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Questions and Answers
Which muscle groups were studied in the analysis?
Which muscle groups were studied in the analysis?
- Abdominals and obliques
- Biceps and triceps
- Hamstrings and quadriceps (correct)
- Glutes and calves
What factors influence muscle-specific atrophy?
What factors influence muscle-specific atrophy?
- Exercise and diet
- Genetics and environmental factors
- Muscle activity level, fiber type, sex, and timeline of aging (correct)
- Age and gender
Why is more muscle-specific information needed?
Why is more muscle-specific information needed?
- To understand functional deficits that develop with aging (correct)
- To create a new type of exercise program for seniors
- To develop a cure for age-related muscle atrophy
- To improve athletic performance in older adults
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Study Notes
- Age-related skeletal muscle atrophy is muscle group-specific.
- Only a few specific muscles have been investigated in this area.
- A review provides a comprehensive summary of age-related skeletal muscle atrophy in a muscle-specific manner.
- 47 cross-sectional studies were analyzed, including 982 young and 1,003 old individuals.
- Nine muscle groups were studied: elbow extensors, elbow flexors, paraspinals, psoas, hip adductors, hamstrings, quadriceps, dorsiflexors, and triceps surae.
- Muscle-specific atrophy rate was determined for each subcomponent muscle in the hamstrings, quadriceps, and triceps surae.
- There was more than a fivefold difference between the least and most atrophying muscles.
- Muscle activity level, muscle fiber type, sex, and timeline of the aging process all influence muscle-specific atrophy.
- More muscle-specific information is needed to understand functional deficits that develop with aging.
- Muscle-specific interventions can improve the quality of life of aging individuals.
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