Objective measures of moderate to vigorous physical activity are associated with higher distal limb bone strength among elderly men

Abstract Background Prior research examining the relationship between cannabis use, sedentary behavior, and physical activity has generated conflicting findings, potentially due to biases in the self-reported measures used to assess physical activity. This study aimed to more precisely explore the relationship between cannabis use and sedentary behavior/physical activity using objective measures. Methods Data were obtained from the 2005–2006 National Health and Nutrition Examination Survey. A total of 2,092 participants (ages 20–59; 48.8% female) had accelerometer-measured sedentary behavior, light physical activity, and moderate-to-vigorous physical activity. Participants were classified as light, moderate, frequent, or non-current cannabis users depending on how often they used cannabis in the previous 30 days. Multivariable linear regression estimated minutes in sedentary behavior/physical activity by cannabis use status. Logistic regression modeled self-reported moderate-to-vigorous physical activity in relation to current cannabis use. Results Fully adjusted regression models indicated that current cannabis users’ accelerometer-measured sedentary behavior did not significantly differ from non-current users. Frequent cannabis users engaged in more physical activity than non-current users. Light cannabis users had greater odds of self-reporting physical activity compared to non-current users. Conclusions This study is the first to evaluate the relationship between cannabis use and accelerometer-measured sedentary behavior and physical activity. Such objective measures should be used in other cohorts to replicate our findings that cannabis use is associated with greater physical activity and not associated with sedentary behavior in order to fully assess the potential public health impact of increases in cannabis use.

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Bouts of Vigorous Physical Activity and Bone Strength Accrual During Adolescence

Pediatric Exercise Science ◽

10.1123/pes.2017-0043 ◽

2017 ◽

Vol 29 (4) ◽

pp. 465-475 ◽

Cited By ~ 14

Author(s):

Leigh Gabel ◽

Heather M. Macdonald ◽

Lindsay Nettlefold ◽

Heather A. McKay

Keyword(s):

Physical Activity ◽

Bone Strength ◽

Fixed Effects ◽

Vigorous Physical Activity ◽

Random Effect ◽

Quantitative Computed Tomography ◽

Distal Tibia ◽

Height Velocity ◽

Element Analysis ◽

Metabolic Equivalents

Purpose:We examined the influence of vigorous physical activity (VPA) bout frequency on bone strength accrual across adolescence, independent of total volume of VPA.Methods:We measured VPA (6 metabolic equivalents; total volume and bout frequency <5 min in duration) annually using waist-worn accelerometers (ActiGraph GT1M) in 309 adolescents (9–20 y at baseline: 99, <13 y; 126, 13–18 y; 84, >18 y) over a maximum of 4 years. We applied finite element analysis to high-resolution peripheral quantitative computed tomography scans of the distal tibia (8% site) to estimate bone strength (failure load; F.Load, Newtons). We fit a mixed effects model with maturity offset (years from age at peak height velocity) as a random effect and sex, ethnicity, tibia length, lean body mass, and VPA (volume and bout frequency) as fixed effects.Results:VPA volume and bout frequency were positively associated with F.Load across adolescence; however, VPA volume did not predict F.Load once VPA bout frequency was included in the model. Participants in the upper quartile of VPA bout frequency (∼33 bouts per day) had 10% (500 N) greater F.Load across adolescence compared with participants in the lowest quartile (∼9 bouts per day;P = .012). Each additional daily bout of VPA was associated with 21 N greater F.Load, independent of total volume of VPA.Conclusion:Frequent VPA should be promoted for optimal bone strength accrual.

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Sedentary time negates the positive influence of moderate-to-vigorous physical activity but not vigorous physical activity on bone strength in adolescent girls

Bone Abstracts ◽

10.1530/boneabs.4.oc3 ◽

2015 ◽

Author(s):

Vina Tan ◽

Heather Macdonald ◽

Heather McKay

Keyword(s):

Physical Activity ◽

Bone Strength ◽

Adolescent Girls ◽

Sedentary Time ◽

Vigorous Physical Activity ◽

Positive Influence

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Habitual levels of higher, but not medium or low, impact physical activity are positively related to lower limb bone strength in older women: findings from a population-based study using accelerometers to classify impact magnitude

Osteoporosis International ◽

10.1007/s00198-016-3863-5 ◽

2016 ◽

Vol 28 (10) ◽

pp. 2813-2822 ◽

Cited By ~ 28

Author(s):

K. Hannam ◽

K. C. Deere ◽

A. Hartley ◽

U. A. Al-Sari ◽

E. M. Clark ◽

...

Keyword(s):

Physical Activity ◽

Older Women ◽

Bone Strength ◽

Lower Limb ◽

Population Based ◽

Population Based Study ◽

Limb Bone

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Moderate to vigorous physical activity and impact loading independently predict variance in bone strength at the tibia but not at the radius in children

Applied Physiology Nutrition and Metabolism ◽

10.1139/apnm-2018-0406 ◽

2019 ◽

Vol 44 (3) ◽

pp. 326-331 ◽

Cited By ~ 2

Author(s):

Anthony M. Kehrig ◽

Kelsey M. Björkman ◽

Nazeem Muhajarine ◽

James D. Johnston ◽

Saija A. Kontulainen

Keyword(s):

Physical Activity ◽

Bone Strength ◽

Vigorous Physical Activity ◽

Quantitative Computed Tomography ◽

Peripheral Quantitative Computed Tomography ◽

Children And Youth ◽

Strength Development ◽

Linear Regression Models ◽

Muscle Area ◽

Objective Recording

The objectives of this study were (i) to assess whether daily minutes of moderate to vigorous physical activity (MVPA) or vigorous physical activity (VPA) and impact counts (acceleration peaks ≥3.9g) independently predict variance in bone strength in children and youth and (ii) to estimate bone strength gain associated with increases in daily MVPA, VPA, or impact counts. We recorded 7-day activity of 49 participants (mean age 11.0 years, SD 1.7) using accelerometers and estimated radius and tibia bone strength using peripheral quantitative computed tomography. We used linear regression models adjusted for sex, body mass, and muscle area to address our objectives. Daily MVPA (mean 50 min, SD 23) and VPA (mean 17 min, SD 11) or impacts (mean 71 counts, SD 59) did not predict variance in radius strength. Daily VPA (β = 0.24) predicted variance in tibia strength at the distal and shaft sites, and shaft strength was also predicted by MVPA (β = 0.20) and impact counts (β = 0.21). Our models estimated a 3%–6%, 4%, or 4%–11% gain in tibia strength after increasing daily MVPA by 10–20 min, VPA by 5 min, or impacts by 30–100 counts, respectively. In conclusion, daily minutes of MVPA or VPA and impact counts are independent predictors of tibia but not radius strength. Objective recording of activities associated with forearm bone strength and trials testing the efficacy of increasing daily MVPA, VPA, and related impacts on bone strength development in children and youth are warranted.

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Difference Between Self-Reported and Accelerometer Measured Moderate-to-Vigorous Physical Activity in Youth

Pediatric Exercise Science ◽

10.1123/pes.22.4.523 ◽

2010 ◽

Vol 22 (4) ◽

pp. 523-534 ◽

Cited By ~ 36

Author(s):

Allana G.W. LeBlanc ◽

Ian Janssen

Keyword(s):

Physical Activity ◽

Vigorous Physical Activity ◽

Systematic Difference ◽

Self Report ◽

Objective Measures ◽

The Difference

We examined differences between objective (accelerometer) and subjective (self-report) measures of moderate-to-vigorous physical activity (MVPA) in youth. Participants included 2761 youth aged 12–19 years. Within each sex and race group, objective and self-reported measures of MVPA were poorly correlated (R2 = .01–.10). Self-reported MVPA values were higher than objective values (median: 42.4 vs. 15.0 min/d). 65.4% of participants over-reported their MVPA by 35 min/d. The difference between self-reported and objective measures was not influenced by sex, age, or race. There was, however, a systematic difference such that inactive participants over-reported their MVPA to the greatest extent.

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No Difference in Physical Activity Associated with Cannabis Use Status in a Nationally Representative Sample of U.S. Adults

10.21203/rs.3.rs-38024/v1 ◽

2020 ◽

Author(s):

Lydia Q. Ong ◽

John Bellettiere ◽

Citlali Alvarado ◽

Paul Chavez ◽

Vincent Berardi

Keyword(s):

Physical Activity ◽

Sedentary Behavior ◽

Vigorous Physical Activity ◽

Health Impact ◽

Cannabis Use ◽

Cannabis User ◽

Objective Measures ◽

Nationally Representative ◽

Objectively Measured ◽

The Relationship

Abstract Background: Prior research examining the relationship between cannabis use, sedentary behavior, and physical activity has generated conflicting findings, potentially due to biases in the self-reported measures used to assess physical activity. This study aimed to more precisely explore the relationship between cannabis use and sedentary behavior/physical activity using objective measures. Methods: Data were obtained from the 2005-2006 National Health and Nutrition Examination Survey. 2,092 participants (ages 20-59; 48.8% female) had accelerometer-measured sedentary behavior, light physical activity, and moderate-to-vigorous physical activity. Participants were classified as a current cannabis user if they reported any use over the previous 30 days. Multivariable linear regression estimated minutes engaged in sedentary behavior/physical activity for current versus non-current cannabis users. Logistic regression modeled self-reported moderate-to-vigorous physical activity in relation to current cannabis use. Results: Fully-adjusted regression models indicated that current cannabis users’ objectively-measured sedentary behavior/physical activity did not significantly differ from non-current users. There were no significant associations between self-reported moderate-to-vigorous physical activity and cannabis use. Conclusions: This study is the first to evaluate the relationship between cannabis use and accelerometer-measured sedentary behavior and physical activity. Such objective measures should be used in other cohorts to replicate our finding that current cannabis use is not significantly associated with sedentary behavior/physical activity in order to fully assess the potential public health impact of recent increases in cannabis use.

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Physical Activity Coparticipation Among Parent–Young-Child Dyads

Pediatric Exercise Science ◽

10.1123/pes.2019-0213 ◽

2020 ◽

Vol 32 (3) ◽

pp. 132-139

Author(s):

Deirdre Dlugonski ◽

Katrina D. DuBose ◽

Christine M. Habeeb ◽

Patrick Rider

Keyword(s):

Physical Activity ◽

Contextual Information ◽

Vigorous Physical Activity ◽

Objective Measures ◽

Future Studies ◽

Physical Activity Interventions ◽

Parents And Children ◽

Family Based ◽

Activity Questionnaires ◽

Parent Child

Purpose: This study examined patterns of physical activity coparticipation among parent–child (2–5 y) dyads. Method: The dyads (N = 47; 51% mother–child) each wore a Bluetooth-enabled accelerometer for 8 days to measure physical activity and physical activity coparticipation. The parents completed demographic and self-reported family physical activity questionnaires. Results: The parent–child dyads spent 145 (79) minutes per day in-proximity according to the Bluetooth-enabled accelerometers. The majority (90%) of parent–child in-proximity time was spent with the parent and child engaged in some combination of sedentary or light activities. Child light, moderate, and vigorous physical activity was not associated with parent light (P = .12) or moderate to vigorous physical activity (P = .45), but was positively associated with parent–child in-proximity active minutes (light, moderate, and vigorous) (P < .01). Children in the highest tertile of parent–child physical activity coparticipation engaged in more daily moderate to vigorous physical activity compared with children in the lowest tertile (72.7 vs 50.3 min). There was a positive, statistically significant association between self-reported and objective measures of physical activity coparticipation (r = .47, P = .001). Conclusion: Children who engaged in the most physical activity with their parent had the highest moderate to vigorous physical activity. Future studies should continue to provide contextual information about how parents and children spend their time together to improve family-based physical activity interventions.

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