Results 141 to 150 of about 1,958 (187)

Bioimpedance assessment of hypohydration

Medicine & Science in Sports & Exercise, 1999
This study examined the utility of bioimpedance spectroscopy (BIS) for assessing total body water (TBW) changes associated with moderate (6-7% TBW), hypertonic (HH), and isotonic (IH) hypohydration.The TBW of nine men was measured using BIS (TBWBIS) when euhydrated (EU) and during HH and IH.
C, O'Brien, C J, Baker-Fulco, A J, Young, M N, Sawka   +3 more
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Urinary and hematologic indexes of hypohydration

Journal of Applied Physiology, 1987
As part of a large-scale field feeding system test we were able to collect and study hundreds of aliquots of overnight urine samples obtained immediately prior to a fasting blood sample on days 1, 20, and 44 of the field test. The large number of experimental samples (greater than 650) and concomitant collection of blood and urine aliquots along with ...
R. P. Francesconi, R. W. Hubbard, P. C. Szlyk, D. Schnakenberg, D. Carlson, N. Leva, I. Sils, L. Hubbard, V. Pease, J. Young, al. et   +10 more
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Repeated familiarisation with hypohydration attenuates the performance decrement caused by hypohydration during treadmill running

Applied Physiology, Nutrition, and Metabolism, 2014
This study examined the effect of repeated familiarisation to hypohydration on hypohydrated exercise performance. After familiarisation with the exercise protocol, 10 recreationally active males completed a euhydrated (EU-pre) and hypohydrated (HYPO-pre) trial, which involved a 45-min steady state run at 75% peak oxygen uptake (45SS) followed by a 5 ...
Joseph, Fleming, Lewis J, James
openaire   +2 more sources

Altered Brain Structure With Preserved Cortical Motor Activity After Exertional Hypohydration: A MRI Study

Journal of Applied Physiology, 2019
Hypohydration exceeding 2% body mass can impair endurance capacity. It is postulated that the brain could be perturbed by hypohydration, leading to impaired motor performance.
Xiang Ren Tan, Jason Kai Wei Lee
exaly   +2 more sources

Hypohydration Does Not Alter Standing Balance

Motor Control, 2013
We examined the effect of body water deficits on standing balance and sought to determine if plasma hyperosmolality (Posm) and/or volume reduction (%ΔVplasma) exerted independent effects. Nine healthy volunteers completed three experimental trials which consisted of a euhydration (EUH) balance test, a water deficit session and a hypohydration (HYP ...
Joseph F, Seay, Brett R, Ely, Robert W, Kenefick, Shane G, Sauer, Samuel N, Cheuvront   +4 more
openaire   +2 more sources

The effects of hypohydration and fatigue on neuromuscular activation performance

Applied Physiology, Nutrition, and Metabolism, 2013
This study investigated the effects of hypohydration by fluid restriction on voluntary and evoked indices of neuromuscular performance at a functional joint angle. Measures of static volitional peak force (2–3–s maximal muscle actions) and evoked peak twitch force, electromechanical delay, and rate of force development were obtained from the knee ...
Minshull, Claire, James, Lewis
openaire   +3 more sources

Alteration of aminoglycoside antibiotic ototoxicity by hyper- and hypohydration

American Journal of Otolaryngology, 1981
The ototoxicities of tobramycin sulfate and gentamicin sulfate were investigated in guinea pigs under conditions of normal, increased, and decreased hydration. Increased hydration was associated with no decline in the amplitude of the cochlear microphonics, a lesser decline in the eighth nerve action potentials and lesser damage to the organ of Corti ...
J, Prazma, S D, Ferguson, S A, Kidwell, H G, Garrison, A, Drake, J, Fischer   +5 more
openaire   +2 more sources

IMPLICATIONS OF THE HYPOHYDROUS HISTORY OF MARS

1979
We have shown that clays, carbonates, α-Fe 2 O 3 , and Fe 3 O 4 . impart an alkaline state to aqueous solutions that govern the rate of decomposition of H 2 O 2 . In the presence of these materials singly, the production of 14 CO 2 from the oxidative decarboxylation process catalyzed by γ-Fe 2 O 3 is strongly inhibited.
V.I. Oyama, M.E. Lehwalt, B.J. Berdahl
openaire   +1 more source

Effect of primary hypohydration on physical work capacity

International Journal of Biometeorology, 1988
Physical work capacity (PWC180) was assessed with different levels of hypohydration in 25 heat-acclimatized male volunteers in hot dry (45°C DB, 30% RH) and hot humid (39°C DB, 60% RH) conditions equated to a heat stress level of 34°C on the WBGT scale.
G, Pichan, R K, Gauttam, O S, Tomar, A C, Bajaj   +3 more
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Temperature regulation and hypohydration: a singular view

Journal of Applied Physiology, 1979
Body temperatures of exercising humans who have been denied water are elevated when compared to hydrated controls. The simplest “explanation” for the elevated temperature is a decrease in sensitivity of the sweating mechanism. This and similar “explanations” do not direct attention to basic causes but only the result(s) of more fundamental aspects of ...
openaire   +2 more sources