ArticleJMIR mHealth and uHealth2019
Estimating Maximal Oxygen Uptake From Daily Activity Data Measured by a Watch-Type Fitness Tracker: Cross-Sectional Study.
Article in JMIR mHealth and uHealth, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.
What it found
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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
8 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Exploiting Unsupervised Free-Living Data for Cardiorespiratory Fitness Estimation: Systematic Review and Meta-Analysis.JMIR mHealth and uHealth · 2026Pooled it
- Effect of vitamin DJournal of the International Society of Sports Nutrition · 2023Trial
- Interpretable framework for predicting preoperative cardiorespiratory fitness using wearable data.Computer methods and programs in biomedicine · 2025Article
- Assessing the Accuracy of Smartwatch-Based Estimation of Maximum Oxygen Uptake Using the Apple Watch Series 7: Validation Study.JMIR biomedical engineering · 2024Article
- Accuracy of Heart Rate and Respiratory Rate Measurements Using Two Types of Wearable Devices.Progress in rehabilitation medicine · 2022Article
- Smartphone-recorded physical activity for estimating cardiorespiratory fitness.Scientific reports · 2021Article
- Quantified Self-Using Consumer Wearable Device: Predicting Physical and Mental Health.Healthcare informatics research · 2020Review
- Workers' physical activity data contribute to estimating maximal oxygen consumption: a questionnaire study to concurrently assess workers' sedentary behavior and cardiorespiratory fitness.BMC public health · 2020Article
Corrections and comments
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Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundCardiorespiratory fitness (CRF), an important index of physical fitness, is the ability to inhale and provide oxygen to the exercising muscle. However, despite its importance, the current gold standard for measuring CRF is impractical, requiring maximal exercise from the participants.
objectiveThis study aimed to develop a convenient and practical estimation model for CRF using data collected from daily life with a wristwatch-type device.
methodsA total of 191 subjects, aged 20 to 65 years, participated in this study. Maximal oxygen uptake (VO
resultsaEEmax showed a moderate correlation with VO
conclusionsThis study proposes a CRF estimation method using data collected by a wristwatch-type fitness tracker without any specific protocol for a wide range of the population.
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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.