Results 71 to 80 of about 31,531 (242)

Optimal Pacing for Running 400 m and 800 m Track Races

, 2012
Physicists seeking to understand complex biological systems often find it rewarding to create simple "toy models" that reproduce system behavior. Here a toy model is used to understand a puzzling phenomenon from the sport of track and field.
Baumann W., Gajer B., Hanon C., Hirvonen J., Hultman E., James Reardon, Matrahazi Imre, Sage A., Sahlin K., Čoh M.   +9 more
core   +1 more source

Sodium bicarbonate and high-intensity-cycling capacity: variability in responses [PDF]

, 2014
Purpose: The aim of this study was to determine whether gastrointestinal (GI) distress affects the ergogenicity of sodium bicarbonate and whether the degree of alkalaemia or other metabolic responses are different between individuals who improve exercise
Batterham AM, Carr AJ, Driller MW, Higgins MF, Hill CA, Horswill CA, Ibanez J, Katz A, Linderman J, Matson LG, McNaughton LR, McNaughton LR, Northgraves MJ, Price M, Price MJ, Reilly T, Sale C, Saunders B, Van Montfoort MCE   +18 more
core   +1 more source

The role of acid‐base balance in cerebrovascular and ventilatory responses to CO2 during 10 h normobaric hypoxia

The Journal of Physiology, EarlyView.
Abstract figure legend During 10 h exposures to normobaric hypoxia exposure there was a selective leftward shift in ventilatory response to hyperoxic hypercapnic rebreathing, but not the cerebrovascular response. The key findings are that the resetting of the central chemoreflex to lower PCO2${P_{{\mathrm{C}}{{\mathrm{O}}_2}}}$ during early hypoxic ...
Holly Barclay, Saptarshi Mukerji, Bengt Kayser, Jui‐Lin Fan   +3 more
wiley   +1 more source

Bartter syndrome with long-term follow-up: a case report

Journal of International Medical Research, 2020
Bartter syndrome is a rare inherited disease caused by CLCNKB mutation, which results in inactivation of the chloride channel Kb protein. Bartter syndrome is characterized by extreme hypokalemia, hypochloremia, metabolic alkalosis, hyperrenin-induced ...
Xueling Wu, Gang Yang, Shiyu Chen, Min Tang, Shan Jian, Fuhui Chen, Xiulin Wu   +6 more
doaj   +1 more source

Axial heterogeneity and filtered-load dependence of proximal bicarbonate reabsorption [PDF]

, 1986
A theoretical model was developed to examine the role of physical and chemical factors in the control of bicarbonate reabsorption in the renal proximal tubule. Included in the model were axial and radial variations in the concentrations of HCO3-, CO2 and
Arnqvist, H J, Bilo, H J G, Groenier, K H, Kleefstra, N, Logtenberg, S J J, van Dijk, P R   +5 more
core   +2 more sources

Ventilatory and cerebrovascular responses to exercise in lowlander children acclimatizing to high‐altitude

The Journal of Physiology, EarlyView.
Abstract figure legend To investigate age‐related differences in ventilatory and cerebrovascular responses to exercise at high‐altitude, adults (n = 10, 23–44 years) and children (n = 8, 7–14 years) completed progressive cycling exercise tests at sea‐level and following 6 days of acclimatization at 3800 m.
J. L. Koep, M. G. Rieger, K. J. Smith, G. R. DuManoir, C. M. Tallon, D. R. Perkins, S. Piombo, M. Stembridge, D. M. Cooper, S. Radom‐Aizik, P. N. Ainslie, A. M. McManus   +11 more
wiley   +1 more source

A Rare Case of Severe Metabolic Alkalosis with Unusual Hyperproteinemia Treated with Continuous Renal Replacement Therapy and Regional Citrate Anticoagulation

Case Reports in Nephrology and Dialysis, 2018
A 23-year-old woman was referred to the tertiary centre with acute kidney injury and severe metabolic alkalosis following an accidental ethylene glycol poisoning.
Vojtěch Matoušek, Ivan Herold, Lenka Holanová, Martin Balík   +3 more
doaj   +1 more source

Hypokalemic rhabdomyolysis: a rare manifestation of primary aldosteronism [PDF]

, 2015
Rhabdomyolysis is a rare presentation of hypokalemia, although muscle weakness is a well-known manifestation of hypokalemia. Primary aldosteronism is characterized by hypertension, suppressed plasma renin activity, increased aldosterone excretion and ...
CONCISTRE, ANTONIO, FIACCO, FEDERICA, LETIZIA, Claudio, MARINELLI, CRISTIANO, MITTERHOFER, Anna Paola, PETRAMALA, LUIGI, TINTI, FRANCESCA, UMBRO, ILARIA, ZAVATTO, ASSUNTA, ZINGARETTI, VIVIANA   +9 more
core  

Elevated carotid body tonic activity contributes to ventilatory acclimatization and de‐acclimatization to high altitude at rest and during exercise

The Journal of Physiology, EarlyView.
Abstract figure legend Participants spent 13 days at high altitude (3800 m), where the reduced inspired oxygen pressure (↓PiO2$ \downarrow {P_{{\mathrm{i}}{{\mathrm{O}}_2}}}$) which elicited ventilatory acclimatization and increased inhibition of ventilation by transient hyperoxia (ΔV̇E$\Delta {\dot V_{\mathrm{E}}}$).
Ayechew A. Getu, L. Madden Brewster, Travis D. Gibbons, James D. Anholm, Michael Stembridge, Philip N. Ainslie, Jay M. J. R. Carr   +6 more
wiley   +1 more source

Blood buffers: The viewpoint of a biochemist

Physiological Reports
Mammalian blood is a very complex system whose multiple physiological roles require that its pH is maintained constant, in spite of the necessity of carrying over 15 moles of CO2 a day from the tissues to the lungs. The blood pH is maintained constant by
Andrea Bellelli
doaj   +1 more source