Engaging in muscle strengthening activities (MSA) as part of a physical activity program offers health benefits. Although the merits of physical activity are well documented, many adults fail to meet appropriate levels as recommended in the 2008 Physical Activity Guidelines for Americans (PAGA). To get a more complete understanding on an individual's physical activity behaviors, the Tracking Resistance Exercise and Strength Training (TREST) internet based survey was developed. The purpose of the current study was to determine the test-retest reliability of TREST items. Additionally, the prevalence of participants meeting the 2008 PAGA was reported by gender. The survey was completed approximately two weeks apart by 224 (52% male) undergraduate kinesiology students. Analysis of the survey items presented TREST as a reliable instrument in assessing an individual's physical activity behavior with a focus on MSA. Among the convenience sample of 445 participants (56% male) that completed the survey in assessment #1, 73% met the 2008 PAGA minimum recommendations for MSA (>=2 days/week) and aerobic activity (>= 150 min MVPA). A more complete MSA and MVPA criteria was established (requiring MSA of all seven major muscle groups) and only 32% of participants met this guideline. In general, men engaged in aerobic exercise and MSA more than women. These results cannot be generalized due the age, activity level, and education of the study's participants. Future studies should investigate the validity of TREST items among a sample of varying fitness levels, races/ethnicities, ages, and educational levels.

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Tyrime dalyvavo 18 - 69 metų amžiaus 92 tiriamieji, 63 moterys ir 29 vyrai. Darbe naudoti tiesioginis (akselerometrija) ir netiesioginis (IPAQ-LT trumposios versijos klausimynas) metodai, siekiant įvertinti tiriamųjų bendrą savaitės fizinį aktyvumą ir palyginti gautus duomenis tarpusavyje. Kiekvienas tyrimo dalyvis IPAQ-LT trumposios versijos anketą pildė baigęs fizinio aktyvumo (FA) vertinimą akselerometru (buvo prisimenamas FA praėjusios savaitės – pirmas anketų pildymo atvejis) ir kitą - po savaitės baigus FA vertinimą akselerometru (buvo prašoma ,,prisiminti“ FA vykusį už praėjusią savaitę - antras anketų pildymo atvejis). Pagal IPAQ-LT trumposios versijos pirmo ir antro anketos pildymo atvejų gautus bendrus savaitės fizinio aktyvumo duomenis, tarp pirmo ir antro anketos pildymo atvejų egzistuoja vidutinis koreliacinis ryšys (rho=0,531, p=0,01). Vertinant akselerometro pagalba gautus duomenis ir lyginant juos su anketų duomenimis (bendro savaitės fizinio aktyvumo pirmo ir antro anketos pildymo atvejų) tarp akselerometro nustatyto FA ir IPAQ-LT pirmo anketų pildymo atvejo egzistuoja silpnas koreliacinis ryšys (r=0,270, p=0,009), o tarp antro IPAQ-LT anketų pildymo atvejo – labai silpnas ryšys (r=0,057, p=0,591). Tyrimo metu gauti rezultatai leidžia teigti, kad dauguma tyrime dalyvavusių savanorių savo fizinį aktyvumą buvo linkę pervertinti. Tyrimo objektas - IPAQ-LT trumposios versijos klausimynas ir jo patikimumo bei pagrįstumo nustatymas. Darbo tikslas – nustatyti... [toliau žr. visą tekstą] / The study involved 92 18 - 69 year old subjects, 63 women and 29 men. In our work we used the direct (accelerometer) and indirect (IPAQ-LT short version of the questionnaire) methods to assess the total weekly physical activity and compare the findings with each other. Each study participant the first International physical activity questionnaire short Lithuanian version filled when completed physical activity estimation with accelerometer (physical activity was remembered of the last week - the first case of the questionnaires filling and another - after a week when physical activity estimation was completed with accelerometer (was asked „to remember“ physical activity that was done for the last week - the second case of the questionnaires filling). According to the IPAQ-LT short version the first and second questionnaire filling cases received the total weekly physical activity data between the first and second questionnaire filling cases exists a moderate correlation (rho=0,531, p=0,01). Evaluating the data of accelerometer and comparing them with the questionnaire data (the first and second guestionnaire filling cases of the total weekly physical activity) between the accelerometer and the the first guestionnaires filling case there is a small correlation (r=0,270, p=0,009), but between the second guestionnaires filling case - a very small (negligible) correliation (r=0,057, p=0,591). The study results suggest that the majority of volunteers in the study of their... [to full text]

Made available in DSpace on 2014-08-20T13:57:55Z (GMT). No. of bitstreams: 1 Tese_Felipe_Fossati_Reichert_parte_1.pdf: 38374 bytes, checksum: 5b8b2b63f3fda834f969b2df28aa7a06 (MD5) Previous issue date: 2008-07-15 / Background: Prospective studies on physical activity (PA), diet, and body composition in adolescents are lacking, particularly outside high-income countries. The aims of this paper were to describe the methods used for assessing these variables in the 1993 Pelotas (Brazil) Birth Cohort, and to discuss the fieldwork challenges faced and alternatives to overcome them. Methods: In 2006-7 a sub-sample of the 1993 Pelotas cohort was revisited. PA was estimated using questionnaires, a combined heart rate and motion sensor (Actiheart), and the Actigraph GT1M accelerometer. Diet was investigated by questionnaire. Total body water was determined by stable isotopes. Thirty individuals had their total energy expenditure assessed by double labeled water. All data were collected at participants home. Results: The logistics of the fieldwork and the difficulties in undertaking the study and alternatives to overcome them are presented. Preliminary analyses show that 511 individuals were traced (response rate = 90.0%). Compliance of both adolescents and their families for the motion sensors and body composition measurements was excellent. Conclusions: We conclude it is feasible to carry out high-quality studies on PA in developing countries. We hope the present manuscript will be useful to other researchers interested in carrying out similar studies. / Objetivos: Estudos prospectivos sobre a atividade física (AF), dieta e composição corporal em adolescentes são faltando, principalmente fora de países de alta renda. Os objetivos deste trabalho foram descrever os métodos utilizados para a avaliação dessas variáveis em 1993 Pelotas (Brasil) Birth Cohort, e discutir o trabalho de campo os desafios enfrentados e as alternativas para superá-los. Métodos: Em 2006-7 uma sub-amostra da coorte de Pelotas de 1993, foi revisitado. PA foi estimada utilizando questionários, uma frequência cardíaca combinado e sensor de movimento (Actiheart), ea actigráfico Acelerômetro GT1M. A dieta foi investigada por meio de questionário. Água corporal total foi de determinado por isótopos estáveis. Trinta indivíduos tiveram seu gasto energético total avaliada pela água etiquetada dupla. Todos os dados foram coletados em casa dos participantes. Resultados: A logística do trabalho de campo e as dificuldades em realizar o estudo e as alternativas para superar eles são apresentados. Análises preliminares mostram que 511 pessoas foram rastreados (taxa de resposta = 90,0%). Cumprimento de ambos os adolescentes e suas famílias para o sensores de movimento e medidas de composição corporal foi excelente. Conclusões: Concluímos que é viável realizar estudos de alta qualidade sobre a PA nos países em desenvolvimento. Esperamos que o manuscrito presente será útil para outros pesquisadores interessados em realizar estudos semelhantes.