Abstract
Vitamin D status is associated with muscle strength and performance in older adults. To examine the additive effects of vitamin D3 supplementation during resistance training, 100 seniors (65–85 years) participated in a 16-week intervention. Besides a daily dose of 400 mg of calcium, participants received either 800 IU vitamin D3 per day (VDD), 50,000 IU vitamin D3 per month (VDM) or nothing (CON). After the initial loading phase of four weeks, all groups started a 10-week resistance training program. Assessments of 25-hydroxyvitamin D (25(OH)D) status, muscle strength endurance (30-s chair stand and arm curl tests), aerobic capacity (6-min walk test) and functional mobility (gait speed and timed up and go test) were undertaken at baseline, after four weeks and at the end of the study. 25(OH)D status significantly improved in VDD and VDM, but not in CON (time x group: p = 0.021), as 15.2% of CON, 40.0% of VDD and 61.1% of VDM reached vitamin D sufficiency (>30 ng/mL; p = 0.004). Chair stand test, arm curl test, 6-min walk test, gait speed and timed up and go test improved over the whole intervention period (p < 0.05), however only chair stand and arm curl test were selectively affected by resistance training (p < 0.001). Neither muscle strength endurance, nor functional mobility or aerobic capacity were modulated by vitamin D supplementation. Therefore, the mere amelioration of 25(OH)D status of older adults does not lead to an additive effect on muscular performance during RT.
Original language | English |
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Article number | 86 |
Pages (from-to) | 1-14 |
Number of pages | 14 |
Journal | Nutrients |
Volume | 14 |
Issue number | 1 |
Early online date | 26 Dec 2021 |
DOIs | |
Publication status | Published - Jan 2022 |
Austrian Fields of Science 2012
- 303028 Sport science
- 303009 Nutritional sciences
- 302020 Gerontology
Keywords
- 25-hydroxy-vitamin D
- D DEFICIENCY
- FITNESS
- LOWER-EXTREMITY FUNCTION
- MASS
- METAANALYSIS
- MOBILITY
- MUSCLE STRENGTH
- PHYSICAL PERFORMANCE
- POWER
- SKELETAL-MUSCLE
- mobility
- older adults
- physical fitness
- resistance training
- vitamin D supplementation
- Mobility
- Older adults
- Physical fitness
- Resistance training
- Vitamin D supplementation
- Calcifediol/blood
- Vitamin D Deficiency/drug therapy
- Humans
- Male
- Resistance Training
- Cholecalciferol/administration & dosage
- Muscle Strength/drug effects
- Aged, 80 and over
- Female
- Double-Blind Method
- Aged
- Dietary Supplements
- Vitamins/administration & dosage