More muscle response when have adequate vitamin D

An excellent study showed why vitamin D helps muscle response.

The image below was photographed from a Vitamin D encyclopedia edited by Feldman and published in 2005.
The original information, as you can see on the image, was published in 2000
Summary: The muscle force increased by 50% when the person had adequate level of vitamin D

The same electrical pulse was given to a leg muscle before, during, and after the addition of vitamin D to their diet
People with low level of vitamin D initially had the least reaction to the pulse: N = 50 approx
The strength of the reaction to the pulse increased over months of adding vitamin D ( does not mention how much vitamin D)
until the strength of the reaction (the kick) was measured to be N = 75 approx.

This implies that elderly will fall less if they have enough vitamin D
The muscles will put out 50% more force when given a brain signal to react fall type situation.

This increased force is probably due to the vitamin D improving the Calcium metabolism, which is essential for muscle activity.

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See also VitaminDWiki

• all items in the Sports and D category 243 items
• Vitamin D supplementation increases strength of lower muscles – Meta-analysis April 2019

Falls and Fractures category in VitaminDWiki contains the following

• 225 items in FALLS and FRACTURES
• see also Overview Seniors and Vitamin D
• Overview Fractures and Falls and Vitamin D
• Deaths due to falls doubled in just a decade (age-adjusted, perhaps decreased vitamin D) – June 2019
• Low trauma bone fractures in seniors – considering Vitamin D loading dose for all, without testing – Nov 2019
• Preventing Falls in Older Adults – Vitamin D combination is the best - JAMA Meta-analysis Nov 2017
• Falls cut in half by 100,000 IU vitamin D monthly - RCT 2016
• Vitamin D prevents falls – majority of meta-analyses conclude – meta-meta analysis Feb 2015
• Vitamin D and fractures – 24 meta-analyses and counting – Dec 2014

Hip fracture

• Search VitaminDWiki for "HIP FRACTURE" 191 items not in PDF as of July 2020
• A call to action: Vitamin D for hip fracture (50,000 weekly for 8 weeks, then bi-weekly – Holick July 2020
• Recommends vitamin D after hip fracture ( but not enough and no-bone building co-factors) – May 2021
• Risk factors for death after hip fracture surgery – 7 of the 8 are associated with low vitamin D – Aug 2020
• 3.5 X higher risk of death 2 years after hip fracture surgery if low vitamin D – Jan 2020
• Hip fracture recovery best with home exercise plus Vitamin D – RCT Dec 2018
• Hip fracture 58 percent more likely if low vitamin D – meta-analysis March 2017
• Fracture risk 40 percent higher risk if low Vitamin D - June 2019
• 1 in 3 died after hip fracture but only 1 in 14 if add Vitamin D and exercise – RCT April 2017