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Health + well-being
Published in Rob Fleming, Saglinda H Roberts, Sustainable Design for the Built Environment, 2019
Rob Fleming, Saglinda H Roberts
Physical health in general is also affected. Exposure to daylight changes our heart rhythm, the interval between beats, and the ability to recover faster, all leading to less stress and more focused cognitive functioning. Vitamin D, produced by sunlight hitting the skin, is essential for calcium absorption improving bone formation, and it also strengthens the immune system and macrophage cells that rid the body of inflammation and infection.
Weekly Vitamin D3 supplementation improves aerobic performance in combat sport athletes
Published in European Journal of Sport Science, 2021
Andrew Marley, Marie Clare Grant, John Babraj
We demonstrate for the first time the impact of supraphysiological supplementation with vitamin D3 on aerobic performance outcomes in combat sports. The most effective dose examined is 50,000IU.week−1 and there is no advantage to increasing dose on performance measures. Given the magnitude of improvements seen in this study for both upper and lower body performance then supplementation with high dose vitamin D3 should be recommended to recreational combat athletes. However, vitamin D toxicity, although rare, can be life-threatening with symptoms including apathy, vomiting, polyuria, polydipsia, gastrointestinal cramps, elevated blood calcium and kidney damage (Marcinowska-Suchowierska, Kupisz-Urbańska, Łukaszkiewicz, Płudowski, & Jones, 2018). As such, supplementation should be undertaken under the guidance of a trained dietician. Nevertheless, it appears that six weeks of supplementation of up to 110,000IU’s is safe and causes no adverse effects with six weeks of 50,000IU’s of vitamin D supplementation recommended as optimal to reverse deficiency (Maughan et al, 2018) and convey performance benefits to recreational combat sport athletes.
Mechanistic links between vitamin deficiencies and diabetes mellitus: a review
Published in Egyptian Journal of Basic and Applied Sciences, 2021
Tajudeen O. Yahaya, AbdulRahman B. Yusuf, Jamilu K. Danjuma, Bello M. Usman, Yahaya M. Ishiaku
Vitamin D (also called ‘calciferol’) is a fat-soluble vitamin that occurs naturally in some foods and is also available as additives and dietary supplements [64]. Fatty fish, including salmon, tuna, mackerel, trout, and fish liver oils are among notable sources of vitamin D [64]. Furthermore, vitamin D is synthesized by the body when the skin absorbs ultraviolet rays from the sun and stimulates vitamin D synthesis [64]. However, vitamin D obtained from foods, ultraviolet rays, and food additives are biologically inactive and must pass through two hydroxylation processes in the body to become active [64]. The first hydroxylation occurs in the liver, where vitamin D is converted to 25-hydroxyvitamin D [25 (OH) D], also known as ‘calcidiol’. The second hydroxylation occurs primarily in the kidney and results in the metabolically active 1,25-dihydroxyvitamin D [125OH], also known as “calcitriol [64].
Bone health among indoor female athletes and associated factors; a cross-sectional study
Published in Research in Sports Medicine, 2020
Bostjan Jakse, Damir Sekulic, Barbara Jakse, Ivan Cuk, Dorica Sajber
Vitamin D is essential for bone health since adequate vitamin D status in the body helps with the absorption of calcium, and insufficient intake results not only in the classical deficiency diseases of rickets and osteomalacia but also in increased bone metabolism and enhanced fracture risk (Laird, Ward, McSorley, Strain, & Wallace, 2010; Malczewska-Lenczowska et al., 2018). It is also important to note that vitamin D deficiency is associated with musculoskeletal pain and muscle weakness (Quadri et al., 2016). For athletes in particular, such a deficiency may impair their training and performance, prolong recovery and increase the risk of injury (Ogan & Pritchett, 2013; Quadri et al., 2016). A recent meta-analysis including 23 studies with 2013 athletes from all around the world found that 56% of athletes had vitamin D inadequacy (Farrokhyar et al., 2015).