Body fat attenuates muscle mass catabolism among physically active humans in temperate and cold high altitude environments
Bibliographic Data
| ID | 19459404 |
|---|---|
| Authors | C Ocobock (0000-0002-6949-2029, University at Albany, State University of New York, corresponding author), Cara J Ocobock (University at Albany SUNY Albany New York) |
| Year | 2017 |
| Volume | 29 |
| Issue | 5 |
| Publication date | 2017-09-10 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | American Journal of Human Biology (JOURNAL) |
| Journal identifiers | ISSN: 1042-0533 • E-ISSN: 1520-6300 |
| Publisher | Wiley (PUBLISHER • GB) |
| DOI | 10.1002/ajhb.23013 |
| PMID | 28467016 |
| OpenAlex | W2610333967 |
| Language | EN |
| Citations received | 7 |
| References cited | 39 |
OBJECTIVE: Typical diet plans are based on an individual's body mass; however, body composition may be important to consider when an individual is in a negative energy balance. This study examines if high initial body fat and dietary macronutrient content reduce muscle mass catabolism during excursions in temperate and cold high altitude environments. METHODS: Subjects-53 healthy, un-acclimated volunteers (37 males and 16 females)-took part in 12-16 week-long outdoor education courses in moderately high altitude temperate and cold climates in the western United States. Body mass, body fat percentage, fat mass, and muscle mass were measured before and after each excursion. Total energy expenditure and dietary intake were also measured. RESULTS: In temperate and cold environments, both sexes lost significant amounts of body mass. In temperate climates both sexes lost a significant amount of fat mass, but not muscle mass. In cold climates, there was no significant change in fat mass for either sex; however, females gained muscle mass while males lost muscle mass. In both climates subjects with lower initial body fat percentages lost significantly more muscle mass than subjects with higher initial body fat percentages. There was no significant relationship between macronutrient intake and muscle mass loss for either sex. CONCLUSION: These results suggests that during a negative energy balance dietary macronutrient content cannot abate the loss of muscle mass, but body fat may have a protective effect. This information should be used to improve individualized diets based on body composition, not body mass
Biology · Body weight · Catabolism · Effects of high altitude on humans · Fat mass · Metabolism · Muscle mass · Temperate climate · Adipose Tissue and Metabolism · Cardiovascular and exercise physiology · Chemistry · High Altitude and Hypoxia · Mathematics · Anatomy · Ecology · Endocrinology · Physiology
Sex differences and shifts in body composition, physical activity, and total energy expenditure across a 3‐month expedition
Reindeer herders from subarctic Finland exhibit high total energy expenditure and low energy intake during the autumn herd roundup
How Reindeer Herders Cope with Harsh Winter Conditions in Northern Finland
Trajectory Analysis of the Four‐Year Changes in Body Composition and Bone Mineral Characteristics Among Highly Competitive Male University Long‐Distance Runners
Nutrition, hydration and supplementation considerations for mountaineers in high-altitude conditions
Sex differences in daily activity intensity and energy expenditure and their relationship to cortisol among BaYaka foragers from the Congo Basin
Human Energy Expenditure in Anthropology and Beyond
| Citations per year | 1.17 |
|---|---|
| Citation span | 2020 - 2025 (6) |
| Highly cited | No |