International journal of exercise science最新文献_第5页

Perceptions of Peer and Parental Support: Feasibility of a Physical Activity Intervention for Adolescent Girls. 同伴和父母支持的感知：青春期女孩体育活动干预的可行性。

International journal of exercise science Pub Date : 2024-12-01 eCollection Date: 2024-01-01 DOI: 10.70252/QRWR8465

Avery G Douglas, Johanna M Hoch, Deirdre Dlugonski

{"title":"Perceptions of Peer and Parental Support: Feasibility of a Physical Activity Intervention for Adolescent Girls.","authors":"Avery G Douglas, Johanna M Hoch, Deirdre Dlugonski","doi":"10.70252/QRWR8465","DOIUrl":"10.70252/QRWR8465","url":null,"abstract":"Physical activity (PA) has a wide range of health benefits. Children with high levels of social support are more likely to achieve adequate levels of PA. The purposes of this pilot study were to examine the impact of an after-school intervention on perceived peer and parental support among adolescent girls and to identify correlates of support to explore in future studies to increase PA. Seventeen low-active girls in 6th-7th grade were recruited from a local middle school to participate in an 8- week intervention where they were exposed to various types of PA and discussed PA topics with their peers and college-aged mentors. Peer and parental support, self-reported physical activity, moderate-to-vigorous physical activity, and physical literacy self-evaluation were measured before and after the 8-week intervention. Paired samples t-tests indicated that parental support increased from pre- to post-intervention (t = 4.4, p < .001, d = 1.2, 95% CI = 1.7, 5.18), whereas there was a small, non-statistically significant increase in peer support (t = 1.5, p = 0.15, d = .4, 95% C I = -.89, 5.04). Correlations for the variables at pre-intervention indicated that there were significant correlations between peer and parental support (r = 0.74, p = 0.004), whereas at post-intervention there were significant correlations between peer and parental support (r = 0.83, p < .001), and physical literacy with peer support (r = 0.70, p = 0.008) and parental support (r = 0.69, p = 0.009). These preliminary results suggest that a PA intervention may increase perceptions of parent support and that physical literacy may be a variable to target in future interventions to address PA in this population.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"17 5","pages":"1352-1360"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11728580/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142978509","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

Assessment of the Accuracy of a Deep Learning Algorithm- and Video-based Motion Capture System in Estimating Snatch Kinematics. 深度学习算法和基于视频的动作捕捉系统在抓举运动学估计中的准确性评估。

International journal of exercise science Pub Date : 2024-12-01 eCollection Date: 2024-01-01 DOI: 10.70252/PRVV4165

Federico Thiele, Florian Paternoster, Chris Hummel, Fabian Stöcker, Denis Holzer

{"title":"Assessment of the Accuracy of a Deep Learning Algorithm- and Video-based Motion Capture System in Estimating Snatch Kinematics.","authors":"Federico Thiele, Florian Paternoster, Chris Hummel, Fabian Stöcker, Denis Holzer","doi":"10.70252/PRVV4165","DOIUrl":"10.70252/PRVV4165","url":null,"abstract":"In weightlifting, quantitative kinematic analysis is essential for evaluating snatch performance. While marker-based (MB) approaches are commonly used, they are impractical for training or competitions. Markerless video-based (VB) systems utilizing deep learning-based pose estimation algorithms could address this issue. This study assessed the comparability and applicability of VB systems in obtaining snatch kinematics by comparing the outcomes to an MB reference system. 21 weightlifters (15 Male, 6 Female) performed 2-3 snatches at 65%, 75%, and 80% of their one-repetition maximum. Snatch kinematics were analyzed using an MB (Vicon Nexus) and VB (Contemplas along with Theia3D) system. Analysis of 131 trials revealed that corresponding lower limb joint center positions of the systems on average differed by 4.7 ± 1.2 cm, and upper limb joint centers by 5.7 ± 1.5 cm. VB and MB lower limb joint angles showed highest agreement in the frontal plane (root mean square difference (RMSD): 11.2 ± 5.9°), followed by the sagittal plane (RMSD: 13.6 ± 4.7°). Statistical Parametric Mapping analysis revealed significant differences throughout most of the movement for all degrees of freedom. Maximum extension angles and velocities during the second pull displayed significant differences (p < .05) for the lower limbs. Our data showed significant differences in estimated kinematics between both systems, indicating a lack of comparability. These differences are likely due to differing models and assumptions, rather than measurement accuracy. However, given the rapid advancements of neural network-based approaches, it holds promise to become a suitable alternative to MB systems in weightlifting analysis.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"17 1","pages":"1629-1647"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11728585/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142978584","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

Comparison of Lower Limb Mass, Thigh Circumference, and Balance Ability after Anterior Cruciate Ligament Reconstruction and in Control Participants. 前交叉韧带重建后与对照组的下肢质量、大腿围度和平衡能力的比较。

International journal of exercise science Pub Date : 2024-12-01 eCollection Date: 2024-01-01 DOI: 10.70252/ONAL9517

Micah B Hébert, Laura L Dill, Paul T Stuhr, Deanna J Schmidt

{"title":"Comparison of Lower Limb Mass, Thigh Circumference, and Balance Ability after Anterior Cruciate Ligament Reconstruction and in Control Participants.","authors":"Micah B Hébert, Laura L Dill, Paul T Stuhr, Deanna J Schmidt","doi":"10.70252/ONAL9517","DOIUrl":"10.70252/ONAL9517","url":null,"abstract":"Injury of the anterior cruciate ligament (ACL) in the knee is common, with up to 250,000 cases annually in the United States. Such injuries can lead to muscle atrophy, impaired balance, and limited movement. This study aimed to compare the lower limbs of individuals with ACL reconstruction to a Control group. We hypothesized that ACL participants would exhibit greater asymmetry between lower limbs as compared to Controls. Data were collected from 12 ACL participants and 30 Control participants. Measurements included lower limb muscle mass assessed using bioelectrical impedance, thigh circumference at 10 cm and 15 cm superior to the patella, and postural sway during single-leg stance. The results showed no significant difference in mass between the surgical and non-surgical lower limbs of ACL participants. Additionally, no significant differences were found in thigh circumference, or postural sway for ACL participants between the two limbs. In contrast, the Control group demonstrated significantly greater muscle mass (p = 0.005) in the dominant lower limbs compared to the non-dominant limbs. Thigh circumference at the 10 cm mark was also significantly greater on the dominant lower limbs than non-dominant lower limbs (p = 0.040). Our hypotheses were not supported, as asymmetry in mass and thigh circumference was demonstrated in Control but not ACL participants. No differences in postural sway were found between lower limbs in either ACL or Control participants. Loss of the ability to rely on the strength of a dominant lower limb may lead to functional deficits when participants undergo dominant limb ACL reconstruction.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"17 1","pages":"1306-1317"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11728579/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142978585","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

The Interaction of Treadmill Type and Incline Slope on Biomechanics and Muscle Activation During Human Locomotion. 跑步机类型和坡度对人体运动过程中生物力学和肌肉活动的影响。

International journal of exercise science Pub Date : 2024-12-01 eCollection Date: 2024-01-01 DOI: 10.70252/GMWV8349

Rohit Kundu, Taj Krieger, Ricardo Sanchez, D E Lankford

{"title":"The Interaction of Treadmill Type and Incline Slope on Biomechanics and Muscle Activation During Human Locomotion.","authors":"Rohit Kundu, Taj Krieger, Ricardo Sanchez, D E Lankford","doi":"10.70252/GMWV8349","DOIUrl":"10.70252/GMWV8349","url":null,"abstract":"To investigate the effects of differing treadmills on impact acceleration and muscle activation.Methods: 15 males and 7 females (27.8 ± 7.7yrs), engaged in two sessions of high-incline walking (HIW), and low-incline jogging (LIJ) on different deck systems (cushioned) treadmills (TM1 and TM2). Sessions lasted 5-minutes, and participants maintained a self-selected pace matched for each session. EMG markers were placed over the Tibialis Anterior (TA), Soleus (SOL), Lateral Gastrocnemius (LG), Biceps Femoris (BF), Gluteus Maximus (GM), Anterior Deltoid (AD), Vastus Lateralis (VL), and the Erector Spinae (ES). Trident Inertial Measurement Units (IMU) were attached to the foot and sacrum. EMG activity, impact accelerations, heart rate, and RPE were collected at the 4-minute 30-seconds mark.Results: Peak EMG was higher for LG (p = 0.005), SOL (p = 0.010), and BF (p < 0.001) on TM1 compared to TM2, while AD exhibited lower peak activation during HIW compared to LIJ on TM2 (p = 0.010). The integral EMG activity increased for AD, ES, VL, SOL, LG, and GM only during HIW for both TM1 and TM2. However, only integral EMG activation of BF and LG differed between TM1 and TM2 during HIW. Foot and sacrum resultant acceleration was notably lower during HIW compared to LIJ on both TM1 and TM2. HR was significantly higher on TM1 (171.2 ± 24.8bpm) compared to TM2 (164.62 ± 23.7 bpm, p < .05) during HIW (p < .001), and RPE also differed between TM1 (13.96 ± 1.96) and TM2 (13.09 ± 1.97) during HIW (p < .05).Conclusion: At the same speed (correspond to an RPE of 11) and grade, treadmill design may impact peak and integral muscle EMG patterns, RPE, and HR responses.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"17 1","pages":"1478-1492"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11728598/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142978594","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 a Linear Position Transducer to Measure Barbell Velocity, Duration, and Displacement During the Bench Press. 测量卧推过程中杠铃速度、持续时间和位移的线性位置传感器的有效性和可靠性。

International journal of exercise science Pub Date : 2024-12-01 eCollection Date: 2024-01-01 DOI: 10.70252/MFJK8861

Anthony G Pinzone, Ryan W Gant, Jennifer Rivera, Edward Z Pelka, Emily C Tagesen, Modesto A Lebron, Adam R Jajtner

{"title":"Validity and Reliability of a Linear Position Transducer to Measure Barbell Velocity, Duration, and Displacement During the Bench Press.","authors":"Anthony G Pinzone, Ryan W Gant, Jennifer Rivera, Edward Z Pelka, Emily C Tagesen, Modesto A Lebron, Adam R Jajtner","doi":"10.70252/MFJK8861","DOIUrl":"10.70252/MFJK8861","url":null,"abstract":"This investigation evaluated validity and reliability of the HUMAC360 linear position transducer (LPT) compared to the Tendo Sport Weightlifting Analyzer (TENDO) for measuring mean velocity (MV), peak velocity (PV), and displacement (D) during the bench press. Seventeen recreationally active individuals completed three visits. During visit one, participants were assessed for their one repetition maximum (1RM) bench press. During subsequent visits, participants completed two sets of three repetitions of bench press at 30, 50, 60, and 70% 1RM. The HUMAC and TENDO measured MV, PV, and D simultaneously, while the HUMAC also measured repetition duration (T). Validity of the HUMAC and inter-set and inter-day reliability for MV, PV, D, and T were assessed using Intraclass Correlation Coefficients (ICCs). The HUMAC demonstrated limited validity when compared to the TENDO as ICCs ranged from poor to good across all measurements. Significant differences were observed between devices for MV, PV, and D at all intensities (p < 0.001). Inter-set reliability was excellent for all intensities and measurements, but inter-day reliability was impaired for MV, PV, and D at higher intensities. Validity of the HUMAC for measuring MV, PV, and D is limited when compared to TENDO. As the HUMAC reliably assesses MV, PV, D, and T, both inter-set and interday (up to 60% 1RM), it may serve as an autoregulatory tool for velocity-based training.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"17 7","pages":"1294-1305"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11728576/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142978428","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

Acute Effects of Serial and Integrated Concurrent Exercise on Circulating microRNAs -126 and -222 in Sedentary Adults. 连续和综合同步运动对久坐成人循环microrna -126和-222的急性影响

International journal of exercise science Pub Date : 2024-12-01 eCollection Date: 2024-01-01 DOI: 10.70252/XFJK8005

Matthew F Brisebois, Ryan A Gordon, Emily L Zumbro, Matthew L Sokoloski, Anthony A Duplanty, Shanil Juma, Brandon R Rigby

{"title":"Acute Effects of Serial and Integrated Concurrent Exercise on Circulating microRNAs -126 and -222 in Sedentary Adults.","authors":"Matthew F Brisebois, Ryan A Gordon, Emily L Zumbro, Matthew L Sokoloski, Anthony A Duplanty, Shanil Juma, Brandon R Rigby","doi":"10.70252/XFJK8005","DOIUrl":"10.70252/XFJK8005","url":null,"abstract":"The purpose of this study was to compare changes in circulating microRNAs -126 (c-miR-126) and -222 (c-miR-222) following acute serial concurrent exercise (SCE) and integrated concurrent exercise (ICE) sessions among young, sedentary adults. Ten males and 9 females completed the study procedures. For SCE, participants performed resistance exercise (RE) followed by aerobic exercise (AE), without mixing the two. For ICE, participants performed a brief bout of AE before each set of RE. Blood was collected before, immediately after (IP), and 1 h (1HR) after each exercise session. Expression of c-miR-126 significantly increased from baseline at IP (1.6-fold SCE, 2.1-fold ICE; p = .037) and 1HR (1.8-fold SCE, 1.7-fold ICE; p = .034) following both sessions, with no difference between the two sessions. Expression of c-miR-222 significantly increased from baseline at IP (1.7-fold SCE, 1.9-fold ICE; p = .024) and 1HR (2.0-fold SCE, 1.6-fold ICE; p = .038) following both sessions, with no difference between the two sessions. There were no differences in peak heart rate or average heart rate between the two workout sessions. Both SCE and ICE patterns appear equally effective at acutely increasing c-miR-126 and -222.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"17 2","pages":"1444-1460"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11728573/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142978600","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

Fluid Intake and Hydration Responses to Mass Participation Gravel Cycling. 大量参与砾石自行车运动的液体摄入和水化反应。

International journal of exercise science Pub Date : 2024-12-01 eCollection Date: 2024-01-01 DOI: 10.70252/IWVS1647

Carly Schuerger, Brandon Raik, Francis Salmon, Kian Foote, Angelo Madlambayan, Maya Vega, Grace Handler, Matthew M Schubert

{"title":"Fluid Intake and Hydration Responses to Mass Participation Gravel Cycling.","authors":"Carly Schuerger, Brandon Raik, Francis Salmon, Kian Foote, Angelo Madlambayan, Maya Vega, Grace Handler, Matthew M Schubert","doi":"10.70252/IWVS1647","DOIUrl":"10.70252/IWVS1647","url":null,"abstract":"Gravel cycling is a relatively new cycling discipline, with the Union Cycliste Internationale (UCI) hosting their first World Championships in 2022. Gravel races combine features of road racing, cyclocross, and mountain biking, including terrain of varying technical difficulty, long distances, substantial elevation gain, obstacles, and limited opportunities to stop for in-race nutrition. This study assessed hydration responses to gravel races of three different distances. Data were collected on saliva osmolarity (SOsm), body mass (BM), fluid intake, and nutrition knowledge at a gravel cycling race in April 2023. A total of 121 participants completed pre-race surveys, 53 provided pre-race measures of BM and SOsm, and 38 participants completed post-race testing. Only 22.6% (n = 12) of participants were hydrated before the race, with 56.6% mildly dehydrated (n = 30), 18.9% moderately dehydrated (n = 10), and 1.9% severely dehydrated (n = 1). Post-race, 15% (n=6) were still hydrated, 20% (n = 8) were mildly dehydrated, 47.5% (n = 19) were moderately dehydrated, and 17.5% (n = 7) were severely dehydrated. Analyses revealed significant decreases in BM and increases in SOsm from pre- to post-exercise in the two longer race distances (p < 0.05). There was a significant effect of race distance on energy, fluid, carbohydrate, and sodium intake (p < 0.05). Sweat rates were not different (p > 0.05). Our results revealed an effect of race distance on BM losses, SOsm, and energy, fluid, carbohydrate, and sodium intakes. Future studies could inform optimal feeding and hydration strategies.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"17 2","pages":"1648-1662"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11728578/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142978526","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

Heart Rate and Blood Pressure Responses Vary Between Blood Flow Restriction Cuff Type. 心率和血压反应不同的血流量限制袖带类型。

International journal of exercise science Pub Date : 2024-12-01 eCollection Date: 2024-01-01 DOI: 10.70252/MQOB1046

Daniela Rincon-Garcia, Abbey C Hafler, Rebecca F Rodriguez, Erica M Marshall

{"title":"Heart Rate and Blood Pressure Responses Vary Between Blood Flow Restriction Cuff Type.","authors":"Daniela Rincon-Garcia, Abbey C Hafler, Rebecca F Rodriguez, Erica M Marshall","doi":"10.70252/MQOB1046","DOIUrl":"10.70252/MQOB1046","url":null,"abstract":"The purpose of the study was to compare heart rate (HR), systolic blood pressure (SBP), and diastolic blood pressure (DBP) following high load resistance exercise (HLRE) and blood flow restriction exercise (BFRE) with a knee wrap (kBFRE) and pneumatic cuff (pBFRE). Eleven men (N = 9) and women (N = 2) participated. HR, SBP, and DBP were collected at Rest, immediately post exercise (IP), 10-, 30-, and 45-minutes post exercise. Repeated measures ANOVAs assessed the effects of condition across time on all variables. Significant effects were examined with pairwise comparisons and a Sidak correction. Significance was defined a priori p ≤ 0.05. There were significant condition by time interactions for HR (p = 0.005; ES = 0.31), SBP (p = 0.016; ES = 0.27), and DBP (p = 0.03; ES = 0.24). There were significant main effects of time for HR (p < 0.001; ES = 0.78), SBP (p < 0.001; ES = 0.84), and DBP (p = 0.004; ES = 0.44). The HR was increased from Rest for up to 45 minutes across all conditions. IP, the HR was lower following pBFRE compared to HLRE. There was an increase in SBP at IP. SBP was higher following HLRE compared to kBFRE and pBFRE. DBP was decreased at 10 minutes across all conditions, with kBFRE prompting larger reductions compared to HLRE at 10 minutes. DBP was lower following kBFRE compared to pBFRE at 45 minutes. This study suggests that BFRE alters cardiovascular function differently than HLRE, but is dependent on cuff type. Specifically, pneumatic cuffs may attenuate the increase in the HR and SBP response, and knee wraps augment the reduction in DBP.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"17 2","pages":"1568-1576"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11728587/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142978528","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

The Effects of High-Intensity Functional Training on the Perceptions of Exercise in Middle-Aged Females: A Pilot Study. 高强度功能性训练对中年女性运动知觉的影响：一项初步研究。

International journal of exercise science Pub Date : 2024-12-01 eCollection Date: 2024-01-01 DOI: 10.70252/WZKJ6406

Halle N Brin, Baylie G Sigmund, Nathan D Dicks, Kathryn J Deshaw, Tanis J Walch, Michael J Carper, Allison M Barry

{"title":"The Effects of High-Intensity Functional Training on the Perceptions of Exercise in Middle-Aged Females: A Pilot Study.","authors":"Halle N Brin, Baylie G Sigmund, Nathan D Dicks, Kathryn J Deshaw, Tanis J Walch, Michael J Carper, Allison M Barry","doi":"10.70252/WZKJ6406","DOIUrl":"10.70252/WZKJ6406","url":null,"abstract":"The high prevalence of obesity and physical inactivity in the U.S. is a public health crisis. This study aims to examine the effects of high-intensity functional training (HIFT) on exercise perceptions and physiological changes in inactive females. A pre-test and post-test, quasi-experimental design was conducted with inactive, middle-aged females (n = 8) participating in an 8-week supervised and verified intervention (2-week High-Intensity Interval Training, 6-weeks HIFT). The Health Belief Model Scale for Exercise (HBMS-E) survey was completed pre-intervention, post-intervention, and 4-week follow-up to assess exercise perceptions. Pre- and post-intervention physiological assessments included: body composition, strength (1-repetition maximum (RM) bench press (BP), 5-RM deadlift (DL), and maximal oxygen consumption (V̇O2max). A within-subjects repeated-measures ANOVA assessed the HBM constructs between pre-intervention, post-intervention, and follow-up. Dependent t-tests compared physiological outcomes pre- to post-intervention. There was a significant decrease between pre-intervention, post-intervention, and follow-up for objective (F(2, 14)=22.24, p < .001) and subjective barriers (F(2, 14) = 11.20, p = .001), and a significant increase in self-efficacy (F(1.08, 7.53)= 8.96, p = .02). There was a significant increase in V̇O2max (p = .001, d = 1.81), 1-RM BP (p < .001, d = 2.51), and 5-RM DL (p = .001, d = 1.83) pre- to post-intervention. Findings suggest HIFT positively influenced middle-aged females' perceptions of barriers and self-efficacy related to exercise and provides fitness benefits to improve health and wellness.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"17 5","pages":"1392-1405"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11728574/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142978602","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

Effectiveness of a Fast- vs. Slow-Velocity Training on Load-Velocity Characteristics in Older Adults: A Pilot Study. 快速与慢速训练对老年人负荷-速度特征的有效性：一项初步研究。

International journal of exercise science Pub Date : 2024-12-01 eCollection Date: 2024-01-01 DOI: 10.70252/GZEM3629

Blake Murphy, Kelley G Hammond, Leland Barker, Mae Grahek, Mikayla Grocki, Jacob Siedlik, Mitchel A Magrini

{"title":"Effectiveness of a Fast- vs. Slow-Velocity Training on Load-Velocity Characteristics in Older Adults: A Pilot Study.","authors":"Blake Murphy, Kelley G Hammond, Leland Barker, Mae Grahek, Mikayla Grocki, Jacob Siedlik, Mitchel A Magrini","doi":"10.70252/GZEM3629","DOIUrl":"10.70252/GZEM3629","url":null,"abstract":"Resistance training at fast velocities is suggested to be more effective for improving muscular strength and movement speed compared to slow, heavy training. This study aimed to examine the effects of a fast-velocity (FVRT) compared to a slow-velocity (SVRT) resistance training program on maximal strength, maximal movement speed, and load-velocity characteristics in older adults. Nineteen community-dwelling older adults were randomly assigned to either the FVRT or SVRT group and completed a twice weekly, progressive resistance training protocol for 8-weeks. Both groups were instructed to move the weight \"as fast as possible\" during the concentric phase of the movement and received movement velocity biofeedback. Absolute (1RMABS) and relative (1RMREL) strength, maximal movement speed (MMS), load velocity slope (LVSLOPE) and the area under the LVSLOPE (LVAREA) were measured during a 1RM assessment at baseline (PRE), after 4-weeks (MID), and after 8-weeks (POST) of training. No differences were observed in average total volume between groups (FVRT: 47490.3±10888.3 kg/session; SVRT: 44679.3±15250.9 kg/session, p = 0.26, g = 0.60). Both groups improved absolute and relative strength and maximal movement speed. There were no interaction or main effects of LVSLOPE for time. However, there was a main effect of LVAREA for time. Both MID and POST LVAREA were larger than PRE (MID posterior meandiff: 0.24, 95% CI: 0.13-0.35; POST posterior meandiff: 0.39, 95% CI: 0.27-0.49). These findings suggest both FVRT and SVRT can lead to improvements in strength and movement speed in older adults. The lack of significant changes in LVSLOPE indicates that maximal strength and movement speed better reflect performance improvements in older adults than LVSLOPE.","PeriodicalId":14171,"journal":{"name":"International journal of exercise science","volume":"17 7","pages":"1416-1428"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11728570/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142978422","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}

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