Abstract
Background: This study sought to explore the dose–response rate/association between aerobic fitness (VO 2max) and self-reported physical activity (PA) and to assess whether this association varies by sex, age and weight status. Methods: VO 2max was assessed using the 20-m shuttle-run test. PA was assessed using the Physical Activity Questionnaire (PAQ) for Adolescents (aged >11 years, PAQ-A) or for Children (aged ≤11 years, PAQ-C). The associations between VO 2max and PAQ were analyzed using analysis of covariance (ANCOVA), adopting PAQ and PAQ 2 as covariates but allowing the intercepts and slope parameters of PAQ and PAQ 2 to vary with the categorical variables sex, age group, and weight status. Results: ANCOVA identified a curvilinear association between VO 2max and PAQ, with positive linear PAQ terms that varied for both sex and weight status but with a negative PAQ 2 term of -0.39 (95% confidence interval (CI): –0.57 to –0.21) that was common for all groups in regard to age, sex, and weight status. These curvilinear (inverted U) associations suggest that the benefits of increasing PA (same dose) on VO 2max is greater when children report lower levels of PA compared to children who report higher levels of PA. These dose–response rates were also steeper for boys and were steeper for lean children compared to overweight/obese children. Conclusion: Health practitioners should be aware that encouraging greater PA (same dose) in inactive and underweight children will result in greater gains in VO 2max (response) compared with their active and overweight/obese counterparts.
Original language | English |
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Pages (from-to) | (In-press) |
Journal | Journal of Sport and Health Science |
Volume | (In-press) |
Early online date | 9 May 2019 |
DOIs | |
Publication status | E-pub ahead of print - 9 May 2019 |
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Bibliographical note
Open Access under a Creative Commons license. Final published version not yet availableKeywords
- Aerobic fitness
- ANCOVA
- curvilinear association
- slope parameters
- weight status
- age
- sex
- Slope parameters
- Sex
- Weight status
- Curvilinear association
ASJC Scopus subject areas
- Physical Therapy, Sports Therapy and Rehabilitation
- Orthopedics and Sports Medicine
Cite this
Modeling the dose–response rate/associations between VO 2max and self-reported Physical Activity Questionnaire in children and adolescents. / Nevill, Alan; Duncan, Michael; Sandercock, Gavin.
In: Journal of Sport and Health Science, Vol. (In-press), 09.05.2019, p. (In-press).Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Modeling the dose–response rate/associations between VO 2max and self-reported Physical Activity Questionnaire in children and adolescents
AU - Nevill, Alan
AU - Duncan, Michael
AU - Sandercock, Gavin
N1 - Open Access under a Creative Commons license. Final published version not yet available
PY - 2019/5/9
Y1 - 2019/5/9
N2 - Background: This study sought to explore the dose–response rate/association between aerobic fitness (VO 2max) and self-reported physical activity (PA) and to assess whether this association varies by sex, age and weight status. Methods: VO 2max was assessed using the 20-m shuttle-run test. PA was assessed using the Physical Activity Questionnaire (PAQ) for Adolescents (aged >11 years, PAQ-A) or for Children (aged ≤11 years, PAQ-C). The associations between VO 2max and PAQ were analyzed using analysis of covariance (ANCOVA), adopting PAQ and PAQ 2 as covariates but allowing the intercepts and slope parameters of PAQ and PAQ 2 to vary with the categorical variables sex, age group, and weight status. Results: ANCOVA identified a curvilinear association between VO 2max and PAQ, with positive linear PAQ terms that varied for both sex and weight status but with a negative PAQ 2 term of -0.39 (95% confidence interval (CI): –0.57 to –0.21) that was common for all groups in regard to age, sex, and weight status. These curvilinear (inverted U) associations suggest that the benefits of increasing PA (same dose) on VO 2max is greater when children report lower levels of PA compared to children who report higher levels of PA. These dose–response rates were also steeper for boys and were steeper for lean children compared to overweight/obese children. Conclusion: Health practitioners should be aware that encouraging greater PA (same dose) in inactive and underweight children will result in greater gains in VO 2max (response) compared with their active and overweight/obese counterparts.
AB - Background: This study sought to explore the dose–response rate/association between aerobic fitness (VO 2max) and self-reported physical activity (PA) and to assess whether this association varies by sex, age and weight status. Methods: VO 2max was assessed using the 20-m shuttle-run test. PA was assessed using the Physical Activity Questionnaire (PAQ) for Adolescents (aged >11 years, PAQ-A) or for Children (aged ≤11 years, PAQ-C). The associations between VO 2max and PAQ were analyzed using analysis of covariance (ANCOVA), adopting PAQ and PAQ 2 as covariates but allowing the intercepts and slope parameters of PAQ and PAQ 2 to vary with the categorical variables sex, age group, and weight status. Results: ANCOVA identified a curvilinear association between VO 2max and PAQ, with positive linear PAQ terms that varied for both sex and weight status but with a negative PAQ 2 term of -0.39 (95% confidence interval (CI): –0.57 to –0.21) that was common for all groups in regard to age, sex, and weight status. These curvilinear (inverted U) associations suggest that the benefits of increasing PA (same dose) on VO 2max is greater when children report lower levels of PA compared to children who report higher levels of PA. These dose–response rates were also steeper for boys and were steeper for lean children compared to overweight/obese children. Conclusion: Health practitioners should be aware that encouraging greater PA (same dose) in inactive and underweight children will result in greater gains in VO 2max (response) compared with their active and overweight/obese counterparts.
KW - Aerobic fitness
KW - ANCOVA
KW - curvilinear association
KW - slope parameters
KW - weight status
KW - age
KW - sex
KW - Slope parameters
KW - Sex
KW - Weight status
KW - Curvilinear association
UR - http://www.scopus.com/inward/record.url?scp=85068116596&partnerID=8YFLogxK
U2 - 10.1016/j.jshs.2019.05.001
DO - 10.1016/j.jshs.2019.05.001
M3 - Article
VL - (In-press)
SP - (In-press)
JO - Journal of Sport and Health Science
JF - Journal of Sport and Health Science
ER -