Research graph
References from Reliability and validity of the International FItness Scale (IFIS): A systematic review and meta-analysis. Local targets link to admitted publications; unresolved targets remain external evidence.
Unresolved reference
2018 · External reference
Cardiorespiratory fitness and health in children and adolescents: an overview of systematic reviews with meta-analyses representing over 125 000 observations covering 33 health-related outcomes
10.1136/bjsports-2024-109184 · 2025 · External reference
Is muscular fitness associated with future health benefits in children and adolescents? A systematic review and meta-analysis of longitudinal studies
10.1007/s40279-019-01098-6 · 2019 · External reference
Effects of resistance training on academic outcomes in school-aged youth: a systematic review and meta-analysis
10.1007/s40279-023-01881-6 · 2023 · External reference
Cardiorespiratory fitness is a strong and consistent predictor of morbidity and mortality among adults: an overview of meta-analyses representing over 20.9 million observations from 199 unique cohort studies
10.1136/bjsports-2023-107849 · 2024 · External reference
Physical fitness in childhood and adolescence: a powerful marker of health
10.1038/sj.ijo.0803774 · 2008 · External reference
Unresolved reference
2010 · External reference
An update on secular trends in physical fitness of children and adolescents from 1972 to 2015: a systematic review
10.1007/s40279-020-01373-x · 2021 · External reference
Temporal trends in the cardiorespiratory fitness of 2,525,827 adults between 1967 and 2016: a systematic review
10.1007/s40279-018-1017-y · 2019 · External reference
Different types of physical activity and fitness and health in adults: an 18-Year longitudinal study
10.1155/2017/1785217 · 2017 · External reference
Secular trend in the physical fitness of Xinjiang children and adolescents between 1985 and 2014
10.3390/ijerph17072195 · 2020 · External reference
BMI, leisure-time physical activity, and physical fitness in adults in China: results from a series of national surveys, 2000–14
10.1016/s2213-8587(16)00081-4 · 2016 · External reference
International fitness scale (IFIS): construct validity and reliability in women with fibromyalgia: the al-Ándalus project
10.1016/j.apmr.2015.08.416 · 2016 · External reference
Field-based fitness assessment in young people: the ALPHA health-related fitness test battery for children and adolescents
10.1136/bjsm.2010.075341 · 2011 · External reference
The international fitness scale (IFIS): usefulness of self-reported fitness in youth
10.1093/ije/dyr039 · 2011 · External reference
The physical self-perception profile: devlopment and preliminary validation
10.1123/jsep.11.4.408 · 1989 · External reference
Validity and reliability of the self-reported physical fitness (SRFit) survey
10.1123/jpah.2012-0264 · 2014 · External reference
Validity of the international fitness scale “IFIS” in older adults
10.1016/j.exger.2017.05.001 · 2017 · External reference
Self‐reported and measured cardiorespiratory fitness similarly predict cardiovascular disease risk in young adults
10.1111/j.1600-0838.2012.01454.x · 2013 · External reference
Validity and reliability of the international fItness scale (IFIS) in preschool children
10.1080/17461391.2022.2049884 · 2023 · External reference
The international fitness scale (IFIS): a valid tool to assess physical fitness in French children
2024 · External reference
Associations of sport participation, muscle-strengthening exercise and active commuting with self-reported physical fitness in school-aged children
2022 · External reference
Validity, reliability and sensitivity of measures of sporting performance
10.2165/00007256-200838040-00003 · 2008 · External reference
Reliability: what is it, and how is it measured?
10.1016/s0031-9406(05)61211-4 · 2000 · External reference
Reliability of questionnaire the international fitness scale: a systematic review and meta-analysis
10.31744/einstein_journal/2020rw5232 · 2020 · External reference
International fitness Scale—Ifis: validity and association with health‐related quality of life in pregnant women
10.1111/sms.13584 · 2020 · External reference
Self-reported (IFIS) versus measured physical fitness, and their associations to cardiometabolic risk factors in early pregnancy
10.1038/s41598-021-02149-7 · 2021 · External reference
Reliability of international fitness scale (IFIS) in Chinese children and adolescents
10.3390/children9040531 · 2022 · External reference
Validity evidence based on the internal structure of the brazilian version of the 'International Fitness Scale' (IFIS)
2025 · External reference
The PRISMA 2020 statement: an updated guideline for reporting systematic reviews
10.1016/j.ijsu.2021.105906 · 2021 · External reference
COSMIN Risk of bias checklist for systematic reviews of patient-reported outcome measures
10.1007/s11136-017-1765-4 · 2018 · External reference
Unresolved reference
2018 · External reference
The measurement of observer agreement for categorical data
10.2307/2529310 · 1977 · External reference
Is self-reported physical fitness useful for estimating fitness levels in children and adolescents? A reliability and validity study
10.3390/medicina55060286 · 2019 · External reference
Construct validity and test–retest reliability of the international fitness scale (IFIS) in Colombian children and adolescents aged 9–17.9 years: the FUPRECOL study
10.7717/peerj.3351 · 2017 · External reference
Construct validity and test–retest reliability of the I nternational F itness S cale (IFIS) in S panish children aged 9–12 years
10.1111/sms.12267 · 2015 · External reference
A basic introduction to fixed‐effect and random‐effects models for meta‐analysis
10.1002/jrsm.12 · 2010 · External reference
Measuring inconsistency in meta-analyses
10.1136/bmj.327.7414.557 · 2003 · External reference
Research into questionnaire design: a summary of the literature
10.2501/s147078530920120x · 2010 · External reference
A systematic review of reliability and objective criterion-related validity of physical activity questionnaires
10.1186/1479-5868-9-103 · 2012 · External reference
Validity and reliability evidence for motor competence assessments in children and adolescents: a systematic review
10.1080/02640414.2020.1756674 · 2020 · External reference
A basic introduction to fixed‐effect and random‐effects models for meta‐analysis
10.1002/jrsm.12 · ExternalCitation · doi-reference
COSMIN Risk of bias checklist for systematic reviews of patient-reported outcome measures
10.1007/s11136-017-1765-4 · ExternalCitation · doi-reference
Temporal trends in the cardiorespiratory fitness of 2,525,827 adults between 1967 and 2016: a systematic review
10.1007/s40279-018-1017-y · ExternalCitation · doi-reference
Is muscular fitness associated with future health benefits in children and adolescents? A systematic review and meta-analysis of longitudinal studies
10.1007/s40279-019-01098-6 · ExternalCitation · doi-reference
An update on secular trends in physical fitness of children and adolescents from 1972 to 2015: a systematic review
10.1007/s40279-020-01373-x · ExternalCitation · doi-reference
Effects of resistance training on academic outcomes in school-aged youth: a systematic review and meta-analysis
10.1007/s40279-023-01881-6 · ExternalCitation · doi-reference
International fitness scale (IFIS): construct validity and reliability in women with fibromyalgia: the al-Ándalus project
10.1016/j.apmr.2015.08.416 · ExternalCitation · doi-reference
Validity of the international fitness scale “IFIS” in older adults
10.1016/j.exger.2017.05.001 · ExternalCitation · doi-reference
The PRISMA 2020 statement: an updated guideline for reporting systematic reviews
10.1016/j.ijsu.2021.105906 · ExternalCitation · doi-reference
Reliability: what is it, and how is it measured?
10.1016/s0031-9406(05)61211-4 · ExternalCitation · doi-reference
BMI, leisure-time physical activity, and physical fitness in adults in China: results from a series of national surveys, 2000–14
10.1016/s2213-8587(16)00081-4 · ExternalCitation · doi-reference
Self-reported (IFIS) versus measured physical fitness, and their associations to cardiometabolic risk factors in early pregnancy
10.1038/s41598-021-02149-7 · ExternalCitation · doi-reference
Physical fitness in childhood and adolescence: a powerful marker of health
10.1038/sj.ijo.0803774 · ExternalCitation · doi-reference
Validity and reliability evidence for motor competence assessments in children and adolescents: a systematic review
10.1080/02640414.2020.1756674 · ExternalCitation · doi-reference
Validity and reliability of the international fItness scale (IFIS) in preschool children
10.1080/17461391.2022.2049884 · ExternalCitation · doi-reference
The international fitness scale (IFIS): usefulness of self-reported fitness in youth
10.1093/ije/dyr039 · ExternalCitation · doi-reference
Self‐reported and measured cardiorespiratory fitness similarly predict cardiovascular disease risk in young adults
10.1111/j.1600-0838.2012.01454.x · ExternalCitation · doi-reference
Construct validity and test–retest reliability of the I nternational F itness S cale (IFIS) in S panish children aged 9–12 years
10.1111/sms.12267 · ExternalCitation · doi-reference
International fitness Scale—Ifis: validity and association with health‐related quality of life in pregnant women
10.1111/sms.13584 · ExternalCitation · doi-reference
Validity and reliability of the self-reported physical fitness (SRFit) survey
10.1123/jpah.2012-0264 · ExternalCitation · doi-reference
The physical self-perception profile: devlopment and preliminary validation
10.1123/jsep.11.4.408 · ExternalCitation · doi-reference
Field-based fitness assessment in young people: the ALPHA health-related fitness test battery for children and adolescents
10.1136/bjsm.2010.075341 · ExternalCitation · doi-reference
Cardiorespiratory fitness is a strong and consistent predictor of morbidity and mortality among adults: an overview of meta-analyses representing over 20.9 million observations from 199 unique cohort studies
10.1136/bjsports-2023-107849 · ExternalCitation · doi-reference
Cardiorespiratory fitness and health in children and adolescents: an overview of systematic reviews with meta-analyses representing over 125 000 observations covering 33 health-related outcomes
10.1136/bjsports-2024-109184 · ExternalCitation · doi-reference
Measuring inconsistency in meta-analyses
10.1136/bmj.327.7414.557 · ExternalCitation · doi-reference
Different types of physical activity and fitness and health in adults: an 18-Year longitudinal study
10.1155/2017/1785217 · ExternalCitation · doi-reference
A systematic review of reliability and objective criterion-related validity of physical activity questionnaires
10.1186/1479-5868-9-103 · ExternalCitation · doi-reference
Validity, reliability and sensitivity of measures of sporting performance
10.2165/00007256-200838040-00003 · ExternalCitation · doi-reference
The measurement of observer agreement for categorical data
10.2307/2529310 · ExternalCitation · doi-reference
Research into questionnaire design: a summary of the literature
10.2501/s147078530920120x · ExternalCitation · doi-reference
Reliability of questionnaire the international fitness scale: a systematic review and meta-analysis
10.31744/einstein_journal/2020rw5232 · ExternalCitation · doi-reference
Reliability of international fitness scale (IFIS) in Chinese children and adolescents
10.3390/children9040531 · ExternalCitation · doi-reference
Secular trend in the physical fitness of Xinjiang children and adolescents between 1985 and 2014
10.3390/ijerph17072195 · ExternalCitation · doi-reference
Is self-reported physical fitness useful for estimating fitness levels in children and adolescents? A reliability and validity study
10.3390/medicina55060286 · ExternalCitation · doi-reference
Construct validity and test–retest reliability of the international fitness scale (IFIS) in Colombian children and adolescents aged 9–17.9 years: the FUPRECOL study
10.7717/peerj.3351 · ExternalCitation · doi-reference
