Evidence map›Paper›PMID 32857128›Full record

Trial reportThe journals of gerontology. Series A, Biological sciences and medical sciences2020

Long-term Effects of Calcium β-Hydroxy-β-Methylbutyrate and Vitamin D3 Supplementation on Muscular Function in Older Adults With and Without Resistance Training: A Randomized, Double-blind, Controlled Study.

John A Rathmacher, Lisa M Pitchford, Paul Khoo, Hector Angus, James Lang, Kristin Lowry, Carol Ruby, Alex C Krajek, John C Fuller, Rick L Sharp

Open access · hybridAbstract readRandomized Controlled Trial
In one paragraph

Trial report in The journals of gerontology. Series A, Biological sciences and medical sciences, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 4 pooled it
1.9field-weighted citation impact, top 15% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 4 syntheses or guidelines pooled it, 37 citations in OpenAlex.

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  11. International society of sports nutrition position stand: β-hydroxy-β-methylbutyrate (HMB).Journal of the International Society of Sports Nutrition · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 3 institutions in 1 country.

John A RathmacherMTI BioTech, Inc., Iowa State University Research Park, Ames.
Lisa M PitchfordMTI BioTech, Inc., Iowa State University Research Park, Ames.
Paul KhooDepartment of Kinesiology, Iowa State University, Ames.
Hector AngusDepartment of Kinesiology, Iowa State University, Ames.
James LangDepartment of Kinesiology, Iowa State University, Ames.
Kristin LowryDepartment of Physical Therapy, Des Moines University.
Carol RubyDepartment of Physical Therapy, Des Moines University.
Alex C KrajekDepartment of Physical Therapy, Des Moines University.
John C FullerMetabolic Technologies, LLC, Missoula, MT.
Rick L SharpDepartment of Kinesiology, Iowa State University, Ames.
Iowa State University · USDes Moines University · USMetabolic Technologies (United States) · US

Funding

The Vanderbilt Institute for Clinical and Translational Research (VICTR)UL1TR000445 · NCATS · VANDERBILT UNIVERSITY MEDICAL CENTER · PI BERNARD, GORDON RAPHAEL · 2012 to 2016
$41.4M
Nutritional Intervention for Age-Related Muscular Function and Strength LossesR44AG034722 · NIA · METABOLIC TECHNOLOGIES, INC. · PI RATHMACHER, JOHN A · 2010 to 2017
$948k
NCATS NIH HHS UL1 TR000445NIA NIH HHS R44 AG034722
6 · The paper itself

Abstract

The primary aim of this study was to determine whether supplementation with calcium β-hydroxy-β-methylbutyrate (HMB) and vitamin D3 (D) would enhance muscle function and strength in older adults. Older adults over 60 years of age with insufficient circulating 25-hydroxy-vitamin D (25OH-D) levels were enrolled in a double-blinded controlled 12-month study. Study participants were randomly assigned to treatments consisting of: (a) Control + no exercise, (b) HMB+D + no exercise, (c) Control + exercise, and (d) HMB+D + exercise. The study evaluated 117 participants via multiple measurements over the 12 months that included body composition, strength, functionality, and questionnaires. HMB+D had a significant benefit on lean body mass within the nonexercise group at 6 months (0.44 ± 0.27 kg, HMB+D vs -0.33 ± 0.28 kg, control, p < .05). In nonexercisers, improvement in knee extension peak torque (60°/s) was significantly greater in HMB+D-supplemented participants than in the nonsupplemented group (p = .04) at 3 months, 10.9 ± 5.7 Nm and -5.2 ± 5.9 Nm, respectively. A composite functional index, integrating changes in handgrip, Get Up, and Get Up and Go measurements, was developed. HMB+D + no exercise resulted in significant increases in the functional index compared with those observed in the control + no exercise group at 3 (p = .03), 6 (p = .04), and 12 months (p = .04). Supplementation with HMB+D did not further improve the functional index within the exercising group. This study demonstrated the potential of HMB and vitamin D3 supplementation to enhance muscle strength and physical functionality in older adults, even in individuals not engaged in an exercise training program.

Indexed as

Resistance TrainingAgedBody CompositionCalciumDouble-Blind MethodFemaleHumansMaleMiddle AgedMuscle StrengthSurveys and QuestionnairesValeratesVitamin Dbeta-hydroxyisovaleric acidCalciumValeratesVitamin DAgingFunctionalityMuscle strengthVitamin Dβ-Hydroxy-β-methylbutyrate

Identifiers

PMID32857128
PMCPMC7566440
OpenAlexW3082806478

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.