Serum Vitamin D Level Associates With Handgrip Muscle Strength Among Ethiopian Schoolchildren: A Cross-Sectional Study

Wakayo, Tolassa; Belachew, Tefera; Whiting, Susan J.

doi:10.1177/0379572117724545

Cited by 12 publications

(12 citation statements)

References 46 publications

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“…These findings are in line with another study conducted in healthy children and adolescents [29]. A study showed that handgrip strength was positively associated with serum levels of vitamin D [30]. It has also been observed that handgrip strength is a predictive factor for bone density in female adolescents and that having a low level of strength indicates poor health in terms of bone density [31].…”

Section: Discussionsupporting

confidence: 89%

Physical fitness and nutritional status in female adolescents with anorexia nervosa

2020

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Objective This study aimed to determine whether physical fitness is related to nutritional status in a sample of female adolescents with anorexia nervosa, to contrast the nourished and undernourished patients, and to compare the physical fitness in these patients with normative data of healthy subjects stratified by age and gender. Methods Nutritional status was determined using the body mass index Z-score, fat mass, fat-free mass (bioelectrical impedance analysis), and the Controlling Nutritional Status score in 15 anorexic adolescents with 14.3±1.6 years. Physical fitness was assessed using the ALPHA-Fitness Battery (handgrip strength, standing broad jump, 4x10m shuttle run, and 20m shuttle run tests). Results Handgrip strength was significantly associated with all variables of nutritional status, except with the three blood components of the Controlling Nutritional Status score. The undernourished anorexic patients showed significantly worse physical fitness than the nourished anorexic patients in all tests, except in the standing broad jump and the 4x10m shuttle run tests. The physical fitness tests of the female anorexic adolescents showed scores significantly worse than those of the normative European female adolescent population. Conclusion The observation of female adolescents with anorexia nervosa showed associations between higher physical fitness levels and better nutritional statuses. Handgrip strength and 20m shuttle run tests may be options of additional indicators of undernutrition in anorexic female adolescents. The undernourished anorexic patients showed worse physical fitness than the nourished ones. According to normative data for healthy sex- and agematched adolescents, physical fitness is severely impaired in anorexic female adolescents.

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Section: Discussionsupporting

confidence: 89%

Physical fitness and nutritional status in female adolescents with anorexia nervosa

2020

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“…There is still lack of knowledge in terms of the role of vitamin D for upper limb muscle strength in the general population. The studies of Haslam et al [50] and Wang et al [51] showed that vitamin D de ciency is related to loss of hand grip strength in the older population and there is evidence that vitamin D also has a key role in younger age groups for upper limb muscle strength [6,[52][53][54].…”

Section: Discussionmentioning

confidence: 99%

Seven-month Wintertime Supplementation of 1200 IU Vitamin D Has No Effect on Hand Grip Strength in Young, Physically Active Males: A Randomized, Controlled Study.

Rips¹,

Toom²,

Kull³

et al. 2021

Preprint

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BackgroundThere has been a growing interest in the role of vitamin D for the well-being and physical performance of humans; however, there is a lack of long-term supplementation studies performed on members of the young, physically active, male population.The hypothesis of the study was that vitamin D supplementation during wintertime will decrease the prevalence of critically low vitamin D blood serum levels and increase hand grip strength during the winter season among young male conscripts. Study DesignLongitudinal, triple-blinded, randomized, placebo-controlled trial. MethodsFifty-three male conscripts from the Estonian Army were randomized into two groups: 27 to an intervention group and 26 to a placebo group. The groups were comparable in terms of their demographics. The intervention group received 1200 IU (30 µg) capsules of vitamin D3 and the control group received placebo oil capsules once per day. The length of the follow-up was seven months, from October 2016 until April 2017. Blood serum vitamin D (25(OH)D), parathyroid hormone (PTH), calcium (Ca), ionized calcium (Ca-i), testosterone and cortisol values and hand grip strength were measured four times during the study period. ResultsThe mean 25(OH)D level decreased significantly in the control group to a critically low level during the study, with the lowest mean value of 22 nmol/l found in March 2017. At that time point, 65% in the control group vs 15% in the intervention group had 25(OH)D values of less than 25 nmol/l (p < 0.001). In the intervention group the levels of 25(OH)D did not change significantly during the study period. All other blood tests revealed no significant differences at any time point. The corresponding result was found for hand grip strength at all time points. ConclusionLong-term vitamin D supplementation during wintertime results in fewer conscripts in the Estonian Army with critically low serum vitamin D (25(OH)D) levels during the winter season. However, this did not influence their physical performance in the form of the hand grip strength test. Trial registrationClinicalTrials.gov Identifier: NCT04359524. Registered 20 April 2020 - Retrospectively registered. https://register.clinicaltrials.gov

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“…Observational studies on vitamin D and muscle strength in children and adolescents have shown positive results in four (15)(16)(17)(18), and negative results in one (19). Taken together, the large RCT meta-analysis in adults and the majority of observational studies in different populations favor an impact of vitamin D on muscle strength.…”

Section: B Vitamin Dmentioning

confidence: 96%

“…In our interpretation, weight became a stronger expression for muscle and bone mass after adjusting for body fat percentage, analogous to lean body mass, or fat free mass. The impact of body fat percentage has only been investigated in a few other studies in children with similar results (7,16). In further studies on muscular strength in children, we recommend adjustment with a measure of body fat in addition to weight and height and stratification by sex.…”

Section: A Hand Grip and Explanatory Variablesmentioning

confidence: 99%

“…In adults, vitamin D deficiency (s-25OHD <25 nmol/L) can lead to vitamin D-associated myopathy before the development of bone disease (14). Only a few studies researched the association between vitamin D and muscle strength in children/adolescents and only one study included children down to 4 and 5 years of age, but results were inconclusive (15)(16)(17)(18)(19)(20)(21)(22).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

S-25OHD Is Associated With Hand Grip Strength and Myopathy at 5 Years in Girls: An Odense Child Cohort Study

Al-Jwadi

Jespersen

Dalgård

et al. 2018

The Journal of Clinical Endocrinology &Amp; Metabolism

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Serum Vitamin D Level Associates With Handgrip Muscle Strength Among Ethiopian Schoolchildren: A Cross-Sectional Study

Cited by 12 publications

References 46 publications

Physical fitness and nutritional status in female adolescents with anorexia nervosa

Physical fitness and nutritional status in female adolescents with anorexia nervosa

Seven-month Wintertime Supplementation of 1200 IU Vitamin D Has No Effect on Hand Grip Strength in Young, Physically Active Males: A Randomized, Controlled Study.

S-25OHD Is Associated With Hand Grip Strength and Myopathy at 5 Years in Girls: An Odense Child Cohort Study

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