Trial reportJournal of the International Society of Sports Nutrition2019
Effects of placebo on bench throw performance of Paralympic weightlifting athletes: a pilot study.
Trial report in Journal of the International Society of Sports Nutrition, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 3 of them syntheses that pooled 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.
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.
Who cites it
14 citing papers in PubMed, 3 syntheses or guidelines pooled it, 22 citations in OpenAlex.
- Pooled it
- Placebo and Nocebo Effects on Sports and Exercise Performance: A Systematic Literature Review Update.Nutrients · 2024Pooled it
- Ergogenic Effects of Caffeine on Ballistic (Throwing) Performance: A Meta-Analytical Review.Nutrients · 2022Pooled it
- Trial
- Effects of Capacitive-Resistive Electric Transfer on Sports Performance in Paralympic Swimmers: A Stopped Randomized Clinical Trial.International journal of environmental research and public health · 2022Trial
- Effect of Vitamin B12 Injection on the Vocal Performance of Professional Singers: A Randomized, Double-blind, Placebo-Controlled, Crossover Trial.JAMA otolaryngology-- head & neck surgery · 2021Trial
- Placebo Effect of Caffeine on Maximal Strength and Strength Endurance in Healthy Recreationally Trained Women Habituated to Caffeine.Nutrients · 2020Trial
- Trial
- Exploring the potential synergistic pharmacological and psychological effects of caffeine on exercise performance: a placebo-balanced study.Biology of sport · 2026Article
- Cold water immersion after a soccer match: Does the placebo effect occur?Frontiers in physiology · 2023Article
- Are sEMG, Velocity and Power Influenced by Athletes' Fixation in Paralympic Powerlifting?International journal of environmental research and public health · 2022Article
- Effects of Caffeine on Resistance Exercise: A Review of Recent Research.Sports medicine (Auckland, N.Z.) · 2021Review
- Analysis of Grip Amplitude on Velocity in Paralympic Powerlifting.Journal of functional morphology and kinesiology · 2021Article
- Caffeine Ingestion Enhances Repetition Velocity in Resistance Exercise: A Randomized, Crossover, Double-Blind Study Involving Control and Placebo Conditions.Journal of human kinetics · 2020Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe aim of the present study was to analyse the effects of placebo on bench throw performance in Paralympic weightlifting athletes.
methodsThe study involved four Paralympic weightlifting male athletes (age: 40.25 ± 9.91 years, weight: 60.5 ± 8.29 kg, height: 1.60 ± 0.15 m) that visited the laboratory in three occasions, separated by 72 h. In the first session, the athletes were tested for bench press one repetition maximum (1RM). The other two sessions were performed in a randomized counter-balanced order and involved bench throw tests performed either after taking placebo while being informed that the capsule contained caffeine or without taking any substance (control). The bench throw tests were performed with loads corresponding to 50, 60, 70 and 80% of the bench press 1RM.
resultsAccording to the results, mean velocity (∆: 0.08 m/s, ES 0.36, p < 0.05) and mean propulsive velocity (∆: 0.11 m/s, ES 0.49, p < 0.05) at 50% of 1RM were significantly higher during placebo than control (p < 0.05). However, there were no difference between control and placebo for 60, 70 and 80% of 1RM (p > 0.05).
conclusionOur results suggest that placebo intake, when the athletes were informed they were taking caffeine, might be an efficient strategy to improve the performance of explosive movements in Paralympic weightlifting athletes when using low-loads. This brings the possibility of using placebo in order to increase performance, which might reduce the risks associated with ergogenic aids, such as side-effects and positive doping testing.
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What OpenQuestion holds
Registered trials
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.