Dietary factors associated with obesity indicators and level of sports participation in Flemish adults : a cross-sectional study

BACKGROUND: Obesity develops when energy intake continuously exceeds energy expenditure, causing a fundamental chronic energy imbalance. Societal and behavioural changes over the last decades are held responsible for the considerable increase in sedentary lifestyles and inappropriate dietary patterns. The role of dietary fat and other dietary factors in the aetiology and maintenance of excess weight is controversial. The purposes of the present study were to investigate the dietary factors associated with body mass index (BMI) and waist circumference (WC), and to analyse whether dietary intake varies between subjects with different levels of sports participation. METHODS: Data for this cross-sectional study, including anthropometric measurements, 3-day diet diary and physical activity questionnaire, were collected by the Flemish Policy Research Centre Sport, Physical Activity and Health (SPAH) between October 2002 and April 2004. Results of 485 adult men and 362 women with plausible dietary records were analysed. Analyses of covariance were performed to determine the differences in dietary intake between normal weight, overweight and obese subjects, and between subjects with different levels of sports participation. RESULTS: Total energy intake, protein and fat intake (kcal/day) were significantly higher in obese subjects compared to their lean counterparts in both genders. Percentage of energy intake from fat was significantly higher in obese men compared to men with normal weight or WC. Energy percentages from carbohydrates and fibres were negatively related to BMI and WC in men, whereas in women a higher carbohydrate and fibre intake was positively associated with obesity. Alcohol intake was positively associated with WC in men. Subjects participating in health related sports reported higher intake of carbohydrates, but lower intake of fat compared to subjects not participating in sports. CONCLUSION: This study supports the evidence that carbohydrate, fat, protein and fibre intake are closely related to BMI and WC. The sex differences for dietary intake between obese men and women might reflect the generally higher health consciousness of women. Alcohol intake was only associated with WC, emphasizing the importance of WC as an additional indicator in epidemiological studies. Besides enhancing sports and physical activity, it is necessary to improve the knowledge about nutrition and to promote the well-balanced consumption of wholesome food

Isokinetic assessment of patellofemoral pain syndrome : a prospective study in female recruits

Objective: To investigate prospectively the influence of muscular parameters on the development of the patellofemoral pain syndrome (PFPS) in women during a basic military training. Methods: Before the military training, 62 healthy female recruits, aged 18-34 years, without a history of PFPS, underwent an isokinetic test ( concentric contractions of knee flexors and extensors at 60 degrees/s and 240 degrees/s, eccentric contractions at 30 degrees/s). They also completed a questionnaire and performed a single-leg horizontal hop test. After basic military training, they underwent a clinical evaluation to assess PFPS. Independent t-tests and chi-square tests were used to evaluate whether any significant difference existed prior to the development of PFPS between females with and without PFPS. Results: The incidence of PFPS was 42%. Significantly lower peak torque of the extensors at 60 degrees/s and 240 degrees/s were observed in females with PFPS compared to the control group. The relative peak extensor torque per body weight and BMI, the ratio peak torque flexors/extensors and the sports participation were also significantly lower in the PFPS group. Conclusions: Decreased quadriceps strength and insufficient sports participations seem to be risk factors for the development of PFPS. Consequently, strengthening of quadriceps seems an important parameter in the treatment and prevention of PFPS

Dietary factors associated with obesity indicators and level of sports participation in Flemish adults: a cross-sectional study

Abstract Background Obesity develops when energy intake continuously exceeds energy expenditure, causing a fundamental chronic energy imbalance. Societal and behavioural changes over the last decades are held responsible for the considerable increase in sedentary lifestyles and inappropriate dietary patterns. The role of dietary fat and other dietary factors in the aetiology and maintenance of excess weight is controversial. The purposes of the present study were to investigate the dietary factors associated with body mass index (BMI) and waist circumference (WC), and to analyse whether dietary intake varies between subjects with different levels of sports participation. Methods Data for this cross-sectional study, including anthropometric measurements, 3-day diet diary and physical activity questionnaire, were collected by the Flemish Policy Research Centre Sport, Physical Activity and Health (SPAH) between October 2002 and April 2004. Results of 485 adult men and 362 women with plausible dietary records were analysed. Analyses of covariance were performed to determine the differences in dietary intake between normal weight, overweight and obese subjects, and between subjects with different levels of sports participation. Results Total energy intake, protein and fat intake (kcal/day) were significantly higher in obese subjects compared to their lean counterparts in both genders. Percentage of energy intake from fat was significantly higher in obese men compared to men with normal weight or WC. Energy percentages from carbohydrates and fibres were negatively related to BMI and WC in men, whereas in women a higher carbohydrate and fibre intake was positively associated with obesity. Alcohol intake was positively associated with WC in men. Subjects participating in health related sports reported higher intake of carbohydrates, but lower intake of fat compared to subjects not participating in sports. Conclusion This study supports the evidence that carbohydrate, fat, protein and fibre intake are closely related to BMI and WC. The sex differences for dietary intake between obese men and women might reflect the generally higher health consciousness of women. Alcohol intake was only associated with WC, emphasizing the importance of WC as an additional indicator in epidemiological studies. Besides enhancing sports and physical activity, it is necessary to improve the knowledge about nutrition and to promote the well-balanced consumption of wholesome food.</p

Reliability, equivalence and respondent preference of computerized versus paper-and-pencil mental health questionnaires

The purpose of this study was to examine the reliability, equivalence and respondent preference of a computerized version of the General Health Questionnaire (GHQ-12), Symptom Checklist (SCL-90-R), Medical Outcomes Study Social Support Survey (MOSSSS), Perceived Stress Scale (PSS) and Utrecht Coping List (UCL) in comparison with the original version in a general adult population. Internal consistency, equivalence and preference between both administration modes was assessed in a group of participants (n = 130) who first completed the computerized questionnaire, followed by the traditional questionnaire and a post-assessment evaluation measure. Test-retest reliability was measured in a second group of participants (n = 115), who completed the computerized questionnaire twice. In both groups, the interval between first and second administration was set at one week. Reliability of the PC versions was acceptable to excellent; internal consistency ranged from α = 0.52-0.98, ICC&apos;s for test-retest reliability ranged from 0.58-0.92. Equivalence was fair to excellent with ICC&apos;s ranging from 0.54-0.91. Interestingly, more subjects preferred the computerized instead of the traditional questionnaires (computerized: 39.2%, traditional: 21.6%, no preference: 39.2%). These results support the use of computerized assessment for these five instruments in a general population of adults. © 2006 Elsevier Ltd. All rights reserved.status: publishe

Cervical Joint Position Sense in Hypobaric Conditions: A Randomized Double-Blind Controlled Trial.

Well-adapted motor actions require intact and well-integrated information from all of the sensory systems, specifically the visual, vestibular, and somatosensory systems, including proprioception. Proprioception is involved in the sensorimotor control by providing the central nervous system with an updated body schema of the biomechanical and spatial properties of the body parts. With regard to the cervical spine, proprioceptive information from joint and muscle mechanoreceptors is integrated with vestibular and visual feedback to control head position, head orientation, and whole body posture. Postural control is highly complex and proprioception from joints is an important contributor to the system. Altitude has been used as a paradigm to study the mechanisms of postural control. Determining the mechanisms of postural control that are affected by moderate altitude is important as unpressurized aircrafts routinely operate at altitudes where hypoxia may be a concern. Deficits in motor performance arise when the reliance on proprioceptive feedback is abolished either experimentally or because of a disorder. As pilots require good neck motor control to counteract the weight of their head gear and proprioceptive information plays an important role in this process, the aim of this study was to determine if hypoxia at moderate altitudes would impair proprioception measured by joint position sense of the cervical spine in healthy subjects. METHODS: Thirty-six healthy subjects (Neck Disability Index < 5) volunteered to participate. Neck position sense was evaluated using a three-dimensional motion analyzer. To create the environment, a hypobaric chamber was used to simulate artificial moderate altitude. Head repositioning error was measured by asking the subject to perform a head-to-neutral task after submaximal flexion-extension and right/left rotation movements, and a head-to-target task, in which the subjects had to return to a 30° right and left rotation position. FINDINGS: Exposure to artificial acute moderate altitude of 7,000 feet had no significant effects on cervical joint position sense measured by head repositioning accuracy in healthy subjects. Discussion/impact/recommendations: Postural control mechanisms are very sensitive to acute mild hypoxia and have been recently investigated. Acute hypobaric hypoxia at moderate and high altitudes has a negative effect on postural control. However, which part of the postural system is affected has not yet been determined and proprioception has been little investigated. The results from this study highlighted that in healthy subjects with good cervical spine proprioception at baseline, artificial hypoxia induced by the simulation of moderate altitude does not increase head repositioning error. Further studies should investigate cervical joint position sense in real aircraft, at different altitudes and in a group of experienced helicopter pilots, to evaluate the impact of moderate altitude on cervical joint position sense in a different population. Conducting the same experiments in a population of pilots and in real flight conditions should be considered, since various factors such as the level of proprioception, head posture, type of movement, head load, muscle fatigue, flight altitude, and the length of flight time might influence the kinesthetic sensitivity

Association between leisure time physical activity and stress, social support and coping: a cluster-analytic approach

Objectives: Identifying risk clusters of stress, anxiety and depression, taking into consideration social support and coping, two important factors through which leisure time physical activity may have stress-reducing effects, may lead to more effective exercise treatment strategies for stress. The aim of this study was to investigate whether stress, social support and coping cluster in meaningful ways in the general adult population, and whether individuals of these clusters also differ in anxiety, depression and different types of leisure time physical activity. Design: Cross-sectional study in a randomly chosen community based sample of adults in the Flemish region of Belgium. Method: A sample of 2616 Flemish adults, aged 18-75, completed two self-report computerized questionnaires on mental health, physical activity and demographic characteristics in the presence of a scientific staff member. Results: Three reliable clusters were identified in both males and females. The first cluster showed high levels of stress and ineffective coping and low levels of social support. The second one showed the opposite, and the third one an intermediate profile. Anxiety and depression were highest in persons of the stressed cluster and diminished gradually over the intermediate and the nonstressed ones. Sports participation and not other types of leisure time physical activity was significantly lower in the stressed cluster. Conclusions: By means of cluster analysis, risk groups of stress, anxiety and depression in adult males and females can be identified. Sports participation may have a beneficial effect in these at-risk groups. © 2006 Elsevier Ltd. All rights reserved.status: publishe

Secular trends in anthropometric characteristics, physical fitness, physical activity, and biological maturation in Flemish adolescents between 1969 and 2005

In this study, secular trends in anthropometric characteristics, physical fitness, physical activity and biological maturity over the past 25 to 35 years in Flemish adolescents were investigated. Representative cross-sectional samples of 12-18-year-old secondary school children (11899 assessments in boys in 1969-1974, 4899 girls in 1979-1980, 1429 boys and 1772 girls in 2005) and parent-offspring pairs tested at approximately the same age during adolescence (55 father-son pairs, mean age fathers=15.47y, mean age sons=15.38y; 62 mother-daughter pairs, mean age mothers=16.63y, mean age daughters=15.01y) were used. The cross-sectional data were analysed in six yearly age-categories using Wilcoxon rank sum tests. For the parent-offspring data paired t-tests, simple linear regressions to adjust for parent-offspring differences in chronological age and multiple linear regressions to adjust for parent-offspring differences in chronological and skeletal age were conducted. The cross-sectional study generally revealed an increase in weight, stature, BMI, skinfolds and trunk-extremity index and a decrease in the performance on several physical fitness tests. In the parent-offspring study, only sons were maturationally advanced compared to fathers. Even after adjustment for parent-offspring differences in chronological age and in chronological and skeletal age, results for stature, trunk-extremity index and physical fitness were generally similar to the cross-sectional study. No secular trend was observed for sports participation. The fact that the positive secular trends in weight, BMI and skinfolds of the cross-sectional study were not entirely confirmed in the parent-offspring study is probably due to higher similarity in genetic and familial background, higher socio-economic status and more health-consciousness of the latter.status: publishe

A surface electromyography based objective method to identify patients with nonspecific chronic low back pain, presenting a flexion related movement control impairment

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