This study tested the equivalence of concurrently collected measurements of physical activity in children ages 3-5 years from the System for Observing Play and Leisure Activity in Youth (SOPLAY) and accelerometers. Accelerometry-based physical activity measurements were collected from 109 preschool children across 18 sites, and SOPLAY was used to…

This study compared the weekly training load (TL) variation across different measures. Fifty-two runners reported their heart rate and distance ran for each training session during four weeks of training. Heart rate measures were used to calculate the weekly TRaining IMPulse (W-TRIMP), whereas the distance ran was used to calculate the weekly…

Upper body force-velocity profiles to assess musculoskeletal performance are created using release speed (RS) of the barbell in a bench press throw (BPT). A more easily obtained variable is peak speed (PS) measured by a linear position transducer. We assessed the validity of predicting RS from measured PS. One hundred and seventy-eight throws from…

This study aimed to assess the agreement in physical activity (PA) estimates from Garmin Vivofit Jr. 3 (VFJ 3) and Fitbit Ace 3 (Ace 3) with a research-grade accelerometer (wGT3X-BT) in children under free-living conditions. Twenty-five children (Girls: 56%, Age: 10.1 ± 2.5 years, BMI: 17.1 ± 2.4 kg/m2) performed daily activities for 7 consecutive…

This study aimed to analyze the intrasession reliability of the rate of force development (RFD) in different time windows in squat jumps (SJ) performed at different knee starting angles, and identify the relationship of RFD with vertical jump height (VJH). Twenty male volleyball and basketball players participated. Athletes randomly performed SJ…

The aim of this study is to investigate the test-retest reliability of the Closed Kinetic Chain Upper Extremity Stability Test (CKCUEST) and modified-CKCUEST in children aged 7-10 years and to compare the two test versions within the same group. The study was completed with fifty-three children. Average, normalized, and power scores were obtained…

The aim of this study is to examine the available scientific evidence on the reliability and criterion validity of 6-minute run walk field-based test when administered to children and adolescents. Systematic searches were performed in three electronic databases (MEDLINE/PubMed, SPORTDiscuss and Scopus) from their inception until February 2024,…

Field-based tests of aerobic fitness that can be administered quickly and do not require maximal effort are desirable. The purpose was to develop and validate quarter-mile walk tests for 10--13-year-olds. Participants (N = 59) walked one mile on two different days. Walk times, heart rates, body mass, physical activity, and aerobic fitness were…

This study investigated whether exercise and physical activity identity are conceptually distinct factors. Undergraduate students (N = 647; M[subscript age] = 19.54 ± 1.86 years; 61% female) completed an online survey including the Exercise Identity Scale and a modified physical activity version. Confirmatory factor analysis largely supported a…

Physical activity (PA) promotion is an ideal intervention target for public health because it has the potential to help individuals feel better, sleep better, and perform daily tasks more easily, in addition to providing disease prevention benefits. There is strong evidence that individual-level theory-based behavioral interventions are effective…

This study examined the impact of Catch-Up Sleep Ratio (CSR) on health outcomes in Korean adults. Adjusted for age and gender, 2,484 participants were categorized into three groups: Weekday (CSR <1.0), Average (1.0 = CSR < 1.5), and Weekend (1.5 = CSR). Weekday participants were less likely to meet WHO's moderate physical activity guidelines…

As part of a validation study of the Exercise Planning and Scheduling (EPS), and Goal-Setting (EGS) Scales, which were translated from English to Brazilian Portuguese, we aim to: present evidence of reliability and validity for the translated scale; and, explore the effects of non-labeled response categories of rating scales. The sample comprised…

This study evaluated the reliability and construct validity of the 51-item Effective Early Childhood Physical Literacy Pedagogue self-report instrument (ECE-PLP) measuring Early Childhood Educators' (ECEs) perceived physical literacy (PPL) capabilities, knowledge, and practices for effectively promoting PL in young children. 494 ECEs completed the…

In 2011, the National Collaborative on Childhood Obesity Research established a Measures Registry (updated in 2020) for four key variables associated with childhood obesity. We analyzed the individual physical activity behaviors portion of the Measures Registry to highlight strengths and gaps in the reliability and validity literature for…