RPE) during a treadmill exercise changes at a given energy expenditure, and b) identify the influence of prepregnancy physical activity behavior on this relationship.Methods:Fifty-one subjects were classified as either exercisers (N = 26) or sedentary (N = 25). Participants visited our laboratory at 20 and 32 weeks gestation and at 12 weeks postpartum. At each visit, women performed 5 minutes of moderate and vigorous treadmill exercise; speed was self-selected. Heart rate (HR), oxygen consumption (VO2), and RPE were measured during the last minute at each treadmill intensity.Results:At moderate intensity, postpartum VO2 was higher compared with 20- or 32-week VO2, but there was no difference for HR or RPE. For vigorous intensity, postpartum HR and VO2 were higher than at 32 weeks, but RPE was not different at any time points.Conclusions:RPE does not differ by pregnancy time point at either moderate or vigorous intensity. However, relative to energy cost, physical activity was perceived to be more difficult at 32 weeks compared with other time points. Pregnant women, then, may compensate for physiological changes during gestation by decreasing walking/running speeds.

scholarly journals Treadmill Exercise Training Ameliorates Functional and Structural Age-Associated Kidney Changes in Male Albino Rats

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Heba R. Salem ◽  
Manar A. Faried
Keyword(s):  
Vascular Endothelial Growth Factor ◽  
Growth Factor ◽  
Exercise Training ◽  
Treadmill Exercise ◽  
Moderate Intensity ◽  
Albino Rats ◽  
Vascular Endothelial ◽  
Aquaporin 3 ◽  
Endothelial Growth Factor ◽  
Aged Kidney

Aging is a biological process that impacts multiple organs. Unfortunately, kidney aging affects the quality of life with high mortality rate. So, searching for innovative nonpharmacological modality improving age-associated kidney deterioration is important. This study aimed to throw more light on the beneficial effect of treadmill exercise on the aged kidney. Thirty male albino rats were divided into three groups: young (3-4 months old), sedentary aged (23-24 months old), and exercised aged (23-24 months old, practiced moderate-intensity treadmill exercise 5 days/week for 8 weeks). The results showed marked structural alterations in the aged kidney with concomitant impairment of kidney functions and increase in arterial blood pressure with no significant difference in kidney weight. Also, it revealed that treadmill exercise alleviated theses effects in exercised aged group with reduction of urea and cystatin C. Exercise training significantly decreased glomerulosclerosis index, tubular injury score, and % area of collagen deposition. Treadmill exercise exerted its beneficial role via a significant reduction of C-reactive protein and malondialdehyde and increase in total antioxidant capacity. In addition, exercise training significantly decreased desmin immunoreaction and increased aquaporin-3, vascular endothelial growth factor, and beclin-1 in the aged kidney. This study clarified that treadmill exercise exerted its effects via antioxidant and anti-inflammatory mechanisms, podocyte protection, improving aquaporin-3 and vascular endothelial growth factor expression, and inducing autophagy in the aged kidney. This work provided a new insight into the promising role of aerobic exercise to ameliorate age-associated kidney damage.

scholarly journals VALIDATION OF SMARTPHONE FREE HEART RATE MONITORING APPLICATION DURING TREADMILL EXERCISE

2019 ◽  
Vol 25 (2) ◽  
pp. 112-115
Author(s):  
Zulkarnain Jaafar ◽  
Aravind Kumar Murugan
Keyword(s):  
Heart Rate ◽  
Standard Error ◽  
Treadmill Exercise ◽  
Recovery Period ◽  
Moderate Intensity ◽  
Smartphone App ◽  
Intensity Level ◽  
Heart Rate Monitoring ◽  
Heart Rates ◽  
Monitoring Application

ABSTRACT Objective: The number of people participating in leisure sports activities and amateur competitions has been rising sharply. Free smartphone heart rate monitoring applications are readily available for use; however, information on their accuracy during exercise is still limited. Therefore, the purpose of our study was to validate a smartphone free heart rate monitoring application during treadmill exercise in healthy individuals. Methods: This was a prospective experimental study testing the free heart rate app 'INSTANT HEART RATE: AZUMIO.' Twenty-seven healthy participants were requested to perform the treadmill task with four different workloads: walking at 2.0 mph, walking at 3.5 mph, jogging at 4.5 mph and running at 6.0 mph. Participants had to perform the exercises for 3 minutes for each workload, and heart rates were recorded using the smartphone app and ECG at rest, during the exercise and recovery periods at each 60-second interval. Results: Heart rates measured using the free smartphone app at rest, walking at 2.0 mph, brisk walking at 3.5 mph, slow jogging at 4.5 mph and recovery stage were accurate with correlation coefficient value ≥0.95 and standard error of estimate <1 bpm. However, the correlation values during running at 6 mph were inconsistent with a standard error of estimate >5 bpm. Conclusion: The free smartphone app that we tested accurately estimates heart rate at rest, during low to moderate intensity exercise and the recovery period, but becomes less consistent during high-intensity exercise, making this app suitable for use during indoor activities of low to moderate intensity. Level of evidence II; Diagnostic Studies - Investigating a diagnostic test.

Pulmonary V̇o2 dynamics during treadmill and arm exercise in peripheral arterial disease

2004 ◽  
Vol 97 (2) ◽  
pp. 627-634 ◽  
Author(s):  
Timothy A. Bauer ◽  
Eric P. Brass ◽  
Mark Nehler ◽  
Thomas J. Barstow ◽  
William R. Hiatt
Keyword(s):  
Blood Flow ◽  
Peripheral Arterial Disease ◽  
Treadmill Exercise ◽  
Arterial Disease ◽  
Occlusive Disease ◽  
Lower Limbs ◽  
Whole Body ◽  
Moderate Intensity ◽  
Arm Exercise ◽  
Peripheral Arterial

Slowed pulmonary O2 uptake (V̇o2) kinetics in peripheral arterial disease (PAD) have been attributed to impaired limb blood flow and/or peripheral muscle metabolic abnormalities. Although PAD results from atherosclerotic occlusive disease in the arteries to the lower extremities, systemic abnormalities affecting whole body O2 delivery or vascular function in PAD could also partially explain the exercise impairment. To date, the effects of these systemic abnormalities have not been evaluated. To test the hypothesis that the slowed pulmonary V̇o2 kinetics in PAD reflects local and not systemic abnormalities, V̇o2 kinetics were evaluated after the onset of constant-load exercise of the upper and lower limbs in PAD patients and healthy controls (Con). Ten PAD patients and 10 Con without significant cardiopulmonary dysfunction performed multiple transitions from rest to moderate-intensity arm ergometry and treadmill exercise to assess their V̇o2 kinetic responses. Reactive hyperemic (RH) blood flow was assessed in the arms and legs as a measure of endothelial function. Compared with Con, PAD V̇o2 kinetic phase 2 time constants were prolonged during treadmill exercise (PAD 34.3 ± 9.2 s vs. Con 19.6 ± 3.5 s; P < 0.01) but not arm exercise (PAD 38.5 ± 7.5 s vs. Con 32.5 ± 9.0 s; P > 0.05). RH blood flow was significantly reduced in the legs (PAD 20.7 ± 8.3 vs. Con 46.1 ± 17.1 ml·100 ml−1·min−1; P < 0.01) and arms of PAD subjects (PAD 34.0 ± 8.6 vs. Con 50.8 ± 12.2 ml·100 ml−1·min−1; P < 0.01) compared with Con, but RH limb flow was not correlated with arm or treadmill V̇o2 kinetic responses in either group. In summary, slowed pulmonary V̇o2 kinetics in PAD patients occur only with exercise of the lower limbs affected by the arterial occlusive disease process and are not slowed with exercise of the unaffected upper extremities compared with controls. Furthermore, the slowed pulmonaryV̇o2 kinetics of the lower extremity could not be explained by any abnormalities in resting cardiac or pulmonary function and were not related to the magnitude of reduction in limb vascular reactivity.

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