Maximum oxygen consumption during exercise and cold exposure in deer mice, Peromyscus maniculatus

1984 ◽  
Vol 55 (3) ◽  
pp. 367-377 ◽  
Author(s):  
Mark A. Chappell
Keyword(s):  
Oxygen Consumption ◽  
Cold Exposure ◽  
Peromyscus Maniculatus ◽  
Deer Mice ◽  
Maximum Oxygen Consumption

BOUND AND FREE CORTICOSTEROID IN THE PLASMA OF TWO SUBSPECIES OF DEER MICE (PEROMYSCUS MANICULATUS) AFTER EXPOSURE TO A LOW AMBIENT TEMPERATURE

1964 ◽  
Vol 31 (1) ◽  
pp. 75-80 ◽  
Author(s):  
B. E. ELEFTHERIOU
Keyword(s):  
Thin Layer ◽  
Ambient Temperature ◽  
Cold Exposure ◽  
Peromyscus Maniculatus ◽  
Thyroid Stimulating Hormone ◽  
Significant Rise ◽  
Deer Mice ◽  
Adrenal System ◽  
Layer Chromatography ◽  
Tsh Levels

SUMMARY Paper and thin-layer chromatography were used to identify corticosterone as the only glucocorticosteroid in two subspecies of deer mice (Peromyscus maniculatus bairdii and P. m. gracilis). Free and bound corticosterone levels in plasma were determined fluorimetrically in both subspecies after exposure to cold (2 ± 0·5°) for 15 days. Initially, there was a significant rise in free and bound corticosterone in the plasma after cold exposure with return to the levels before cold exposure within 3 days in P. m. bairdii and 10 days in P. m. gracilis. The differential response to cold by P. m. gracilis is discussed in terms of a possible shift in pituitary adrenocorticotrophin (ACTH) and thyroid stimulating hormone (TSH) levels and decreased adrenal output. In general it is concluded that subspecies bairdii possesses a more sensitive pituitary-adrenal system than gracilis, and that the former has also greater ability to acclimatization to cold than the latter.

Responses to Lactation and Cold Exposure by Deer Mice (Peromyscus maniculatus)

2000 ◽  
Vol 73 (5) ◽  
pp. 547-556 ◽  
Author(s):  
Kimberly A. Hammond ◽  
Deborah M. Kristan
Keyword(s):  
Cold Exposure ◽  
Peromyscus Maniculatus ◽  
Deer Mice

CARDIORESPIRATORY SYSTEM UNDER BICYCLE ERGOMETER TEST IN SKIERS WITH DIFFERENT TRAINING STATUS (KOMI REPUBLIC)

2019 ◽  
pp. 76-84
Author(s):  
Yu.G. Solonin ◽  
T.P. Loginova ◽  
I.O. Garnov ◽  
A.L. Markov ◽  
A.A. Chernykh ◽  
...  
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Komi Republic ◽  
Rate Pressure Product ◽  
Training Status ◽  
Maximum Oxygen Consumption ◽  
Bicycle Ergometry ◽  
Cardiorespiratory System ◽  
Unit Pulse ◽  
Ski Racers

The aim of the study is to examine the impact of training status on ski racers (Komi Republic) at rest and under bicycle ergometry evaluating their cardiorespiratory system parameters. Materials and Methods. The authors examined male ski racers with different training status: 22 first-rank sportsmen, 22 candidates for Master of Sports and 22 Masters of Sports. Athletes underwent bicycle ergometry loads up to refusal. Oxycon Pro system (Germany) was used. Then authors studied the complex of cardiorespiratory parameters, calculating maximum oxygen consumption and unit physiological cost. Results. At rest and under standard physical load (200 W) Masters of Sports demonstrate significantly increased training status among ski racers in such cardiorespiratory system parameters as heart rate, rate pressure product and oxygen pulse. Under standard physical load (200 W) statistically significant differences between first-rank sportsmen and candidates for Master of Sports are detected by heart rate, rate pressure product, respiration rate, respiratory minute volume and oxygen utilization coefficient. Such deviations indicate differences in training status. Under maximum load, the highest training status is found in Masters of Sports: bicycle ergometry load power and duration; unit pulse, pressor and cardiac cost, bulk and unit values of maximum oxygen consumption. Heart rate values, unit pulse and heart-vent cost indicate a high training status in candidates for Master of Sports under load up to refusal, if compared with first-rank sportsmen. Athletes’ organism under load up to refusal works more efficiently than under moderate load (200 W). The training status in ski racers (Komi Republic) is manifested in the saving cardiorespiratory system functions, both at rest and under standard bicycle ergometry, as well as in parameters of unit physiological cost under loads up to refusal and increased values of maximum oxygen consumption. Keywords: ski racers, Komi Republic, training status, bicycle ergometry loads, cardiorespiratory system, maximum oxygen consumption.

scholarly journals Dehydrogenase-dependent Ethanol Metabolism in Deer Mice (Peromyscus maniculatus) Lacking Cytosolic Alcohol Dehydrogenase

1989 ◽  
Vol 264 (10) ◽  
pp. 5593-5597
Author(s):  
C Norsten ◽  
T Cronholm ◽  
G Ekström ◽  
J A Handler ◽  
R G Thurman ◽  
...  
Keyword(s):  
Alcohol Dehydrogenase ◽  
Peromyscus Maniculatus ◽  
Ethanol Metabolism ◽  
Deer Mice

scholarly journals Zumba®, Fat Mass and Maximum Oxygen Consumption: A Systematic Review and Meta-Analysis

2020 ◽  
Vol 18 (1) ◽  
pp. 105
Author(s):  
Manuel Chavarrias ◽  
Santos Villafaina ◽  
Ana Myriam Lavín-Pérez ◽  
Jorge Carlos-Vivas ◽  
Eugenio Merellano-Navarro ◽  
...  
Keyword(s):  
Systematic Review ◽  
Oxygen Consumption ◽  
Body Mass ◽  
Fat Mass ◽  
Evidence Synthesis ◽  
Meta Analysis ◽  
P Value ◽  
Maximum Oxygen Consumption ◽  
Mass Percentage ◽  
Large Heterogeneity

Background and objectives: Obesity or overweight is associated with many health risk factors and preventable mortality. Even people with normal weight and without history of obesity or overweight should avoid weight gain to reduce health risks factors. In this regard Latin aerobic dances involved in Zumba® practice make this modality motivating for people. Apart from weight loss and VO2peak benefits, Zumba practice is also interesting by the increase in adherence which can also avoid weight regain. The aim was to systematically review the scientific literature about the effects of any randomized intervention of Zumba® practice on total fat mass (%) and maximum oxygen consumption (VO2peak), besides establishing directions for the clinical practice. Evidence acquisition: Two systematic searches were conducted in two electronic databases following the PRISMA guidelines. The eligibility criteria were (a) outcomes: body mass or VO2peak data including mean and standard deviation (SD) before and after Zumba® intervention, (b) study design: randomized controlled trial (RCT) and (c) language: English. GRADE guidelines were used to assess the quality of evidence. A meta-analysis was performed to determine mean differences. Nine and four studies were selected for fat mass percentage and VO2peak in the systematic review, respectively. However, only eight studies for fat mass percentage and three for VO2peak could be included in the meta-analysis. Evidence synthesis: The overall standardized mean difference for fat mass was −0.25 with a 95% CI from −0.67 to 0.16 with a p-value of 0.69, with large heterogeneity. On the other hand, the overall effect size for VO2peak was 0.53 (95% CI from 0.04 to 1.02 with a p-value of 0.03) with large heterogeneity. Conclusions: Based on the evidence, we cannot conclude that Zumba® is effective at reducing body mass but it may improve VO2peak. However, the limited number of studies that met the inclusion criteria makes it too early to reach a definite conclusion, so more research is needed.

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