Resistance Training Reduces Skeletal Muscle Work Efficiency in Weight‐Reduced and Non–Weight‐Reduced Subjects
Autor: | Alpana P. Shukla, Elizabeth Shane, Rochelle L. Goldsmith, Wei Shen, Martica Heaner, Michael Rosenbaum, Elinor Naor, Rudolph L. Leibel, Louis J. Aronne, P. Christian Schulze |
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Rok vydání: | 2018 |
Předmět: |
Adult
Male medicine.medical_specialty Endocrinology Diabetes and Metabolism Medicine (miscellaneous) 030209 endocrinology & metabolism Work efficiency weight regain Overweight Article 03 medical and health sciences 0302 clinical medicine Endocrinology Weight loss Internal medicine Weight Loss medicine Humans Resting energy expenditure Obesity skeletal muscle exercise intervention Muscle Skeletal Nutrition and Dietetics business.industry Resistance training Skeletal muscle Resistance Training 030229 sport sciences Middle Aged medicine.disease medicine.anatomical_structure Female Bicycle ergometer medicine.symptom business |
Zdroj: | Obesity (Silver Spring, Md.) |
ISSN: | 1930-739X 1930-7381 |
Popis: | Objective The objective of this study is to determine whether resistance training is similarly effective in reducing skeletal muscle efficiency and increasing strength in weight-reduced and maximal weight subjects. Methods This study examined the effects of supervised resistance exercise on skeletal muscle in 14 individuals with overweight and obesity sustaining a 10% or greater weight loss for over 6 months and a phenotypically similar group of 15 subjects who had not reduced weight and were weight stable at their maximal lifetime body weight. We assessed skeletal muscle work efficiency and fuel utilization (bicycle ergometry), strength (dynamometry), body composition (dual energy x-ray absorptiometry), and resting energy expenditure (indirect calorimetry) before and after 12 weeks of thrice-weekly resistance training. Results Non-weight-reduced subjects were significantly (10%-20%) stronger before and after the intervention than reduced-weight subjects and gained significantly more fat-free mass with a greater decline in percentage of body fat than weight-reduced subjects. Resistance training resulted in similar significant decreases (~10%) in skeletal muscle work efficiency at low-level exercise and ~10% to 20% increases in leg strength in both weight-reduced and non-weight-reduced subjects. Conclusions Resistance training similarly increases muscle strength and decreases efficiency regardless of weight loss history. Increased resistance training could be an effective adjunct to reduced-weight maintenance therapy. |
Databáze: | OpenAIRE |
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