& Inman, 1964 ), and the extrinsic muscles are active in the push-off phase ( Akuzawa, Imai, Iizuka, Matsunaga, & Kaneoka, 2016 ; Péter, Hegyi, Stenroth, Finni, & Cronin, 2015 ) during walking. A correlation between the cross-sectional area of these plantar intrinsic and extrinsic muscles and the value
Mieko Yokozuka, Chie Miki, Makoto Suzuki and Rieko Katsura
Taniya S. Nagpal, Catherine Everest, Sara C.S. Souza, Danilo F. da Silva, Shuhiba Mohammad, Jayonta Bhattacharjee and Kristi B. Adamo
characteristics were compared at baseline using the independent t test for continuous variables and the Pearson χ 2 test for categorical variables. Normality was tested based on the Shapiro–Wilk test, and, when assumed, correlations between sedentary time and the other outcomes were performed with the Pearson
Robert M. Nideffer
This study examined the effects that varying subjects’ response sets on the Test of Attentional and Interpersonal Style (TAIS) had on predictive validity. Fifteen elite divers took the TAIS under two response conditions. Initially they answered the items without a specific set or comparison group in mind. The second time they were instructed to compare themselves with other elite divers. It was hypothesized that by telling divers who to compare themselves to and by providing them with a situation-specific response set, this would increase the correlations between performance and TAIS scores. The implications and consequences of response set manipulations are discussed.
Deborah Kendzierski, R. Michael Furr Jr. and Jennifer Schiavoni
Three studies investigated the correlates of physical activity self-definitions among undergraduate exercisers and athletes, and examined the perceived criteria for defining oneself as a weightlifter, basketball player, and exerciser. Perceptions about behavior, motivation-related variables, and social world variables showed consistent relationships with self-definition; correlations between self-definition and enjoyment varied according to activity. Although affective criteria were mentioned by a sizable number of those with and without physical activity self-definitions, participants cited far more behavioral than affective criteria. Other frequently mentioned criteria were also identified. Implications for self-inference are discussed and a preliminary model of physical activity self-definition is presented.
Martin Stevens, Anita Bakker-van Dijk, Mathieu H.G. de Greef, Koen A.P.M. Lemmink and Piet Rispens
The purpose of this study was to assess the reliability and validity of a Dutch translation of a questionnaire to measure self-efficacy in leisure-time physical activity. The questionnaire consisted of three subscales measuring three dimensions of self-efficacy. It was completed by 461 participants, 55–65 years old. Fifty-nine participants took part in a test-retest study. Factor analysis and correlations between the sum-scores of the 3 scales confirmed that each scale measures a different dimension of self-efficacy. The criterion-related validity of 2 of the scales was found to be moderate. All 3 scales had a satisfactory internal consistency, indicating that they are reliable. Stability was assessed with a test-retest procedure, which yielded satisfactory results for 2 of the 3 scales. The results revealed an improvement in self-efficacy for 2 of the scales over a 4-week time period. When outliers were excluded, satisfactory values were obtained for intraclass correlation coefficients between the first and second measurements.
Johanne Desrosiers, François Prince, Annie Rochette and Michel Raîche
The objectives of this study were to standardize measurement procedures and study the test-retest and interrater reliability of the belt-resisted method for measuring the lower extremity isometric strength of three muscle groups. The strength of 33 healthy, elderly, community-dwelling subjects was evaluated with a hand-held dynamometer using the belt-resisted method. Isometric strength testing of three muscle groups (hip flexors, knee extensors, and ankle dorsiflexors) was performed on two separate occasions, I week apart, by the same tester to determine test-retest reliability. The test results of two different examiners testing on different days were used to determine interrater reliability. Test-retest reliability was higher than interrater reliability. Test-retest reliability coefficients of the three muscle groups were high (J9-.95). For interrater reliability, intraclass correlation coefficients varied from .64 to .92. depending on the muscle group and side. For the two kinds of reliability, intraclass correlation coefficients increased from proximal to distal. The method for the hip muscle group should be modified to increase reliability of the measure.
Sjaan R. Gomersall, Toby G. Pavey, Bronwyn K. Clark, Adib Jasman and Wendy J. Brown
Sedentary behavior is continuing to emerge as an important target for health promotion. The purpose of this study was to determine the validity of a self-report use of time recall tool, the Multimedia Activity Recall for Children and Adults (MARCA) in estimating time spent sitting/lying, compared with a device-based measure.
Fifty-eight participants (48% female, [mean ± standard deviation] 28 ± 7.4 years of age, 23.9 ± 3.05 kg/m2) wore an activPAL device for 24-h and the following day completed the MARCA. Pearson correlation coefficients (r) were used to analyze convergent validity of the adult MARCA compared with activPAL estimates of total sitting/lying time. Agreement was examined using Bland-Altman plots.
According to activPAL estimates, participants spent 10.4 hr/day [standard deviation (SD) = 2.06] sitting or lying down while awake. The correlation between MARCA and activPAL estimates of total sit/lie time was r = .77 (95% confidence interval = 0.64–0.86; P < .001). Bland-Altman analyses revealed a mean bias of +0.59 hr/day with moderately wide limits of agreement (–2.35 hr to +3.53 hr/day).
This study found a moderate to strong agreement between the adult MARCA and the activPAL, suggesting that the MARCA is an appropriate tool for the measurement of time spent sitting or lying down in an adult population.
Lynn B. Panton, Michael R. Kushnick, J. Derek Kingsley, Robert J. Moffatt, Emily M. Haymes and Tonya Toole
To evaluate physical activity with pedometers and health markers of chronic disease in obese, lower socioeconomic African American women.
Thirty-five women (48 ± 8 y) wore pedometers for 2 weeks. One-way analyses of variances were used to compare age, weight, body mass indices (BMI), and health markers of chronic disease (including blood pressure, cholesterol, triglycerides, glycosylated hemoglobin, fibrinogen, C-reactive protein) between women who were classified by steps per day as sedentary (SED < 5,000; 2,941 ± 1,161 steps/d) or active (ACT ≥ 5,000; 7,181 ± 2,398 steps/d).
ACT had significantly lower BMI (ACT: 37.2 ± 5.6; SED: 44.4 ± 7.2 kg/m2) and hip circumferences (ACT: 37.2 ± 5.6; SED: 44.4 ± 37.2 cm) and higher total cholesterol (ACT: 230 ± 53; SED: 191 ± 32 mg/dL) than SED. There were no differences in health markers of chronic disease between SED and ACT. Pearson product moment correlations showed significant negative correlations between steps/d and weight (r = –.42), BMI (r = –.46), and hip circumference (r = –.47).
Increased levels of physical activity were associated with reduced BMI and hip circumferences but were not associated with lower health markers for chronic disease in obese, lower socioeconomic African American women.
Au Bich Thuy, Leigh Blizzard, Michael Schmidt, Costan Magnussen, Emily Hansen and Terence Dwyer
Pedometer measurement of physical activity (PA) has been shown to be reliable and valid in industrialized populations, but its applicability in economically developing Vietnam remains untested. This study assessed the feasibility, stability and validity of pedometer estimates of PA in Vietnam.
250 adults from a population-based survey were randomly selected to wear Yamax pedometers and record activities for 7 consecutive days. Stability and concurrent validity were assessed using intraclass correlation coefficients (ICC) and Spearman correlation coefficients.
Overall, 97.6% of participants provided at least 1 day of usable recordings, and 76.2% wore pedometers for all 7 days. Only 5.2% of the sample participants were involved in work activities not measurable by pedometer. The number of steps increased with hours of wear. There was no significant difference between weekday and weekend in number of steps, and at least 3 days of recordings were required (ICC of the 3 days of recordings: men 0.96, women 0.97). Steps per hour were moderately correlated (men r = .42, women r = .26) with record estimates of total PA.
It is feasible to use pedometers to estimate PA in Vietnam. The measure should involve at least 3 days of recording irrespective of day of the week.
Andreas Wolff Hansen, Inger Dahl-Petersen, Jørn Wulff Helge, Søren Brage, Morten Grønbæk and Trine Flensborg-Madsen
The International Physical Activity Questionnaire (IPAQ) is commonly used in surveys, but reliability and validity has not been established in the Danish population.
Among participants in the Danish Health Examination survey 2007–2008, 142 healthy participants (45% men) wore a unit that combined accelerometry and heart rate monitoring (Acc+HR) for 7 consecutive days and then completed the IPAQ. Background data were obtained from the survey. Physical activity energy expenditure (PAEE) and time in moderate, vigorous, and sedentary intensity levels were derived from the IPAQ and compared with estimates from Acc+HR using Spearman’s correlation coefficients and Bland-Altman plots. Repeatability of the IPAQ was also assessed.
PAEE from the 2 methods was significantly positively correlated (0.29 and 0.49; P = 0.02 and P < 0.001; for women and men, respectively). Men significantly overestimated PAEE by IPAQ (56.2 vs 45.3 kJ/kg/day, IPAQ: Acc+HR, P < .01), while the difference was nonsignificant for women (40.8 vs 44.4 kJ/kg/day). Bland-Altman plots showed that the IPAQ overestimated PAEE, moderate, and vigorous activity without systematic error. Reliability of the IPAQ was moderate to high for all domains and intensities (total PAEE intraclass correlation coefficient = 0.58).
This Danish Internet-based version of the long IPAQ had modest validity and reliability when assessing PAEE at population level.