Vitamin D
Study Goal
The researchers aimed to investigate the effects of vitamin D supplementation on responses to resistance training, particularly in older adults and individuals with chronic diseases like COPD.
Results Summary
Resistance training over 13 weeks increased muscle strength (13%), muscle mass (9%), and endurance performance (23% for one-legged, 8% for whole-body), while also reducing visceral fat (-6%) and LDL levels. The abstract does not provide conclusive results on the impact of vitamin D supplementation.
Population
95 male and female participants (68 ± 5 years), including healthy individuals (n=71) and those with COPD (n=24).
Effective Dosage
Not specified in the abstract.
Duration
13 weeks.
Interactions
None mentioned.
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
resistance training | increase | muscle strength | male and female participants (healthy, n = 71; COPD, n = 24; age 68 ± 5 years) | 13% ± 8% | increased | #1 |
resistance training | increase | muscle mass | male and female participants (healthy, n = 71; COPD, n = 24; age 68 ± 5 years) | 9% ± 8% | increased | #2 |
resistance training | increase | endurance performance (one-legged) | male and female participants (healthy, n = 71; COPD, n = 24; age 68 ± 5 years) | 23% ± 15% | increased | #3 |
resistance training | increase | endurance performance (whole-body) | male and female participants (healthy, n = 71; COPD, n = 24; age 68 ± 5 years) | 8% ± 7% | increased | #4 |
resistance training | decrease | visceral fat | male and female participants (healthy, n = 71; COPD, n = 24; age 68 ± 5 years) | -6% ± 21% | associated with changes in | #5 |
BACKGROUND: Lifestyle therapy with resistance training is a potent measure to counteract age-related loss in muscle strength and mass. Unfortunately, many individuals fail to respond in the expected manner. This phenomenon is particularly common among older adults and those with chronic diseases (e.g. chronic obstructive pulmonary disease, COPD) and may involve endocrine variables such as vitamin D. At present, the effects of vitamin D supplementation on responses to resistance training remain largely unexplored. METHODS: Ninety-five male and female participants (healthy, n = 71; COPD, n = 24; age 68 ± 5 years) were randomly assigned to receive either vitamin D RESULTS: Overall, 13 weeks of resistance training increased muscle strength (13% ± 8%), muscle mass (9% ± 8%), and endurance performance (one-legged, 23% ± 15%; whole-body, 8% ± 7%), assessed as weighted combined factors, and were associated with changes in health variables (e.g. visceral fat, -6% ± 21%; [LDL] CONCLUSIONS: Vitamin D