Effects of physical conditioning on children and adolescents with asthma

Physical Activity Predicts Better Lung Function in Children and Adolescents

PURPOSE

To investigate (1) whether physical activity is associated with lung function in children and adolescents, (2) whether this association is modified by the subjects' weight status, and (3) whether this association is mediated by the body mass index.

METHODS

This is a cross-sectional study including 460 participants aged 7-17 years, randomly selected from 13 public schools in southern Brazil. Collected data included anthropometric measures, physical activity, screen time, and spirometric measures expressed as percent predicted values. Data were analyzed using multiple linear regression and 2-way analysis of variance.

RESULTS

There were positive associations between physical activity and forced vital capacity (β = 3.897, P = .001) and forced expiratory volume in the first second (β = 2.931, P = .021). The effect modification by weight status was not statistically significant (forced vital capacity: Pinteraction = .296 and forced expiratory volume in the first second: Pinteraction = .057). Body mass index did not mediate the association between physical activity and spirometric outcomes (P > .05).

CONCLUSION

Regular physical activity was associated with higher forced vital capacity and forced expiratory volume in the first second in children and adolescents. The observed associations were not modified by weight status nor mediated by body mass index. Our results reinforce the importance of regular physical activity for the development of lung function during childhood and adolescence.

Physical exercise in asthma adolescents: a concept review

Background: Asthma is a frequent pathological condition during childhood and adolescence. Young asthmatics demonstrate decreased aptitude for physical activity and a limited exercise capacity. Lower hospitalisation rates, reduced school absenteeism, fewer medical examinations, and limited use of bronchodilators have been documented in children and adolescents with bronchial asthma who engage in physical exercise regularly. Structured physical exercise protocols should be encouraged as they can work as a synergistic therapeutic option in addition to regular pharmacologic treatment. This article outlines the most suitable exercise training techniques for young patients with bronchial asthma and their effects on health status.

Does Regular Exercise Impact the Lung Function of Healthy Children and Adolescents? A Systematic Review and Meta-Analysis

PURPOSE

To assess the quality of the available evidence on the effect of exercise for the improvement of lung function in healthy children and adolescents.

METHOD

We performed a systematic review and meta-analysis of intervention studies examining the effects of regular exercise on spirometric parameters of healthy children and adolescents aged ≤18 years.

RESULTS

Within the exercise groups, there were significant improvements in forced vital capacity (mean difference: 0.17 L; 95% confidence interval, 0.07 to 0.26; P < .05) and forced expiratory volume in the first second (mean difference: 0.14 L; 95% confidence interval, 0.06 to 0.22; P < .05). Results were consistent across different age groups and duration of interventions. In the between-group analysis, forced vital capacity, forced expiratory volume in the first second, and peak expiratory flow were higher in the exercise group compared with the nonexercise group, but the differences did not reach statistical relevance. There was significant statistical heterogeneity between studies.

CONCLUSION

Regular exercise has the potential to improve lung function parameters in healthy children and adolescents; however, the small number of studies and the heterogeneity between them raise concern about the quality of the currently available evidence. These findings bring to attention the need for well-designed trials addressing this important public health issue.

Physical Activity Among Urban Children with Asthma: Does Sleep Matter?

The present study examined associations between sleep and physical activity among a diverse sample of 97 urban children (ages 7-9) with persistent asthma. Differences in associations were evaluated by race/ethnicity and weight status. The extent to which sleep moderated the association between lung function and physical activity was also evaluated. Generalized linear models were utilized to examine associations. Findings indicated that, among the aggregate sample, more frequent nighttime awakenings were associated with less time spent engaging in moderate-to-vigorous physical activity (MVPA). Important differences in these associations were identified by both race/ethnicity and weight status. Better lung function was associated with, (a) higher levels of MVPA for children with better sleep efficiency and fewer nighttime awakenings, and (b) lower levels of MVPA for children with poorer sleep efficiency and more frequent nighttime awakenings. In short, sleep mattered with respect to children's physical activity levels in this sample.

Translating Promoting Factors and Behavior Change Principles Into a Blended and Technology-Supported Intervention to Stimulate Physical Activity in Children With Asthma (Foxfit): Design Study

Background

Children with asthma can decrease the impact of their disease by improving their physical activity (PA). However, health care providers lack interventions for children with asthma that effectively increase their PA levels and achieve behavior change. A technology-supported approach can positively influence PA and physical functioning in children.

Objective

The aims of this study were to develop a technology-supported intervention that facilitates health care providers in promoting PA for children (aged 8 to 12 years) with asthma and to systematically describe this developmental process.

Methods

Intervention mapping (IM) was applied to develop a blended and technology-supported intervention in cocreation with children with asthma, their parents, and health care providers. In accordance with the IM framework, the following steps were performed: conduct a needs assessment; define the intervention outcome, performance objectives, and change objectives; select theory-based intervention methods and strategies; create components of the intervention and conduct pilot tests; create an implementation plan; and create an evaluation plan.

Results

We developed the blended intervention Foxfit that consists of an app with a PA monitor for children (aged 8 to 12 years) with asthma and a web-based dashboard for their health care provider. The intervention focuses on PA in everyday life to improve social participation. Foxfit contains components based on behavior change principles and gamification, including goal setting, rewards, action planning, monitoring, shaping knowledge, a gamified story, personal coaching and feedback, and a tailored approach. An evaluation plan was created to assess the intervention’s usability and feasibility for both children and health care providers.

Conclusions

The IM framework was very useful for systematically developing a technology-supported intervention and for describing the translational process from scientific evidence, the needs and wishes of future users, and behavior change principles into this intervention. This has led to the technology-supported intervention Foxfit that facilitates health care providers in promoting PA in children with asthma. The structured description of the development process and functional components shows the way behavior change techniques are incorporated in the intervention.

Trial Registration

International Clinical Trial Registry Platform NTR6658; https://tinyurl.com/3rxejksf

Recommendations for Physical Activity in Asthma: A Work Group Report of the AAAAI Sports, Exercise, and Fitness Committee

Regular physical activity not only improves general health but also can positively impact asthma outcomes, such as control and quality of life. Despite this, many asthma patients do not engage in regular physical activity because they mistakenly believe that they should restrict exercise participation. Health care providers have an opportunity to influence the physical activity levels of their patients during regular office visits. Nonetheless, health care providers often overlook physical activity counseling as an adjunct to pharmacological therapy in asthma patients, and in particular, overlook physical activity counseling. Some providers who acknowledge the benefits of physical activity report being unaware how to approach a conversation with patients about this topic. To address these issues, members of the Sports, Exercise, and Fitness Committee of the American Academy of Allergy, Asthma, and Immunology (AAAAI) performed a focused literature search to identify and evaluate the effects of physical activity in patients with asthma. The purpose of this report is to summarize the evidence for physical activity's impact on asthma patients' disease control, pulmonary function, and overall well-being. Several subpopulations of patients with asthma, including children, adolescents, and older adults, are considered individually. In addition, this report offers practical recommendations for clinicians, including how to identify and overcome barriers to counseling, and methods to incorporate physical activity counseling into asthma treatment practice.

Management of Intermittent and Persistent Asthma in Adolescent and High School Athletes

Asthma is the most common chronic condition during childhood and adolescence, affecting an estimated 8% of children and youngsters below 18 years in the United States and the United Kingdom. In adolescent athletes, asthma-like symptoms may represent a common consequence of regular sport practice. Asthma in young athletes poses several challenges, including the ambiguity of definitions and diagnosis of asthma resulting from exercise-induced symptoms, the best pharmacological treatments, and the nonpharmacological options for the management of disease and the challenges inherent to this age group. At a time when the regular practice of sports is increasingly being recommended for a healthy living, the support network around the young athletes is crucial to reduce the impact of asthma on their physical and emotional well-being. In this review, we examine the main issues around the definitions and clinical differentiations of asthma in young sport athletes. We discuss best practice approaches to improve the adherence to the clinical management, including nonpharmacological strategies directed at the family and trainers of athlete adolescents.

The Association between Vigorous Physical Activity and Stress in Adolescents with Asthma

Asthma is a very common condition that affects 5-10% of the global population, and its prevalence is increasing. Vigorous physical activity (PA) is effective in improving cardiorespiratory fitness and managing stress. This study aimed to investigate the association between vigorous PA and stress among Korean adolescents with asthma using large-scale survey data. The questionnaire data of 57,303 adolescents were analyzed using raw data from the 2019 Korea Youth Risk Behavior Web-Based Survey. We performed logistic regression analysis to calculate the stress odds ratios (ORs) and 95% confidence intervals (CIs) for asthma and non-asthma groups using models 1 and 2. We also performed logistic regression analysis to calculate the stress OR for the asthma group with vigorous PA and non-vigorous PA using models 1, 2, and 3. Model 1 was adjusted for age, sex, obesity, smoking, and alcohol status; model 2 was further adjusted for household income, academic achievement, and comorbidities. Model 3 was further adjusted for moderate activity and resistance exercise. The OR of stress was 20% higher in the asthma group than in the non-asthma group (p < 0.05). In the fully adjusted models, the OR for the non-asthma group with vigorous PA versus non-vigorous PA was 0.89 (95% CI: 0.84-0.94). However, the OR for the asthma group with vigorous PA versus non-vigorous PA was 0.70 (95% CI: 0.57-0.86), indicating that adolescents who engage in vigorous PA had lower stress in the asthma group (p < 0.05). This study demonstrated that adolescents with asthma had higher stress levels than those without asthma; however, vigorous PA was associated with lower stress. These effects were more pronounced in adolescents with asthma.

Effects of continuous aerobic exercise on lung function and quality of life with asthma: a systematic review and meta-analysis

Background

Despite the obvious benefits of aerobic exercise for asthmatic patients, controversies persist. The current study evaluated the effectiveness of continuous aerobic exercise on lung function and quality of life of asthmatic patients.

Methods

We searched PubMed, EMBASE, and the Cochrane Central Register of Controlled Trials databases up to May 2019 and included randomized controlled trials (RCTs) of asthmatic patients intervened with whole body continuous aerobic exercise (moderate intensity, at least 20 minutes and two times a week, over a minimum period of four weeks), in which the endpoint measures were lung function and asthma-related quality of life. A fixed-effects model (I²≤50%) or random-effects model (I²>50%) was applied to calculate the pooled effects according to the I²-and Chi-squared (χ²) test, funnel plots were quantified to present publication bias, and a P value <0.05 was statistically significant.

Results

Eventually, 22 trials conformed to the selection criteria. In the aerobic exercise group, the forced expiratory volume improved in one second (FEV1) (I²=10.2%, WMD: 0.12, P=0.011), peak expiratory flow (PEF) (I²=87.3%, WMD: 0.66, P=0.002), forced vital capacity (FVC) (I²=0.0%, WMD: 0.18, P<0.001), FVC/predict (I²=3.9%, WMD: 4.3, P=0.014), forced expiratory flow between 25% and 75% of vital capacity (FEF_25-75%) (I²=0.0%, WMD: 9.6, P=0.005), Asthma Quality of Life Questionnaire (AQLQ) (I²=0.0%, WMD: 0.20, P=0.002), and Pediatric Asthma Quality of life Questionnaire (PAQLQ) (I²=72.1%, WMD: 0.81, P<0.001), respectively, while no statistical significance existed in FEV1%predict (I²=36.0%, WMD: 0.68, P=0.312) and FEV1/FVC ratio (I²=0.0%, WMD: 0.27, P=0.443) compared with the control group. When the exercise mode was taken into account, we observed significant improvement in FEV1, PEF, and FVC in the swimming (P<0.05) or indoor treadmill (P<0.05) training group.

Conclusions

Our meta-analysis proved that regular continuous aerobic exercise benefits asthma patients on FEV1, PEF, FVC, FVC%pred, FEF_25-75%, and quality of life, and was well tolerated, while there were no improvements in FEV1%pred and FEV1/FVC%. As such, swimming and treadmill training may be appropriate options.

EFFECT OF PHYSICAL TRAINING ON EXERCISE-INDUCED BRONCHOSPASM IN YOUNG ASTHMATICS

ABSTRACT Introduction: Asthma is the most common chronic disease in childhood and its prevalence has increased in recent years. Although regular physical activity (PA) is considered to be beneficial for the health of asthmatics, especially children and adolescents, it can also be one of the elements that triggers asthma. This is known as exercise-induced bronchospasm (EIB), and is considered one of the factors that limits asthmatics’ participation in PA. Objective: This study aims to review the effects of physical conditioning on EIB in asthmatic children and adolescents. Methods: A systematic review was carried out on the Pubmed, Bireme and Web of Science databases, considering publications from 1998 to April 2019. Results: Eight articles were retrieved; five of the articles presented no significant difference in EIB parameters after physical training, and three demonstrated significant benefits in EIB. Conclusion: There is insufficient evidence that physical training helps reduce the frequency and severity of EIB in young asthmatics. There are still few studies that seek to show the effect of a physical training program on the improvement of EIB in children and adolescents. It is suggested that further randomized clinical trials be conducted, to investigate the effects of physical training on EIB parameters in children and adolescents. Level of Evidence II; Systematic review.

Exercise and Asthma

Asthma is a chronic lower respiratory disease that is very common worldwide, and its incidence is increasing year by year. Since the 1970s, asthma has become widespread, with approximately 300 million people affected worldwide and about 250,000 people have lost their lives. Asthma seriously affects people's physical and mental health, resulting in reduced learning efficiency, limited physical activities, and decreased quality of life. Therefore, raising awareness of the risk of asthma and how to effectively treat asthma have become important targets for the prevention and management of asthma in recent years. For patients with asthma, exercise training is a widely accepted adjunct to drug-based and non-pharmacological treatment. It has been recommended abroad that exercise prescriptions are an important part of asthma management.

Promoting Factors for Physical Activity in Children with Asthma Explored through Concept Mapping

For children with asthma, physical activity (PA) can decrease the impact of their asthma. Thus far, effective PA promoting interventions for this group are lacking. To develop an intervention, the current study aimed to identify perspectives on physical activity of children with asthma, their parents, and healthcare providers. Children with asthma between 8 and 12 years old (n = 25), their parents (n = 17), and healthcare providers (n = 21) participated in a concept mapping study. Participants generated ideas that would help children with asthma to become more physically active. They sorted all ideas and rated their importance on influencing PA. Clusters were created with multidimensional scaling and cluster analysis. The researchers labelled the clusters as either environmental or personal factors using the Physical Activity for people with a Disability model. In total, 26 unique clusters were generated, of which 17 were labelled as environmental factors and 9 as personal factors. Important factors that promote physical activity in children with asthma according to all participating groups are asthma control, stimulating environments and relatives, and adapted facilities suiting the child’s needs. These factors, supported by the future users, enable developing an intervention that helps healthcare providers to promote PA in children with asthma.

PSYCHOSOCIAL CHARACTERISTICS IN CHILDREN WITH ASTHMA REGARDING PHYSICAL ACTIVITY

ABSTRACT Introduction Children who are more active enjoy sports, have confidence in their ability to engage in physical activity, feel competent and perceive fewer barriers to physical activity. Objective Psychosocially characterize the asthmatic child’s relationship with enjoyable physical activity, physical self-concept, health and perceived quality of life. Method Eighty asthmatic children (age = 11.33 ± 1.10 years, body mass index [BMI] = 20.52 ± 3.83 kg/m2) and 80 healthy children (age = 11.18 ± 1.00 years, BMI = 20.81 ± 4.24 kg/m2) participated in the study. The Physical Activity Enjoyment Scale (PACES), Physical Activity Questionnaire for Children (PAQ-C), the Physical Self-concept Questionnaire (CAF) and the Pediatric Asthma Quality of Life Questionnaire (PAQLQ) were used. Results In the PACES questionnaire, healthy children had a better level of general physical activity while in the CAF questionnaire, significant differences were found in ability, physical fitness and general self-concept, which were higher in healthy children. There is a significant correlation between the PAQ-C and ability, general physical self-concept, PACES and total PAQLQ in asthmatic children. Conclusion Asthmatic children had lower levels of physical activity, physical self-concept and enjoyment in physical activity than healthy children. Level of evidence II; Retrospective study.

Do Urban Minority Parents and Children Agree on Asthma Symptoms with Exercise, Worries, and Confidence in Disease Management?

OBJECTIVE

Providers commonly rely on parent reports of a child's asthma symptoms; however, children as young as 7 years can report on their own health. Our study compared parent and child reports of asthma symptoms with exercise, worries about developing an asthma attack, and confidence in disease management.

METHODS

We recruited children ages 7 to 10 years with asthma from 4 Bronx, NY, schools, as well as their parents. The parents and children completed interview surveys with parallel questions regarding perceived asthma symptoms, asthma-related worries, and confidence in disease management. We used McNemar tests for paired data to compare parent and child responses.

RESULTS

We analyzed data for 105 parent-child pairs. Mean child age was 8.5 years (standard deviation, 0.99); 53% were male, and 82% were Hispanic. Children were more likely than their parents to report ever having an exercise-induced asthma attack (85% vs 48%; P < .001) and that they "worry a lot" about developing an asthma attack during exercise (63% vs 45%; P = .01). Children felt more confident about using an inhaler correctly (76% of the children were "very sure" vs 60% of the parents; P = .009) and were more likely to report having an inhaler available in case of an attack (38% of the children were "very sure" vs 20% of the parents; P = .003).

CONCLUSIONS

In this school-based sample of urban children with asthma, we found disagreement between parent and child reports of symptoms with exercise, worry about developing an attack, and confidence in medication use. These findings suggest that including child reports during history taking could help providers identify children in need of enhanced asthma management.

Asthma management in school: parents' and school personnel perspectives

Objective: Effective asthma management at school can help students with asthma stay healthy, learn better and participate fully during their school day. This study sought to understand school-based asthma care from the perspective of parents and school personnel to improve asthma care at school. Methods: A cross-sectional study was conducted in Hartford, CT. School personnel from 59 schools and 322 parents/guardians were invited to participate. Four cross-sectional surveys using Likert-type scales assessed parental and school personnel satisfaction, confidence in managing asthma, policy awareness, management of asthma during physical activity, and perceived gaps surrounding school-based asthma care. Results: 263/322 (82%) eligible parents of children with asthma (mean age 8.5 ± 4.3, 56% Hispanic, 30% African American) completed surveys. Thirty six school nurses (62%), 131 teachers (8%), 14 coaches (14%), and 17 school principals (29%) participated. 90% of parents were satisfied with asthma management in school. School nurses were more aware of asthma policies than teachers (74% vs. 24%, p < 0.001). 34% of school nurses, 30% of teachers and 36% of coaches were unaware of asthma-related absences. 14% of physical education teachers/coaches reported no asthma training. Conclusion: In this convenience sample of parents and school personnel, parents reported overall satisfaction regarding the asthma care their children receive at school, yet a number of gaps pertaining to school-based asthma care were identified. Increased asthma training and enhanced communication among school personnel is needed to address these gaps. National guidelines and resources are readily available to improve asthma care at school.

Physical activity for children with chronic disease; a narrative review and practical applications

BACKGROUND

Physical activity (PA) is associated with a diverse range of health benefits. International guidelines suggest that children should be participating in a minimum of 60 min of moderate to vigorous intensity PA per day to achieve these benefits. However, current guidelines are intended for healthy children, and thus may not be applicable to children with a chronic disease. Specifically, the dose of PA and disease specific exercise considerations are not included in these guidelines, leaving such children with few, if any, evidence-based informed suggestions pertaining to PA. Thus, the purpose of this narrative review was to consider current literature in the area of exercise as medicine and provide practical applications for exercise in five prevalent pediatric chronic diseases: respiratory, congenital heart, metabolic, systemic inflammatory/autoimmune, and cancer.

METHODS

For each disease, we present the pathophysiology of exercise intolerance, summarize the pediatric exercise intervention research, and provide PA suggestions.

RESULTS

Overall, exercise intolerance is prevalent in pediatric chronic disease. PA is important and safe for most children with a chronic disease, however exercise prescription should involve the entire health care team to create an individualized program.

CONCLUSIONS

Future research, including a systematic review to create evidence-based guidelines, is needed to better understand the safety and efficacy of exercise among children with chronic disease.

Effects of exercise training on physical and psychosocial health in children with chronic respiratory disease: a systematic review and meta-analysis

INTRODUCTION

Chronic disease in children is increasing, including the prevalence of chronic respiratory diseases such as asthma, cystic fibrosis (CF), bronchiectasis and bronchopulmonary dysplasia (BPD). The aim of this systematic review and meta-analysis was to evaluate the effects of exercise training on health outcomes in children with chronic respiratory disease.

METHOD

Five databases were searched for randomised controlled trials investigating the effects of exercise training on children with chronic respiratory disease. Following the PRISMA guidelines, eligible studies were identified and data were extracted. A meta-analysis was conducted for the outcomes cardiovascular fitness, lung function and quality of life (QoL).

RESULTS

The initial search returned 3688 papers. Twenty-seven (17 in children with asthma, 10 in children with CF) were included in the systematic review and 24 of these were included in the meta-analysis. No studies were identified in children with bronchiectasis or BPD. Included papers had a total of 1009 participants aged 8-20 years. In addition to cardiovascular fitness, lung function and QoL, studies also assessed pulmonary function, respiratory muscle strength, muscular strength and inflammation. Meta-analysis showed a large significant effect size in favour of exercise for cardiovascular fitness (peak VO2) (standard mean difference (SMD)=1.16, 95%  CI 0.61 to 1.70) and QoL (SMD=1.27, 95% CI 0.72 to 1.82) as well as a small, non-significant effect size for lung function (FEV1) (SMD=0.02, 95% CI -0.38 to 0.42).

CONCLUSION

Exercise training significantly improves cardiovascular fitness and QoL in children with asthma and CF. Further research is needed, particularly in children with bronchiectasis and BPD.

Parental Perspectives of Barriers to Physical Activity in Urban Schoolchildren With Asthma

OBJECTIVE

Physical activity (PA) levels are low in today's youth and may even be lower in those with asthma. Barriers to PA have not been well studied in inner-city minority children with asthma. We conducted a qualitative study to characterize parental perceptions of barriers to PA and ways to improve PA levels in children with asthma.

METHODS

We used the socioecologic model to inform development of our interview guide. Questions fell into 2 socioecologic model domains: interpersonal (parent, family) barriers and community (neighborhood, school) barriers. Qualitative semistructured interviews were conducted with 23 parents (21 mothers, 2 fathers) of inner-city children with asthma (aged 8-10 years) from 10 Bronx, New York, elementary schools. Sampling continued until thematic saturation was reached. Interviews were recorded, transcribed, and independently coded for common themes. Emerging themes were discussed and agreed on by investigators.

RESULTS

Three themes surrounding interpersonal barriers to PA emerged: 1) parental fear of exercise-induced asthma due to lack of child symptom awareness, 2) nonadherence and refusal to take medications, and 3) challenges with asthma management. Four themes around community barriers to PA emerged: 1) lack of trust in school management of asthma, 2) lack of school PA facilities, 3) unsafe neighborhoods, and 4) financial burden of PA.

CONCLUSIONS

A complex, multilevel set of barriers to PA exist in children with asthma. Addressing these barriers by involving stakeholders at the family, school, and community levels may improve PA levels in children with asthma.

Exploring the Association Between Self-Reported Asthma Impact and Fitbit-Derived Sleep Quality and Physical Activity Measures in Adolescents

BACKGROUND

Smart wearables such as the Fitbit wristband provide the opportunity to monitor patients more comprehensively, to track patients in a fashion that more closely follows the contours of their lives, and to derive a more complete dataset that enables precision medicine. However, the utility and efficacy of using wearable devices to monitor adolescent patients' asthma outcomes have not been established.

OBJECTIVE

The objective of this study was to explore the association between self‑reported sleep data, Fitbit sleep and physical activity data, and pediatric asthma impact (PAI).

METHODS

We conducted an 8‑week pilot study with 22 adolescent asthma patients to collect: (1) weekly or biweekly patient‑reported data using the Patient-Reported Outcomes Measurement Information System (PROMIS) measures of PAI, sleep disturbance (SD), and sleep‑related impairment (SRI) and (2) real-time Fitbit (ie, Fitbit Charge HR) data on physical activity (F-AM) and sleep quality (F‑SQ). To explore the relationship among the self-reported and Fitbit measures, we computed weekly Pearson correlations among these variables of interest.

RESULTS

We have shown that the Fitbit-derived sleep quality F-SQ measure has a moderate correlation with the PROMIS SD score (average r=-.31, P=.01) and a weak but significant correlation with the PROMIS PAI score (average r=-.18, P=.02). The Fitbit physical activity measure has a negligible correlation with PAI (average r=.04, P=.62).

CONCLUSIONS

Our findings support the potential of using wrist-worn devices to continuously monitor two important factors-physical activity and sleep-associated with patients' asthma outcomes and to develop a personalized asthma management platform.

Factors associated with in-school physical activity among urban children with asthma

OBJECTIVE

A cross-sectional study was conducted to determine if in-school physical activity (PA) varied by age, gender, weight and asthma status, participation in physical education (PE), outdoor recess, and other in-school PA among urban schoolchildren with asthma.

METHODS

PA was measured by tri-axial accelerometers. Height and mass were measured and overweight defined as BMI ≥85th percentile. Asthma impairment and risk were assessed as per national guidelines, and asthma status variable with three categories (mild, moderate, and severe) was created. Multivariable generalized linear mixed models adjusting for clustering due to school and student were fitted to identify variables predictive of PA.

RESULTS

108 children with asthma participated. Children spent 374 minutes in school, of which 253 minutes were sedentary, 105 minutes in light PA, and 16 minutes in moderate-to-vigorous PA (MVPA). Only 3 participants reached the recommended ≥30 minutes/day of MVPA. Multivariable analysis revealed age, gender, participation in PE class, outdoor recess, and other in-school PA as independent predictors of PA. BMI and asthma status were not associated with PA.

CONCLUSIONS

Children with asthma were mostly sedentary at school. Older children and girls were particularly at risk for inactivity. PE, recess, and other in-school PA participation are modifiable factors that should be targeted in school-based interventions aimed at increasing PA in this population.

Population-based study shows that teenage girls with asthma had impaired health-related quality of life

AIM

This study examined the health-related quality of life (HRQoL) of teenagers with and without asthma, including the impact of their sex, allergic conditions, smoking, living conditions and physical activity.

METHODS

The Obstructive Lung Disease in Northern Sweden (OLIN) studies recruited a cohort of schoolchildren in 2006. The parents of all children aged seven to eight years in three municipalities were invited to complete a questionnaire and 2585 (96%) participated. The cohort was followed up at the ages of 11-12 years and 14-15 years with high participation rates. At 14-15 years, the HRQoL questionnaire KIDSCREEN-10 and Asthma Control Test were added.

RESULTS

Girls with current asthma at 14-15 years had a lower mean HRQoL score than girls without asthma (46.4 versus 49.3, p < 0.001), but this was not seen among boys (53.8 versus 52.8, p = 0.373). Poor HRQoL was related to current asthma, uncontrolled asthma and teenage onset of asthma. It was also related to eczema, living in a single-parent household, maternal smoking, daily smoking and inversely related to physical activity.

CONCLUSION

Teenage girls with asthma had lower HRQoL than girls without asthma. Possible interventions to improve HRQoL among teenagers with asthma were identified as follows: increasing asthma control, preventing smoking and promoting physical activity.

Exercise-Induced Bronchospasm and Allergy

Sport is an essential part of childhood, with precious and acknowledged positive health effects but the impact of exercise-induced bronchoconstriction (EIB) significantly reduces participation in physical activity. It is important to recognize EIB, differentiating EIB with or without asthma if the transient narrowing of the airways after exercise is associated with asthmatic symptoms or not, in the way to select the most appropriate treatment among the many treatment options available today. Therapy is prescribed based on symptoms severity but diagnosis of EIB is established by changes in lung function provoked by exercise evaluating by direct and indirect tests. Sometimes, in younger children it is difficult to obtain the registration of difference between the preexercise forced expiratory volume in the first second (FEV1) value and the lowest FEV1 value recorded within 30 min after exercise, defined as the gold standard, but interrupter resistance, in association with spirometry, has been showed to be a valid alternative in preschool age. Atopy is the main risk factor, as demonstrated by epidemiologic data showing that among the estimated pediatric population with EIB up to 40% of them have allergic rhinitis and 30% of these patients may develop adult asthma, according with atopic march. Adopting the right treatment and prevention, selecting sports with no marked hyperventilation and excessive cooling of the airways, children with EIB can be able to take part in physical activity like all others.

Effects of an Intensive Lifestyle Intervention to Treat Overweight/Obese Children and Adolescents

Objective

The purpose of the present study is to examine the effects of a multidisciplinary lifestyle intervention to treat overweight/obese children and adolescents. The main outcome was cardiometabolic risk based on the waist-to-height ratio (WHTR) measurement. Secondary outcomes were (1) changes in body composition; (2) adherence to a Mediterranean diet; and (3) physical performance.

Method

The study involved 74 overweight/obese children or adolescents. The intervention was multidisciplinary including nutrition, exercise, and psychological aspects based on a family-based approach; it was delivered for six months for children and three months for adolescents. Before and after the intervention, several anthropometric measures (height, body weight, body mass index or BMI, waist circumference, and body composition), cardiometabolic risk index (waist-to-height ratio or WHTR), and nutrition habits of the participants and their families were evaluated. In addition, a set of functional motor fitness tests was performed to evaluate physical performance measures.

Results

After the intervention both children and adolescents showed a significant reduction in body weight, BMI, waist circumference, fat mass, and WHTR index and an improvement of fat-free mass, adherence to the Mediterranean diet, and physical fitness performance.

Conclusion

A family-based multidisciplinary approach is effective in the short term in ameliorating the health status, the nutrition habits, and physical performance in children and adolescents.

Sex differences in asthma in swimmers and tennis players

BACKGROUND

Elite athletes, independent of sport, have increased risk of developing asthma, but little is known about sex difference among adolescent athletes.

OBJECTIVE

To investigate and compare sex-related differences according to symptoms and treatment of asthma, allergy, and health among elite athletes and a reference group.

METHODS

Adolescent elite swimmers (n = 101), tennis players (n = 86), and a reference group (n = 1,628) responded to a questionnaire about respiratory symptoms, allergy, health behavior, psychosomatic symptoms, self- esteem, and well-being. The athletes performed a mannitol provocation and a sport-specific exercise provocation. Atopy was assessed by skin prick tests, and fractional exhaled nitric oxide was measured.

RESULTS

The females reported more asthma symptoms than the males in both the reference group (29.1% vs 22.3%) and the athlete group (56.4% vs 40.2%). However, no significant differences were found in physician-diagnosed asthma or treatment with inhaled corticosteroids. More female athletes had a positive mannitol provocation result (48.7% vs 35.8% in male athletes), and more female swimmers had a positive exercise provocation result (15.1% vs 7.7% in male swimmers). The females in all groups had more psychosomatic symptoms compared with the respective males, and the males in the reference group reported higher self-esteem and felt more well-being compared with the reference group females.

CONCLUSION

Overall, we found a higher prevalence of asthma symptoms in the females. However, the frequency of physician-diagnosed asthma and the prescription of inhaled corticosteroids were the same in both sexes. This finding demonstrates an insufficient diagnosis of asthma in females.

Asthma in adolescence: Is there any news?

Asthma is a chronic disease that has a significant impact quality of life, which is particularly important in adolescence. We will discuss aspects of epidemiology, the clinical spectrum, diagnostics, and management of asthma in adolescence. In particular, we will highlight the psychological implications of having asthma during this developmental period. Data published in the past 10 years, since we last reviewed the subject, will be the main focus of this paper. The care of the teenager with asthma should take into account the rapid physical, emotional, cognitive, and social changes that occur during normal adolescence. The diagnostic process may be more difficult since teenagers tend to deny their illness. Thus, both under-diagnosis and under-assessment of asthma severity may lead to under-treatment and potentially avoidable morbidity and even mortality. Conversely, teenagers may be often misdiagnosed as having asthma or their asthma severity may be overestimated leading to inappropriate and sometimes excessive treatment. Educational programs, environmental avoidance measures, proper use of medications along with a skilled approach, and a caring attitude of health providers are all very important for successful management. Pediatr Pulmonol. 2017;52:129-138. © 2016 Wiley Periodicals, Inc.

A theory-informed approach to developing visually mediated interventions to change behaviour using an asthma and physical activity intervention exemplar

BACKGROUND

Visualisation techniques are used in a range of healthcare interventions. However, these frequently lack a coherent rationale or clear theoretical basis. This lack of definition and explicit targeting of the underlying mechanisms may impede the success of and evaluation of the intervention. We describe the theoretical development, deployment, and pilot evaluation, of a complex visually mediated behavioural intervention. The exemplar intervention focused on increasing physical activity among young people with asthma. We employed an explicit five-stage development model, which was actively supported by a consultative user group. The developmental stages involved establishing the theoretical basis, establishing a narrative structure, visual rendering, checking interpretation, and pilot testing. We conducted in-depth interviews and focus groups during early development and checking, followed by an online experiment for pilot testing. A total of 91 individuals, including young people with asthma, parents, teachers, and health professionals, were involved in development and testing.

RESULTS

Our final intervention consisted of two components: (1) an interactive 3D computer animation to create intentions and (2) an action plan and volitional help sheet to promote the translation of intentions to behaviour. Theory was mediated throughout by visual and audio forms. The intervention was regarded as highly acceptable, engaging, and meaningful by all stakeholders. The perceived impact on asthma understanding and intentions was reported positively, with most individuals saying that the 3D computer animation had either clarified a range of issues or made them more real. Our five-stage model underpinned by extensive consultation worked well and is presented as a framework to support explicit decision-making for others developing theory informed visually mediated interventions.

CONCLUSIONS

We have demonstrated the ability to develop theory-based visually mediated behavioural interventions. However, attention needs to be paid to the potential ambiguity associated with images and thus the concept of visual literacy among patients. Our revised model may be helpful as a guide to aid development, acceptability, and ultimately effectiveness.

Childhood asthma and physical activity: a systematic review with meta-analysis and Graphic Appraisal Tool for Epidemiology assessment

BACKGROUND

Childhood asthma is a global problem affecting the respiratory health of children. Physical activity (PA) plays a role in the relationship between asthma and respiratory health. We hypothesized that a low level of PA would be associated with asthma in children and adolescents. The objectives of our study were to (1) summarize the evidence available on associations between PA and asthma prevalence in children and adolescents and (2) assess the role of PA in new-onset or incident asthma among children and adolescents.

METHODS

We searched Medline, the Cochrane Library, and Embase and extracted data from original articles that met the inclusion criteria. Summary odds ratios (ORs) and confidence intervals (CIs) were used to express the results of the meta-analysis (forest plot). We explored heterogeneity using funnel plots and the Graphic Appraisal Tool for Epidemiology (GATE).

RESULTS

We retrieved 1,571 titles and selected 11 articles describing three cohort and eight cross-sectional studies for inclusion. A meta-analysis of the cohort studies revealed a risk of new-onset asthma in children with low PA (OR [95 % CI] 1.32 [0.95; 1.84] [random effects] and 1.35 [1.13; 1.62] [fixed effects]). Three cross-sectional studies identified significant positive associations between childhood asthma or asthma symptoms and low PA.

CONCLUSIONS

Children and adolescents with low PA levels had an increased risk of new-onset asthma, and some had a higher risk of current asthma/or wheezing; however, there was some heterogeneity among the studies. This review reveals a critical need for future longitudinal assessments of low PA, its mechanisms, and its implications for incident asthma in children. The systematic review was prospectively registered at PROSPERO (registration number: CRD42014013761; available at: http://www.crd.york.ac.uk/PROSPERO [accessed: 24 March 2016]).

Influence of polymorphisms of the beta-2 adrenergic receptor on the presence of exercise-induced bronchospasm in adolescents

Objective:

To determine the influence of polymorphisms of the beta-2 adrenergic receptor (ADRB2) in triggering exercise-induced bronchospasm (EIB) in adolescents.

Methods:

The subjects were divided into two groups: present EIB (EIB+) (n=45) and absent EIB (EIB−) (n=115). The bronchial provocation test with exercise was performed with a protocol that consisted of walking/running for at least eight minutes at high intensity, i.e., >85% of maximum heart rate, considering EIB+ as a 10% decrease in forced expiratory volume in one second (FEV₁). The genotyping of the ADRB2 gene was performed by the Taqman method, using the Step One Plus system. Independent t-test, Mann–Whitney and Chi-square tests, as well as Spearman's correlation coefficient were used for the statistical analysis.

Results:

Age, body weight, height, FEV₁, FVC and FEV₁/FVC ratio were lower in the EIB+ group when compared to EIB− (p<0.05). There were no significant differences in the proportion of the allele at position 27 and Arg16Gly and Gln27Glu genotypes between the EIB+ and EIB− groups (p=0.26; p=0.97 and p=0.43, respectively). However, there was a trend toward statistical significance regarding the greater proportion of the Gly16 allele for the EIB+ when compared to the EIB− group (p=0.08).

Conclusions:

The presence of polymorphisms associated with the Glu27 allele and Arg16Gly and Gln27Glu genotypes had no influence on EIB. However, the statistical trend toward greater frequency of the Gly16 allele in individuals with EIB+ can be considered evidence of the influence of polymorphisms of the ADBR2 gene on EIB in adolescents.

Effect of a physical activity program on sport enjoyment, physical activity participation, physical self-concept and quality of life in children with asthma

Abstract This study aims to analyse the effects of indoor physical training program on the enjoyment and the willingness to participate in sports activities, physical self-concept and the quality of life in children with asthma. Participants were randomized in an experimental group (EG) (n=58, age=11.55±1.01 years old) and, a control group (CG) (n = 47, age=11.51±1.42 years old). An indoor training program was executed for 12-week, with each week containing three sessions of 60 minutes. Enjoyment in physical activity questionnaire, participation in physical activities, physical self-concept questionnaire, 6 minute walking test, and paediatric asthma quality of life questionnaire were employed. After the intervention, EG showed a significant reduction in the body mass index as well as a significant improvement in physical fitness test and the score obtained in questionnaires compared to the CG. A12-week indoor training program targeted towards asthmatic children improved the sport enjoyment, physical activity participation, physical self-concept, and quality of life.

[Influence of polymorphisms of the beta-2 adrenergic receptor on the presence of exercise-induced bronchospasm in adolescents]

OBJECTIVE

To determine the influence of polymorphisms of the beta-2 adrenergic receptor (ADRB2) in triggering exercise-induced bronchospasm (EIB) in adolescents.

METHODS

The subjects were divided into two groups: present EIB (EIB+) (n=45) and absent EIB (EIB-) (n=115). The bronchial provocation test with exercise was performed with a protocol that consisted of walking/running for at least eight minutes at high intensity, i.e., >85% of maximum heart rate, considering EIB+ as a 10% decrease in forced expiratory volume in one second (FEV1). The genotyping of the ADRB2 gene was performed by the Taqman method, using the Step One Plus system. Independent t-test, Mann-Whitney and Chi-square tests, as well as Spearman's correlation coefficient were used for the statistical analysis.

RESULTS

Age, body weight, height, FEV1, FVC and FEV1/FVC ratio were lower in the EIB+ group when compared to EIB- (p<0.05). There were no significant differences in the proportion of the allele at position 27 and Arg16Gly and Gln27Glu genotypes between the EIB+ and EIB- groups (p=0.26; p=0.97 and p=0.43, respectively). However, there was a trend towards statistical significance regarding the greater proportion of the Gly16 allele for the EIB+ when compared to the EIB- group (p=0.08).

CONCLUSIONS

The presence of polymorphisms associated with the Glu27 allele and Arg16Gly and Gln27Glu genotypes had no influence on EIB. However, the statistical trend towards greater frequency of the Gly16 allele in individuals with EIB+ can be considered evidence of the influence of polymorphisms of the ADBR2 gene on EIB in adolescents.

Relationships among obesity, physical activity and sedentary behavior in young adolescents with and without lifetime asthma

OBJECTIVE

To examine the inter-relationships among body mass index (BMI), physical activity, sedentary behavior and gender in urban, low-income, primarily African American young adolescents with or without lifetime asthma.

METHODS

Data were collected in 2002-2004 from 626 12-year old adolescents who were children of women who participated in the New Mother's Study in Memphis, TN (1990-1991). Adolescents with and without asthma were compared on BMI, physical activity and sedentary behavior. Multiple linear regression models were used to examine the association of asthma, gender and BMI with physical activity and sedentary behavior.

RESULTS

Complete data were available for 545 adolescents. Eleven percent of adolescents had lifetime asthma. Asthma and gender were associated with high-intensity physical activity (p < 0.001). Adolescents with asthma participated in less physical activity and girls participated less than boys. Gender was associated with sedentary behavior (p < 0.001): boys used personal computer (pc)/video after school more than girls. Girls with asthma had a higher BMI than girls without asthma (p = 0.027). Boys with asthma were less physically active than boys without asthma (p < 0.05).

CONCLUSIONS

Adolescents with asthma are less physically active than those without asthma and girls are less active than boys. Clinicians who provide care for adolescents with asthma are encouraged to assess physical activity/sedentary behavior and provide guidance that promotes active lifestyles. A longitudinal study is needed to shed light on the unique contribution of asthma separated from the effects of overweight/obesity on physical activity and sedentary behaviors.

Gender differences in objectively assessed physical activity in asthmatic and non-asthmatic children

OBJECTIVE

To compare objectively assessed physical activity levels, between asthmatic children and non-asthmatic controls.

METHODS

From a random community sample of 794 children aged 8-9 years, in a case-control design, 104 children with ever doctor's diagnosis of asthma and 99 non-asthmatic controls were recruited and had assessment of physical activity with biaxial accelerometers for 7 days.

RESULTS

Children with active (also reporting at least one episode of wheezing in the last 12 months) and inactive (no wheezing in past 12 months) asthma appeared to have similar physical activity and sedentary activity levels compared to non-asthmatic children. However, girls with active asthma had significantly lower moderate-to-vigorous physical activity (MVPA) levels than their peers with adjusted geometric mean ratio of 0.59 (95% CI: 0.369, 0.929, P-value = 0.024). No difference in physical and sedentary activity levels was observed between asthmatic and non-asthmatic boys. The difference between genders in the comparison of MVPA levels in asthmatics and controls was statistically significant (P-value of likelihood ratio test [LRT] for effect modification by gender = 0.034).

CONCLUSIONS

Unlike boys, girls with active asthma appear to be less active than their healthy peers, and this gender difference might explain the inconsistent evidence from previous reports on physical activity levels in asthmatic children. Further studies are needed to confirm the gender interaction in the childhood asthma-physical activity relation and the implications on current guidelines for physical exercise prescriptions in asthmatic children.

Effects of altered airway function on exercise ventilation in asthmatic adults

PURPOSE

Variable airway function is a central feature of the asthmatic condition. Thus, habitually active asthmatics are certain to exercise under conditions of variable airway (dys)function. The purpose of this study was to determine the effects of variable preexercise airway function on ventilation during whole-body exercise in asthmatic adults.

METHODS

Eight mild asthmatic (age = 26 yr; V˙O2peak = 49 mL·kg·min) and nine nonasthmatic (age = 30 yr; V˙O2peak = 46 mL·kg·min) adults performed constant workrate cycling exercise to exhaustion after four separate interventions: 1) a control trial (CON); 2) inhalation of fast-acting β2-agonist (BD); 3) eucapnic voluntary hyperpnea challenge (BC); and 4) sham to the hyperpnea (SHAM). Pulmonary function was assessed at baseline and after each intervention. Exercise ventilation and operating lung volumes were compared among the four exercise trials in both control and asthmatic subjects.

RESULTS

Baseline pulmonary function was significantly lower in asthmatic subjects compared with control subjects. In asthmatic subjects, postintervention (i.e., preexercise) forced expiratory volume 1.0 s was significantly different among the four exercise trials (CON = 3.5 ± 0.4, BD = 4.1 ± 0.4, SHAM = 3.6 ± 0.3, BC = 2.8 ± 0.3 L, P < 0.05), whereas it was not different in control subjects. There were no differences in exercise ventilation or operating lung volumes during exercise among the four trials either within asthmatic subjects or between control and asthmatic subjects.

CONCLUSIONS

These findings suggest that the state of airway function-whether bronchodilated or bronchoconstricted-before exercise in the mild asthmatic does not affect the exercise ventilatory response. Thus, ventilatory system function in the asthmatic appears to be responsive to the acute requirement for increased airflow during whole-body exercise.

In-school asthma management and physical activity: children's perspectives

OBJECTIVE

Regular physical activity (PA) is an important component of pediatric asthma management. No studies have examined how in-school asthma management influences PA from children's perspectives. The aim of this study was to explore children's perceptions of the impact of in-school asthma management on PA.

METHODS

Qualitative interviews with 23 inner-city minority children with asthma (aged 8-10 yrs; 12 girls, 11 boys) were conducted in 10 Bronx, New York elementary schools. Sampling continued until saturation was reached. Interviews were recorded, transcribed and independently coded for common themes.

RESULTS

Interviews produced five themes representing students' perceptions about (1) asthma symptoms during in-school PA; (2) methods to control asthma episodes during school PA; (3) methods to prevent asthma episodes during school; (4) limited accessibility of asthma medications; and (5) negative feelings about asthma and medication use. The majority of students experienced asthma symptoms while performing PA during school. Primary methods of managing asthma symptoms were sitting out during activity, drinking water, and visiting the nurse. Students lacked awareness or adherence to action plans to prevent or control asthma. Students reported limited access to medication during school and feelings of embarrassment and/or concerns of teasing when medicating in front of others.

CONCLUSIONS

Our results indicate inappropriate in-school management of asthma symptoms, poor asthma control, lack of accessible medication, and stigma around publicly using asthma medication. Thus, students often missed or were withheld from PA. Interventions to improve in-school asthma care must consider ways to address these issues.

Comparison of six-minute walk test in children with moderate/severe asthma with reference values for healthy children

OBJECTIVE

to compare physical performance and cardiorespiratory responses in the six-minute walk test (6MWT) in asthmatic children with reference values for healthy children in the same age group, and to correlate them with intervening variables.

METHODS

this was a cross-sectional, prospective study that evaluated children with moderate/severe asthma, aged between 6 and 16 years, in outpatient follow-up. Demographic and spirometric test data were collected. All patients answered the pediatric asthma quality of life (QoL) questionnaire (PAQLQ) and level of basal physical activity. The 6MWT was performed, following the American Thoracic Society recommendations. Comparison of means was performed using Student's t-test and Pearson's correlation to analyze the 6MWT with study variables. The significance level was set at 5%.

RESULTS

40 children with moderate or severe asthma were included, 52.5% males, 70% with normal weight and sedentary. Mean age was 11.3±2.1 years, mean height was 1.5±0.1 m, and mean weight was 40.8±12.6 Kg. The mean distance walked in the 6MWT was significantly lower, corresponding to 71.9%±19.7% of predicted values; sedentary children had the worst values. The difference between the distance walked on the test and the predicted values showed positive correlation with age (r=0.373, p=0.018) and negative correlation with cardiac rate at the end of the test (r=-0.518, p<0.001). Regarding QoL assessment, the values in the question about physical activity limitations showed the worst scores, with a negative correlation with walked distance difference (r=-0.311, p=0.051).

CONCLUSIONS

asthmatic children's performance in the 6MWT evaluated through distance walked is significantly lower than the predicted values for healthy children of the same age, and is directly influenced by sedentary life style.

Mothers impose physical activity restrictions on their asthmatic children and adolescents: an analytical cross-sectional study

BACKGROUND

Physical activities are important for children and adolescents, especially asthmatics. A significant proportion is considered less active than their non-asthmatic peers and mother's beliefs about asthma are thought to be a determinant factor.The research objectives were to investigate whether mothers try to impose limitations on the physical activity (PA) of their asthmatic children/adolescents; identify associated factors; and explore if this attitude has any impact on children's PA levels.

METHODS

In this cross sectional investigation, we studied 115 asthmatics aged between 9 and 19 years and their mothers. Asthma severity, PA level and exercise induced bronchospasm (EIB) were evaluated. Mothers were questioned on their beliefs about physical activity in non-asthmatic and asthmatic children, if they imposed restrictions on their children's physical activity, on EIB perception and personal levels of anxiety and depression.

RESULTS

Ninety six percent of the mothers answered that PA are important for children and adolescents. Despite this, 37% of them admitted imposing restrictions to their children's PA. This attitude was associated with mother's negative opinions about asthmatics doing PA, perception of children's dyspnea after running on a treadmill, mother's anxiety level and children's asthma severity. The mother's restrictive attitudes were not associated with children's lower PA levels.

CONCLUSION

A high proportion of the mothers said that they restrained their asthmatic children from engaging in physical activity. This fact should be recognized by health professionals and discussed with parents and caregivers as these negative beliefs may lead to conflicts and prejudiced attitudes that could discourage children's involvement in physical activities and sports.

Validity and reliability of Physical Activity Enjoyment Scale questionnaire (PACES) in children with asthma

OBJECTIVE

The aim of this study is to test the psychometric properties of the Physical Activity Enjoyment Scale (PACES) in children with asthma.

METHOD

Participants included 185 children (age = 11.38 ± 1.12 years; body mass index = 20.66 ± 4.13 kg/m(2)): 107 children with asthma and 78 healthy children. To test the enjoyment of physical activity, PACES of Motl et al. was used in its Spanish version. In addition, the Physical Activity Questionnaire for Children (PAQ-C), Paediatric Asthma Quality of Life Questionnaire (PAQLQ) and Physical Self-Concept Questionnaire (CAF) have been used.

RESULTS

The results have shown a two-factor structure corresponding to the model whose settings have been good. PACES internal consistency was very high (Cronbach's alpha = 0.906). The PACES test-retest reliability indicates a good temporal concordance (Spearman rho = 0.868, p < 0.001). This presents an adequate concurrent validity with the total PAQLQ, the PAQ-C as well as with ability, fitness, attractiveness, strength and general physical self-concept.

CONCLUSIONS

The findings confirm that PACES is a valid and reliable measure of physical activity enjoyment in children with asthma.

The effectiveness of an indoor intermittent training program for improving lung function, physical capacity, body composition and quality of life in children with asthma

OBJECTIVE

The objective of this study is to analyze the effects of a 12-week indoor intermittent training program on lung function, physical capacity, body composition and quality of life in children with asthma.

METHODS

Participants were randomized in an experimental group (EG, 58 children, age = 11.55 ± 1.01 years) and in a control group (CG, 47 children, age = 11.51 ± 1.42 years). The training program was conducted indoors and consisted of alternating high- and low-intensity stimuli, for three sessions of 60 min/week, for 12 weeks. Physical exercise and sports activities were organized to follow the criteria of the American College of Sports Medicine (1999) and previous interventions' studies.

RESULTS

In EG, there was a significant improvement (p < 0.05) in FEV1, FEV6, 6MWT, handgrip strength, CMJ and flexibility. Reductions in BMI and fat mass as well as an increase in quality of life were all shown. The dyspnea index decreased significantly and there were no episodes of EIA. There is a significant positive correlation (p < 0.01) between the ΔFEV1 with Δhandgrip strength and Δ6MWT and a negative correlation with Δfat mass.

CONCLUSIONS

An indoor intermittent training program with these characteristics has improved lung function, physical capacity, body composition and quality of life in children with asthma. These training adaptations are particularly relevant for those patients suffering from asthma as a regular physical exercise routine will greatly improve their quality of life.

Daily physical activity in asthmatic children with distinct severities

OBJECTIVE

The objective of this study was to evaluate daily physical activity (DPA) in asthmatic children with different levels of disease severity, but with good asthma control, relative to a control group.

METHODS

This was a cross-sectional study in which a total of 121 children between the ages of 7 and 12 years old were evaluated; 72 were asthmatic children (32 mild, 24 moderate and 23 severe), and 42 children were not asthmatics. The asthmatic children studied had been in medical treatment for at least 6 months and experienced no change in symptoms during the 4 weeks prior to the study. The DPA was monitored over 6 days (4 weekdays and 2 weekend days). Motor activity was recorded with an accelerometer that measured the total number of steps (TNS), the number of steps in moderate physical activity (NS-MPA) and the duration, in minutes, of physical activity performed at moderate intensity.

RESULTS

There were no differences among the TNS performed by children with mild, moderate or severe persistent asthma and the control group (14 410 ± 4379, 14 710 ± 4892, 13 838 ± 3341 and 12 968 ± 3682 steps, respectively). The NS-MPA was also similar among all of the groups (6589 ± 2065, 6605 ± 2324, 6223 ± 1689 and 5990 ± 1840 steps, respectively). Sedentary asthmatic children were overweight more often than asthmatic children who were physically active, although lung function was not different between these groups.

CONCLUSION

Children with good asthma control, independent of disease severity, had DPA levels similar to children without asthma. However, more asthmatic children were overweight if sedentary as compared to physically active asthmatic children.

Evidence-based risk assessment and recommendations for physical activity clearance: respiratory disease

The 2 most common respiratory diseases are chronic obstructive pulmonary disease (COPD) and asthma. Growing evidence supports the benefits of exercise for all patients with these diseases. Due to the etiology of COPD and the pathophysiology of asthma, there may be some additional risks of exercise for these patients, and hence accurate risk assessment and clearance is needed before patients start exercising. The purpose of this review was to evaluate the available literature regarding the risks of exercise for patients with respiratory disease and provide evidence-based recommendations to guide the screening process. A systematic review of 4 databases was performed. The literature was searched to identify adverse events specific to exercise. For COPD, 102 randomized controlled trials that involved an exercise intervention were included (n = 6938). No study directly assessed the risk of exercise, and only 15 commented on exercise-related adverse events. For asthma, 30 studies of mixed methodologies were included (n = 1278). One study directly assessed the risk of exercise, and 15 commented on exercise-related adverse events. No exercise-related fatalities were reported. The majority of adverse events in COPD patients were musculoskeletal or cardiovascular in nature. In asthma patients, exercise-induced bronchoconstriction and (or) asthma symptoms were the primary adverse events. There is no direct evidence regarding the risk of exercise for patients with COPD or asthma. However, based on the available literature, it would appear that with adequate screening and optimal medical therapy, the risk of exercise for these respiratory patients is low.

Swimming training for asthma in children and adolescents aged 18 years and under

BACKGROUND

Asthma is the most common chronic medical condition in children and a common reason for hospitalisation. Observational studies have suggested that swimming, in particular, is an ideal form of physical activity to improve fitness and decrease the burden of disease in asthma.

OBJECTIVES

To determine the effectiveness and safety of swimming training as an intervention for asthma in children and adolescents aged 18 years and under.

SEARCH METHODS

We searched the Cochrane Airways Group's Specialised Register of trials (CENTRAL), MEDLINE , EMBASE, CINAHL, in November 2011, and repeated the search of CENTRAL in July 2012. We also handsearched ongoing Clinical Trials Registers.

SELECTION CRITERIA

We included all randomised controlled trials (RCTs) and quasi-RCTs of children and adolescents comparing swimming training with usual care, a non-physical activity, or physical activity other than swimming.

DATA COLLECTION AND ANALYSIS

We used standard methods specified in the Cochrane Handbook for Systematic reviews of Interventions. Two review authors used a standard template to independently assess trials for inclusion and extract data on study characteristics, risk of bias elements and outcomes. We contacted trial authors to request data if not published fully. When required, we calculated correlation coefficients from studies with full outcome data to impute standard deviation of changes from baseline.

MAIN RESULTS

Eight studies involving 262 participants were included in the review. Participants had stable asthma, with severity ranging from mild to severe. All studies were randomised trials, three studies had high withdrawal rates. Participants were between five to 18 years of age, and in seven studies swimming training varied from 30 to 90 minutes, two to three times a week, over six to 12 weeks. The programme in one study gave 30 minutes training six times per week. The comparison was usual care in seven studies and golf in one study. Chlorination status of swimming pool was unknown for four studies. Two studies used non-chlorinated pools, one study used an indoor chlorinated pool and one study used a chlorinated but well-ventilated pool.No statistically significant effects were seen in studies comparing swimming training with usual care or another physical activity for the primary outcomes; quality of life, asthma control, asthma exacerbations or use of corticosteroids for asthma. Swimming training had a clinically meaningful effect on exercise capacity compared with usual care, measured as maximal oxygen consumption during a maximum effort exercise test (VO2 max) (two studies, n = 32), with a mean increase of 9.67 mL/kg/min; 95% confidence interval (CI) 5.84 to 13.51. A difference of equivalent magnitude was found when other measures of exercise capacity were also pooled (four studies, n = 74), giving a standardised mean difference (SMD) 1.34; 95% CI 0.82 to 1.86. Swimming training was associated with small increases in resting lung function parameters of varying statistical significance; mean difference (MD) for FEV1 % predicted 8.07; 95% CI 3.59 to 12.54. In sensitivity analyses, by risk of attrition bias or use of imputed standard deviations, there were no important changes on effect sizes. Unknown chlorination status of pools limited subgroup analyses.Based on limited data, there were no adverse effects on asthma control or occurrence of exacerbations.

AUTHORS' CONCLUSIONS

This review indicates that swimming training is well-tolerated in children and adolescents with stable asthma, and increases lung function (moderate strength evidence) and cardio-pulmonary fitness (high strength evidence). There was no evidence that swimming training caused adverse effects on asthma control in young people 18 years and under with stable asthma of any severity. However whether swimming is better than other forms of physical activity cannot be determined from this review. Further adequately powered trials with longer follow-up periods are needed to better assess the long-term benefits of swimming.

Exercise training in children with asthma: a systematic review

Exercise can provoke asthma symptoms, such as dyspnoea, in children with asthma. Exercise-induced bronchoconstriction (EIB) is prevalent in 40-90% of children with asthma. Conversely, exercise can improve physical fitness. The purpose of this paper is to provide a systematic review of the literature regarding the effects of exercise training in children with asthma, particularly in relation to: EIB, asthma control, pulmonary function, cardiorespiratory parameters and parameters of underlying pathophysiology. A systematic search in several databases was performed. Controlled trials that undertook a physical training programme in children with asthma (aged 6-18 years) were selected. Twenty-nine studies were included. Training had positive effects on several cardiorespiratory fitness parameters. A few studies demonstrated that training could improve EIB, especially in cases where there was sufficient room for improvement. Peak expiratory flow was the only lung function parameter that could be improved substantially by training. The effects of training on asthma control, airway inflammation and bronchial hyper-responsiveness were barely studied. Owing to the overall beneficial effects of training and the lack of negative effects, it can be concluded that physical exercise is safe and can be recommended in children with asthma. A training programme should have a minimum duration of 3 months, with at least two 60 min training sessions per week, and a training intensity set at the (personalised) ventilatory threshold. Further research is recommended regarding the effects of exercise on underlying pathophysiological mechanisms and asthma control in children with asthma.

Perceived Factors Affecting Asthma Among Adolescents

Objective: To describe the development, implementation, and findings of a participatory media-based asthma afterschool program. Methods: A pilot study was conducted during the 2010/2011 school year in an inner-city Chicago high school with high asthma rates and poor asthma morbidity. Students met after school twice a week over 10 weeks. Students were given basic training in research and media production using photovoice participatory research technique and were instructed to identify personally relevant factors affecting asthma through photography and journaling. Students’ journal entries and photographs were qualitatively coded. Relative frequencies of codes were calculated to determine common themes among identified factors. Students worked with a videographer to compile their findings into informational videos, which were used to educate peers and community members about asthma. Results: Fifteen students aged 13 to 18 attended a mean of 11 sessions (out of 20). One hundred eighty photographs (mean = 12 per student) and 112 journal entries (mean = 7.5 per student) were reviewed, with 4 predominant positive and negative factors identified. Reported factors influencing students’ health and asthma included social support (22% of student photos and journal entries), neighborhood environment (17%), and lifestyle (28%), in addition to well-established asthma factors (43%). Conclusions: Results from the Student Asthma Research Team pilot demonstrate that adolescent students, given appropriate instruction and opportunity, are able to identify factors affecting their asthma. Interventions engaging adolescents via self-directed identification and participatory media production techniques hold promise as vehicles for enabling students to own and share health-related experiences through research and peer/community outreach.

The knowledge, attitudes and practices of parents of children with asthma in 29 cities of China: a multi-center study

BACKGROUND

Asthma is becoming increasingly prevalent among children in China. Poor parent knowledge and attitudes often contribute to inappropriate management practices, leading to deficiencies in the care process. We aimed to document the knowledge, attitudes and practices (KAP) of parents of children with asthma and analyze how knowledge and attitudes relate to practices. Our secondary objective was to identify the factors associated with parent KAP scores.

METHODS

A KAP questionnaire was distributed to parents caring for 2960 children (0-14 years) diagnosed with asthma for at least 3 months from China's 29 provinces. A 50-item questionnaire was devised for this cross-sectional survey based on a comprehensive review of the subject. Questionnaires were scored on 30 items regarding parent asthma-related KAP, with one point for every correct response and a possible range of 0-13 for knowledge, 0-7 for attitudes and 0-10 for practices. Higher scores indicated better KAP. Chi-squared tests and logistic regression were used to identify factors associated with practices and combined KAP scores.

RESULTS

The response rate was 83.95% (2485/2960). Only 18.31% (455/2485) of parents correctly answered ≥ 60% of the knowledge questions (mean = 5.69). Most (89.85%; 2226/2485) gave positive responses to ≥ 60% of the attitude questions (mean = 5.23) while 67.89% (1687/2485) correctly answered ≥ 60% of the practices questions (mean = 6.19). Knowledge and attitudes were positively associated with pulmonary function testing, regular physician visits, monitoring with a peak flow meter and the Children's Asthma Control Test questionnaire, avoidance of asthma triggers, using an inhaled β2 receptor agonist and adherence to medication regimen (p ≤ 0.05). Attitudes were also associated with allergen testing. In logistic regression analysis, high KAP scores (dichotomized by a cut-off score of 18) were positively associated with food allergy, rhinitis, physician visits, frequency of visits and parent education (p < 0.05, OR > 1).

CONCLUSIONS

Generally, the parents' KAP were poor. A gap between recommended and actual practice was observed, which may be related to inadequate knowledge about and poor attitudes toward childhood asthma. Improving knowledge and attitudes may encourage better practices among parents of children with asthma.

Attitudes of asthmatic and nonasthmatic children to physical exercise

PURPOSE

The aim of this study was to examine the physical activity of children with and without asthma in Greece, the factors affecting their intention to exercise, and the influence of gender.

METHOD

The study involved 50 children with asthma and 50 children without asthma, aged 9-14-years old. We used the leisure time exercise questionnaire to assess the frequency and intensity of exercise. The planned behavior scale examined seven factors affecting physical activity: attitude, intention, self-identity, attitude strength, social role model, information, and knowledge.

RESULTS

Asthmatic children did not differ significantly in mild, moderate, and overall level of physical activity from children without asthma but they participated less in intense and systematic exercise. The two asthmatic groups did not differ in any of the planned behavior factors. Significant differences between genders occurred with respect to self-identity and social role model. Boys appeared to exercise more regularly and intensely compared to girls.

CONCLUSION

Asthmatic children did not systematically participate in physical activity, preferring mostly mild and moderate intensity activities. Children with and without asthma had comparable positive attitudes and intentions toward exercise.

Exercise-related quality of life in subjects with asthma: a systematic review

OBJECTIVE

The purpose of this review was to analyze, based on a review of the current literature, the effects of physical activity on the quality of life (QoL) of subjects with asthma.

METHODS

The authors conducted a search of randomized controlled trials (RCTs) between January 2000 and August 2010 in a group of major databases of health sciences (Academic Search Complete, Directory of Open Access Journals, Elsevier--Science Direct, Highwire Press, PubMed, Scielo Global, Scirus, Scopus, SpringerLink, Taylor & Francis, and Wiley Interscience) with the keywords asthma, QoL, physical activity, exercise, training, and program in all possible combinations. Citations and references of each study selected were also examined.

RESULTS

Of the 1075 studies identified, only 11 were included. Five of these studies were performed in children between the ages of 7 and 15 and the remaining studies were performed on adults. Intervention programs were divided into aerobic training programs and breathing exercises programs. All aerobic training programs showed improvements in QoL, demonstrating a positive influence of aerobic training on asthma.

CONCLUSIONS

There is a noticeable trend in the benefit of aerobic training programs in the QoL for individuals with asthma. The breathing exercises programs were few and heterogeneous, making it difficult to reach a positive conclusion on whether it could be recommended for the improvement of QoL in this pathology. There is a great need for more RCTs with methodological rigor.

Public health interventions for asthma: an umbrella review, 1990-2010

CONTEXT

Asthma is a chronic respiratory disease increasingly prevalent in the U.S., particularly among children and certain minority groups. This umbrella review sought to assess and summarize existing systematic reviews of asthma-related interventions that might be carried out or supported by state or community asthma control programs, and to identify gaps in knowledge.

EVIDENCE ACQUISITION

Eleven databases were searched through September 2010, using terms related to four concepts: asthma, review, intervention, and NOT medication. Reviews of the effectiveness of medications, medical procedures, complementary and alternative medicine, psychological interventions, family therapy, and nutrients or nutritional supplements were excluded. Two coders screened each record and extracted data from the included reviews.

EVIDENCE SYNTHESIS

Data analysis was conducted from May to December 2010. Of 42 included reviews, 19 assessed the effectiveness of education and/or self-management, nine the reduction of indoor triggers, nine interventions to improve the provision of health care, and five examined other interventions. Several reviews found consistent evidence of effectiveness for self-management education, and one review determined that comprehensive home-based interventions including the reduction of multiple indoor asthma triggers are effective for children. Other reviews found limited or insufficient evidence because of study limitations.

CONCLUSIONS

State or community asthma control programs should prioritize (1) implementing interventions for which the present review found evidence of effectiveness and (2) evaluating promising interventions that have not yet been adequately assessed.