International journal of exercise science最新文献

Comprehensive Fitness Assessment in a Professional Military Education Cohort: A Cross-Sectional Study. 军事专业教育队列综合体能评估：横断面研究。

International journal of exercise science Pub Date : 2025-09-01 eCollection Date: 2025-01-01 DOI: 10.70252/WUPH8495

Daniel J Lawson, Russell K Lowell, Christopher B Mobley, Katherine Frick, Nicholas C Bordonie, Katie G Clouse, Cameron D Ott, Harrison C Dimick, Nick R Mauldin, JoEllen M Sefton

{"title":"Comprehensive Fitness Assessment in a Professional Military Education Cohort: A Cross-Sectional Study.","authors":"Daniel J Lawson, Russell K Lowell, Christopher B Mobley, Katherine Frick, Nicholas C Bordonie, Katie G Clouse, Cameron D Ott, Harrison C Dimick, Nick R Mauldin, JoEllen M Sefton","doi":"10.70252/WUPH8495","DOIUrl":"10.70252/WUPH8495","url":null,"abstract":"Military personnel face rigorous physical and cognitive demands critical for operational readiness and long-term health. This study evaluated body composition, cognitive performance, and physical fitness metrics in non-entry-level service members to inform tailored fitness interventions. This cross-sectional study analyzed data from Air Command Staff College personnel (N = 307; 89 females, 218 males; age: 37 ± 5 years) at Air University, Maxwell Air Force Base. Participants completed assessments for body composition (body mass index [BMI], body fat percentage [%BF], fat mass index [FMI], fat-free mass index [FFMI]), flexibility (sit-and-reach test, functional reach test), cognitive performance (cognitive reaction time), power (countermovement jump), strength (grip strength, isometric midthigh pull), muscular endurance (plank), and aerobic fitness (Estimated VO2max). Relationships between age, sex, and fitness variables were analyzed with regression models, with percentile ranking, and comparisons to the American College of Sports Medicine (ACSM) guidelines. Age-related increases in BF% (r = 0.116, p = 0.045) and FMI (r = 0.129, p = 0.025) were observed, alongside declines in muscular strength, power, and endurance (all p < 0.01). Females exhibited higher BF% and FMI, while males had greater FFMI and strength. Older participants had lower compliance with ACSM standards, indicating elevated health risks. Targeted interventions should address age- and sex-specific needs, focusing on preserving lean mass, strength, and cognitive agility. Baseline fitness data contributes to designing evidence-based programs that enhance long-term readiness and operational performance.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"18 8","pages":"811-835"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12408081/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145000498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rear Leg-derived Moment Contributes to Resistance Against Hip Extension in Bulgarian Split Squats. 在保加利亚分腿深蹲中，后腿产生的力矩有助于抵抗髋部伸展。

International journal of exercise science Pub Date : 2025-09-01 eCollection Date: 2025-01-01 DOI: 10.70252/NEXQ5666

Hiroshi Arakawa, Hikaru Nakashima, Xuanrui Li, Michiya Tanimoto

{"title":"Rear Leg-derived Moment Contributes to Resistance Against Hip Extension in Bulgarian Split Squats.","authors":"Hiroshi Arakawa, Hikaru Nakashima, Xuanrui Li, Michiya Tanimoto","doi":"10.70252/NEXQ5666","DOIUrl":"10.70252/NEXQ5666","url":null,"abstract":"The Bulgarian split squat (BSS) is a unilateral exercise that emphasizes hip extension more than knee extension, compared to other squat variations. This study aimed to (1) empirically verify the existence of the rear leg-derived moment (MRL)-a theoretically plausible but previously untested external resistive hip moment acting against the net hip extension moment (MHE) of the front leg-and (2) examine how stance width and forward trunk-leaning angles affect MRL during the BSS. Nine trained male participants performed bodyweight BSS under two stance conditions (wide and narrow) and three trunk-leaning conditions (additional, natural, and reduced forward lean). A motion capture system and force platforms were used to calculate MRL, head-arm-trunk segment-derived gravitational moment (MHAT), and MHE. MRL substantially contributed to the total external resistance acting against the front hip extensors, ranging from 76 to 86 Nm in the wide stance and 49 to 71 Nm in the narrow stance, accounting for 70-97% and 62-98% of the total resistance (MHAT + MRL), respectively. In the narrow stance, MRL increased significantly as the trunk became more upright. The combined MRL and MHAT closely matched MHE, supporting the validity of the proposed mechanical model. These findings provide the first experimental evidence of MRL as a key resistance factor in the BSS. Moreover, MRL may enable practitioners to increase mechanical loading on the hip extensors while maintaining a more upright trunk posture, offering a potential advantage for strength training programs aiming to target the hip extensors with minimal forward trunk inclination.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"18 7","pages":"881-894"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12408075/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145000537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Idmatch Bike Fitting Enhances Power Output in Recreational Cyclists: A Pilot Study. Idmatch自行车配件提高休闲骑自行车者的动力输出：一项试点研究。

International journal of exercise science Pub Date : 2025-09-01 eCollection Date: 2025-01-01 DOI: 10.70252/CMDY5909

Evan T Hoyt, Gregory N Ruegsegger

{"title":"Idmatch Bike Fitting Enhances Power Output in Recreational Cyclists: A Pilot Study.","authors":"Evan T Hoyt, Gregory N Ruegsegger","doi":"10.70252/CMDY5909","DOIUrl":"10.70252/CMDY5909","url":null,"abstract":"Optimizing bike position is essential for enhancing cycling performance, improving comfort, and reducing injury risk. This study examined the acute effects of a bike fit using the idmatch® system on power output, rate of perceived exertion (RPE), and discomfort in recreational cyclists. Twelve participants (10 males, 2 females; 37.0 ± 9.4 years) underwent an idmatch system bike fit, which employs three-dimensional motion capture to optimize rider position. Cyclists completed a six-second peak power test (PPT6) and a 20-minute functional threshold power (FTP) test before and after the fit. Performance metrics (power, cadence, and torque) and subjective measures (RPE, discomfort and region-specific pain) were recorded. Post-fit, peak power during the PPT6 test was 8.6% higher (pre: 952.1 ± 268.2 W; post: 1033.6 ± 263.6 W; p = 0.043). In the post-fit FTP test, average power output (pre: 190.0 ± 50.0 W; post: 198.7 ± 47.8 W; p = 0.047) and torque (pre: 15.6 ± 3.5 ft-lb.; post: 16.6 ± 2.2 ft-lb.; p = 0.035) were increased, while RPE (p = 0.029) and discomfort (p = 0.035) were decreased compared to pre-fit values. Performance improvements in both tests were positively correlated with the magnitude of saddle-to-handlebar distance adjustment (p < 0.05). Self-reported hand, foot, and hamstring pain trended lower following the bike fit (all: p = 0.125). These findings suggest that optimizing bike configuration using the idmatch system acutely improves power production and reduce discomfort in recreational cyclists. Motion-capture-based fitting systems may offer a practical solution for enhancing cycling performance.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"18 2","pages":"864-880"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12408072/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145000580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Associations of Laboratory- and Field- derived Measurements of Critical Power with W'-kinetics during 40-km Cycling Time Trial Performances. 在40公里自行车计时赛期间，实验室和现场衍生的临界功率与W'动力学测量的关联。

International journal of exercise science Pub Date : 2025-09-01 eCollection Date: 2025-01-01 DOI: 10.70252/NEFW5464

D Luke Wilkins, Julie E Taylor, Robert W Pettitt, Mark Kramer

{"title":"Associations of Laboratory- and Field- derived Measurements of Critical Power with W'-kinetics during 40-km Cycling Time Trial Performances.","authors":"D Luke Wilkins, Julie E Taylor, Robert W Pettitt, Mark Kramer","doi":"10.70252/NEFW5464","DOIUrl":"10.70252/NEFW5464","url":null,"abstract":"This study aimed to establish whether a laboratory (lab) based 3-minute all-out (3MT) protocol and a field-based 3MT protocol would yield similar peak power (Pmax), critical power (CP), and curvature constant (W') profiles and the implications of parameter estimation for informing a 40-km time trial (TT) performance. Nine competitive male cyclists (mean ± SD: age 36.5 ± 10.42 y, mass = 80.5 ± 10.6 kg, height 1.8 ± 0.1 m) completed two 3MTs on separate days, as well as a 40-km time trial. Both lab and field-based protocols evoked similar CP (p = 0.160) and W' (p = 0.200) profiles, but Pmax (p = 0.012) may be more sensitive to biomechanical disparities and testing environment. Strong positive associations were observed with W'-kinetics (r = 0.73) and W' (r = 0.83) and moderate-to-strong negative associations with mean TT power (r = -0.75) and CP (r = -0.68). TT power outputs occur at 59-65% of CP, and finishing times appear to be informed by CP, W' and Pmax with high degrees of accuracy (R2 > 0.90). Although TT performances occur predominantly within the moderate-to-heavy intensity domains, the mean intensity from a cardiovascular and core temperature perspective was high (i.e., ~90% HRmax; ~39°C). TT performances appear to be accurately informed by CP, W' and Pmax, with W' dominating the predictive capacity associated with longer TT performances.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"18 8","pages":"757-773"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12408082/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145000587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Blood Flow Restriction Use by U.S. Physical Therapists: A Survey on Settings, Equipment, and Adverse Effects. 美国物理治疗师使用血流限制：一项关于设置、设备和不良反应的调查。

International journal of exercise science Pub Date : 2025-09-01 eCollection Date: 2025-01-01 DOI: 10.70252/ZJRV6089

Alyssa M Weatherholt, William R VanWye, Netra Patel, Lexi Humphrey

{"title":"Blood Flow Restriction Use by U.S. Physical Therapists: A Survey on Settings, Equipment, and Adverse Effects.","authors":"Alyssa M Weatherholt, William R VanWye, Netra Patel, Lexi Humphrey","doi":"10.70252/ZJRV6089","DOIUrl":"10.70252/ZJRV6089","url":null,"abstract":"Blood flow restriction (BFR) combined with exercise has been shown to enhance muscle hypertrophy, strength, and aerobic capacity. While previous studies have evaluated the use of BFR among various practitioners, none have investigated its use exclusively among licensed U.S. physical therapists (PTs). A cross-sectional survey was distributed electronically to licensed U.S. PTs. Participants were required to use BFR currently in clinical practice. Survey items included respondents' demographics, practice setting, exercise mode, the type of BFR equipment used, and adverse events. A total of 134 licensed PTs from 20 states completed the survey. BFR was most commonly used in outpatient orthopedic settings, primarily in conjunction with resistance exercises. The Delfi unit was the most frequently used device (64%). No major adverse effects reported (e.g., thrombosis, rhabdomyolysis, nerve damage). Minor adverse effects, including dizziness, numbness, nausea, and delayed onset muscle soreness, were reported by 8% of participants (n = 11). This survey found no major adverse effects and a low prevalence of minor, transient adverse effects. These findings are consistent with previous BFR safety literature and provide a foundational overview of BFR practices among U.S. PTs.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"18 5","pages":"736-746"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12408079/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145000509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Differences in Fitness Between Cadet and General Population Firefighter Academy Recruits. 消防学院学员与普通人群体能差异研究。

International journal of exercise science Pub Date : 2025-09-01 eCollection Date: 2025-01-01 DOI: 10.70252/PHHC4783

Scott D Brau, David J Cornell, Benjamin J Mendelson, Rudi A Marciniak, Kyle T Ebersole

{"title":"Differences in Fitness Between Cadet and General Population Firefighter Academy Recruits.","authors":"Scott D Brau, David J Cornell, Benjamin J Mendelson, Rudi A Marciniak, Kyle T Ebersole","doi":"10.70252/PHHC4783","DOIUrl":"10.70252/PHHC4783","url":null,"abstract":"This longitudinal study explored entry route- and age-related fitness differences between cadet (CR) and general population (GR) firefighter recruits. Fitness data were collected from eight separate firefighter recruit academy cohorts (N = 317; 122 CR, 195 GR; 27.17 ± 7.58 yrs, 177.30 ± 8.72 cm, 88.65 ± 17.78 kg). In the first week of the academy, recruits completed an assessment battery including: body composition via skinfold measures to estimate body fat (BF, %) and fat-free mass (FFM, kg); aerobic fitness (VO2peak, mL· kg-1· min-1) and heart rate recovery (HRR1min, %) estimated from the five-minute Forestry Step Test; movement quality via a squat-based movement screen (MES, 0-100); muscular strength via the sum of right and left handgrip (SHG, kg); and muscular endurance via a two-minute push-up test. Due to non-normally distributed data, non-parametric statistical tests were used. Wilcoxon rank-sum tests (α < 0.05) evaluated fitness differences between entry routes. Kruskal-Wallis tests evaluated differences between four age groups: A1 (19-21 yrs), A2 (22-29 yrs), A3 (30-39 yrs), and A4 (40+ yrs). CR had significantly (p < 0.05) lower age, BM, BF, and FFM, but greater MES, VO2peak, HRR1min, and PU. A1 had lower BM, BF, and FFM; and greater VO2peak, HRR1min, and PU (p < 0.01) than all other ages. The range of fitness in recruits upon academy entry necessitates careful programming to support optimization of fitness in all recruits, regardless of age. The fitness elements of an academy may present opportunities to build health and fitness literacy, necessary for career longevity.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"18 8","pages":"774-793"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12408071/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145000545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Aerobic Exercise on Physical Fitness in Obesity Using Fox vs. Tanaka's Maximum Heart Rate and Percentage vs. Karvonen Methods. 用Fox vs. Tanaka最大心率和百分比vs. Karvonen方法研究有氧运动对肥胖者身体健康的影响。

International journal of exercise science Pub Date : 2025-09-01 eCollection Date: 2025-01-01 DOI: 10.70252/XEPS8890

Maninthorn Rugbumrung, Tavarintorn Rukbumrung, Sittiwit Impanya, Adison Thurayot

{"title":"Effects of Aerobic Exercise on Physical Fitness in Obesity Using Fox vs. Tanaka's Maximum Heart Rate and Percentage vs. Karvonen Methods.","authors":"Maninthorn Rugbumrung, Tavarintorn Rukbumrung, Sittiwit Impanya, Adison Thurayot","doi":"10.70252/XEPS8890","DOIUrl":"10.70252/XEPS8890","url":null,"abstract":"The intensity of aerobic exercise is influenced by maximum heart rate (MHR), which can be assessed through an incremental exercise test. However, this method requires specialized equipment and a level of fitness that individuals who are sedentary or overweight may lack. Therefore, estimating MHR using formulas is essential. Various methods exist to calculate MHR, but their effectiveness in real exercise programs for obese individuals remains unclear. This study aimed to investigate the effects of aerobic exercise using different intensity calculation methods, specifically comparing Fox's and Tanaka's maximum heart rate (MHR) equations, as well as the Percentage and Karvonen methods for target heart rate (THR). Seventy-eight men aged 20 to 30 with a body fat percentage of over 20% were divided into one control group and four aerobic exercise groups. EG1 and EG3 used Fox's and Tanaka's equations for MHR and THR from the percentage, while EG2 and EG4 applied the Karvonen method for THR. Participants engaged in 45 minutes of moderate-intensity walking or running on a treadmill four days a week for 12 weeks. Body weight, body fat percentage, BMI, resting heart rate (RHR), and VO2 max were measured at baseline and after the intervention. After 12 weeks, all exercise groups demonstrated significant improvements in VO2 max, as well as reductions in body weight, body fat percentage, BMI, and resting heart rate (RHR), whereas the control group showed no changes. No significant differences were found among the exercise groups. Aerobic exercise at various intensities effectively enhances cardiovascular fitness and body composition in obese individuals, indicating that these methods are equally beneficial.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"18 8","pages":"695-711"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12408077/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145000532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Screen Time and Objectively Measured Sleep of U.S. College Students: A Brief Report. 美国大学生的屏幕时间和客观测量的睡眠：一个简短的报告。

International journal of exercise science Pub Date : 2025-09-01 eCollection Date: 2025-01-01 DOI: 10.70252/XDUT8341

Donya Sedaghat, Eunkyung Lee, Jeanette Garcia, Keith Brazendale

引用次数: 0

Comparison of Kinematic Outputs and Reliability of Plug-in Gait versus Conventional Gait Model 2 During Cycling. 插入式步态与传统步态模型2在循环过程中的运动输出和可靠性比较。

International journal of exercise science Pub Date : 2025-09-01 eCollection Date: 2025-01-01 DOI: 10.70252/DMWA1583

Erin McCallister, Nicholas Russell

{"title":"Comparison of Kinematic Outputs and Reliability of Plug-in Gait versus Conventional Gait Model 2 During Cycling.","authors":"Erin McCallister, Nicholas Russell","doi":"10.70252/DMWA1583","DOIUrl":"10.70252/DMWA1583","url":null,"abstract":"Motion analysis is used to measure proper bicycle fit, avoid injury, and improve cycling performance. Small changes in position can impact joint kinematics and risk for overuse injury. Concerns regarding the often-used biomechanical model Plug-in-Gait (PIG) resulted in the creation of Conventional Gait Model 2 (CGM2). This study aims to compare kinematic outputs of these two models for cycling biomechanics plus between-day reliability of each model. Thirty-five participants participated in two experimental sessions. PiG and CGM2 marker sets were applied, and data was collected while cycling between 80-90 rpm. Model outputs were compared using session one kinematic data. Reliability tests used session one and session two data. Differences in kinematics were found between models for hip flexion (CGM2 - PiG mean difference = -8.2° ± 5.2°, p < .001), hip frontal plane (mean = 5.4 ± 4.1°, p < .001), hip transverse plane (mean = -5.3° ± 11.6°, p = .011), knee extension (mean = 1.8° ± 4.2°, p = .015), knee frontal plane (mean = -10.8° ± 9.6°, p < .001), dorsiflexion (mean = -1.7° ± 3.6°, p = 0.005), and plantarflexion (mean = 3.3° ± 5.4°, p < 0.001). CGM2 ICCs were good-to-excellent (> 0.75) for all motions except frontal plane knee motion. PiG ICCs were > 0.75 only for ankle dorsiflexion and plantarflexion. If CGM2 is used to assess bicycle fit, reference values should be adjusted based on the difference between models to ensure an appropriate fit is obtained. CGM2 has better between-day reliability, therefore practitioners may consider using CGM2 for serial fit sessions.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"18 7","pages":"712-726"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12408084/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145000516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Validity and Reliability of the 'Feelfit®' Accelerometer in Evaluating Physical Activity and Sedentary Time in Children: A Comparative Study with Two Different Accelerometers. “Feelfit®”加速度计评估儿童身体活动和久坐时间的效度和信度：两种不同加速度计的比较研究。

International journal of exercise science Pub Date : 2025-09-01 eCollection Date: 2025-01-01 DOI: 10.70252/NOCK5583

Songdhasn Chinapong, Korntawat Klinchan, Hanif Abdul Rahman, Michael Chia, Waris Wongpipit, Jetsada Arnin, Areekul Amornsriwatanakul

{"title":"Validity and Reliability of the 'Feelfit®' Accelerometer in Evaluating Physical Activity and Sedentary Time in Children: A Comparative Study with Two Different Accelerometers.","authors":"Songdhasn Chinapong, Korntawat Klinchan, Hanif Abdul Rahman, Michael Chia, Waris Wongpipit, Jetsada Arnin, Areekul Amornsriwatanakul","doi":"10.70252/NOCK5583","DOIUrl":"10.70252/NOCK5583","url":null,"abstract":"Accurate physical activity (PA) measurement is crucial for public health surveillance. While self-report questionnaires are commonly used, they have limitations, especially in young children. An affordable and user-friendly device like Feelfit® offers a promising alternative particularly for countries with limited research resources. This study aimed to evaluate Feelfit®'s performance against the widely used ActiGraph® accelerometer in measuring PA among children. A quasi-experimental design was applied. Thirty-nine children (19 boys; 20 girls; aged 11.4 ± 0.5 years) wore both Feelfit® and ActiGraph® during sequentially specified activities of varying intensity ranging from sedentary to vigorous. Data were analysed using paired t-tests, Bland-Altman plots, and intra-class correlation coefficients (ICCs) to assess agreement, precision, and reliability. Feelfit® showed good agreement with ActiGraph® for moderate-to-vigorous PA (MVPA) but overestimated sedentary time and underestimated light PA. It demonstrated better precision for MVPA but low reliability for light PA. Intra-class correlation coefficients were moderate for MVPA (ICC = 0.43), but poor for sedentary time (ICC = 0.11). Feelfit® is a suitable option for measuring MVPA in children, offering acceptable validity and reliability compared to ActiGraph®. However, improvements are needed for accurate measure of sedentary and light activities. Despite these limitations, Feelfit®'s affordability and ease of use make it a valuable tool for use in small- to large-scale research and in resource-limited settings.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"18 2","pages":"794-810"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12408083/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145000557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0