The Experts below are selected from a list of 273 Experts worldwide ranked by ideXlab platform

Mark I. Talan - One of the best experts on this subject based on the ideXlab platform.

  • the effect of exercise training in Cold on shivering and nonshivering thermogenesis in adult and aged c57bl 6j mice
    Experimental Gerontology, 1998
    Co-Authors: Vladimir I. Shefer, Mark I. Talan
    Abstract:

    To understand the mechanisms of improvement of Cold-induced heat production in aged mice following exercise training, the relative contributions of shivering and nonshivering thermogenesis to Cold-induced metabolic responses were assessed in adult and aged C57BL/6J male mice, which inhabited sedentarily at room temperature, or were subjected either to a regimen of moderate intensity exercise training at 6 degrees C, or to sedentary repeated exposures to the same temperature. The main findings were that (1) aged mice had greater Cold-induced nonshivering thermogenesis, but lower shivering than adult mice; (2) exercise training in a Cold Environment enhanced Cold-induced nonshivering thermogenesis in adult mice, but suppressed it in aged animals; (3) exercise training in a Cold Environment increased shivering thermogenesis in both age groups, but this increase was much greater in aged mice; (4) the increase of Cold-induced shivering thermogenesis was mainly responsible for increased Cold tolerance in aged mice after exercise training in a Cold Environment.

  • The effect of exercise training in Cold on shivering and nonshivering thermogenesis in adult and aged C57BL/6J mice.
    Experimental Gerontology, 1998
    Co-Authors: Vladimir I. Shefer, Mark I. Talan
    Abstract:

    To understand the mechanisms of improvement of Cold-induced heat production in aged mice following exercise training, the relative contributions of shivering and nonshivering thermogenesis to Cold-induced metabolic responses were assessed in adult and aged C57BL/6J male mice, which inhabited sedentarily at room temperature, or were subjected either to a regimen of moderate intensity exercise training at 6 degrees C, or to sedentary repeated exposures to the same temperature. The main findings were that (1) aged mice had greater Cold-induced nonshivering thermogenesis, but lower shivering than adult mice; (2) exercise training in a Cold Environment enhanced Cold-induced nonshivering thermogenesis in adult mice, but suppressed it in aged animals; (3) exercise training in a Cold Environment increased shivering thermogenesis in both age groups, but this increase was much greater in aged mice; (4) the increase of Cold-induced shivering thermogenesis was mainly responsible for increased Cold tolerance in aged mice after exercise training in a Cold Environment.

  • THE EFFECT OF EXERCISE TRAINING IN A Cold Environment ON THERMOREGULATION IN ADULT AND AGED C57BL/6J MICE
    Experimental gerontology, 1997
    Co-Authors: Vladimir I. Shefer, Mark I. Talan
    Abstract:

    We studied the effect of exercise training in Cold Environment (six weeks of daily, one-hour runs on a treadmill at ambient temperature of 6 +/- 1 degrees C at 60-65% of VO2max) on Cold-induced metabolic heat production, heat loss, and Cold tolerance in adult and aged C57BL/6J male mice. In adult mice, exercise training in Cold Environment resulted in greater Cold-induced heat production and Cold tolerance without changes in heat loss, similar to the effects of daily Cold exposure without exercise. In aged mice, daily Cold exposures did not affect Cold tolerance and Cold-induced heat production, but exercise training in the Cold resulted in greater Cold-induced heat production and Cold tolerance. Heat loss in aged mice increased similarly after both repeated Cold exposures and exercise training in the Cold. Therefore, mechanisms of effect of exercise training on Cold tolerance are different in adult and aged animals. Exercise training in Cold Environment does not affect Cold-induced heat production and Cold tolerance in adult mice, but improves them in aged animals.

Vladimir I. Shefer - One of the best experts on this subject based on the ideXlab platform.

  • the effect of exercise training in Cold on shivering and nonshivering thermogenesis in adult and aged c57bl 6j mice
    Experimental Gerontology, 1998
    Co-Authors: Vladimir I. Shefer, Mark I. Talan
    Abstract:

    To understand the mechanisms of improvement of Cold-induced heat production in aged mice following exercise training, the relative contributions of shivering and nonshivering thermogenesis to Cold-induced metabolic responses were assessed in adult and aged C57BL/6J male mice, which inhabited sedentarily at room temperature, or were subjected either to a regimen of moderate intensity exercise training at 6 degrees C, or to sedentary repeated exposures to the same temperature. The main findings were that (1) aged mice had greater Cold-induced nonshivering thermogenesis, but lower shivering than adult mice; (2) exercise training in a Cold Environment enhanced Cold-induced nonshivering thermogenesis in adult mice, but suppressed it in aged animals; (3) exercise training in a Cold Environment increased shivering thermogenesis in both age groups, but this increase was much greater in aged mice; (4) the increase of Cold-induced shivering thermogenesis was mainly responsible for increased Cold tolerance in aged mice after exercise training in a Cold Environment.

  • The effect of exercise training in Cold on shivering and nonshivering thermogenesis in adult and aged C57BL/6J mice.
    Experimental Gerontology, 1998
    Co-Authors: Vladimir I. Shefer, Mark I. Talan
    Abstract:

    To understand the mechanisms of improvement of Cold-induced heat production in aged mice following exercise training, the relative contributions of shivering and nonshivering thermogenesis to Cold-induced metabolic responses were assessed in adult and aged C57BL/6J male mice, which inhabited sedentarily at room temperature, or were subjected either to a regimen of moderate intensity exercise training at 6 degrees C, or to sedentary repeated exposures to the same temperature. The main findings were that (1) aged mice had greater Cold-induced nonshivering thermogenesis, but lower shivering than adult mice; (2) exercise training in a Cold Environment enhanced Cold-induced nonshivering thermogenesis in adult mice, but suppressed it in aged animals; (3) exercise training in a Cold Environment increased shivering thermogenesis in both age groups, but this increase was much greater in aged mice; (4) the increase of Cold-induced shivering thermogenesis was mainly responsible for increased Cold tolerance in aged mice after exercise training in a Cold Environment.

  • THE EFFECT OF EXERCISE TRAINING IN A Cold Environment ON THERMOREGULATION IN ADULT AND AGED C57BL/6J MICE
    Experimental gerontology, 1997
    Co-Authors: Vladimir I. Shefer, Mark I. Talan
    Abstract:

    We studied the effect of exercise training in Cold Environment (six weeks of daily, one-hour runs on a treadmill at ambient temperature of 6 +/- 1 degrees C at 60-65% of VO2max) on Cold-induced metabolic heat production, heat loss, and Cold tolerance in adult and aged C57BL/6J male mice. In adult mice, exercise training in Cold Environment resulted in greater Cold-induced heat production and Cold tolerance without changes in heat loss, similar to the effects of daily Cold exposure without exercise. In aged mice, daily Cold exposures did not affect Cold tolerance and Cold-induced heat production, but exercise training in the Cold resulted in greater Cold-induced heat production and Cold tolerance. Heat loss in aged mice increased similarly after both repeated Cold exposures and exercise training in the Cold. Therefore, mechanisms of effect of exercise training on Cold tolerance are different in adult and aged animals. Exercise training in Cold Environment does not affect Cold-induced heat production and Cold tolerance in adult mice, but improves them in aged animals.

Jens Wahlström - One of the best experts on this subject based on the ideXlab platform.

Yutaka Tochihara - One of the best experts on this subject based on the ideXlab platform.

  • Heat and water vapour transfer of protective clothing systems in a Cold Environment, measured with a newly developed sweating thermal manikin
    European Journal of Applied Physiology, 2004
    Co-Authors: Takako Fukazawa, Kiyotsugu Kano, Takeshi Matsuoka, Yutaka Tochihara
    Abstract:

    A moveable sweating thermal manikin has recently been developed. Thermal and water-vapour resistances of three kinds of Cold-protective clothing ensembles, laminated with polytetrafluoroethylene, polyurethane and without a laminate were measured, with the aid of the manikin in a Cold Environment of 5°C with a relative humidity of 70% and an air velocity of around 1.5 m s^−1. Two sweating rates of 65 and 130 g m^−2 h^−1 were employed. Supplied heat fluxes in both of the sweat rates ranged from 350 W m^−2 to 400 W m^−2. To maintain a comfortable condition, the skin wettedness ( w ) (mean weighted value) had to be kept at ≤0.6. The measurements obtained from the manikin when testing the three ensembles were w =0.3 (approximately) for the low sweat rate and w ≥0.6 for the high sweat rate, irrespective of the property differences among the ensembles. In addition, the condensation in the ensembles in comparison with those calculated from an analytical equation is discussed. Condensation mass fluxes in the ensembles obtained byexperiment and those from the calculation agreed sufficiently well. Thus, distribution of the condensation in the ensembles was estimated using the equation.

Lage Burström - One of the best experts on this subject based on the ideXlab platform.