The Diurnal Variation on Cardiovascular Endurance Performance of Secondary School Athlete Student

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Determinants of sport-specific postural control strategy and balance performance of amateur rugby players

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Post-exercise Cold Water Immersion On Sports Performance Recovery: A Review

Post-exercise cold water immersion (CWI) has recently been developed and applied in professional sports. CWI has become widely accepted for use in sports and is endorsed by various organisations, such as the American College of Sports Medicine (ACSM), the International Amateur Athletic Federation (IAAF), and the National Athletic Trainers’ Association (NATA). Specific considerations on the extensive use of CWI in the field of sports, the effects of performance recovery after CWI intervention are noteworthy to be examined. This article aimed to review and summarize reports studying effects of CWI on post-exercise recovery. A comprehensive examination of literature was conducted and the decided databases were reviewed. Positive effects of post-exercise CWI on athletes’ endurance performance and perceived recovery were found. The possible reasons relate to the reduction of core temperature and blood redistribution. However, CWI effects on power related performance did not receive a consensus understanding in this review. Cryotherapy is normally used for limiting muscle damages, but post-exercise CWI on alternating blood markers for the muscle damages did not show a clear finding in this review. Particularly, Jadad score analysis in this review shows low on average (average Jadad score = 1.80±1.17) of the quality of the studies. It is necessary to reconsider the application on the previous examination. Further investigation is recommended, specifically on power related recovery and neural transmission alternations using randomized controlled trial with masking design

Postural control profile of amateur rugby players

Session OP-PM25: Balance: no. 118INTRODUCTION: Injuries during rugby training or competitions might disrupt the sensory and motor systems that affect postural control. However, no study has explored the sensory organisation and reactive balance control of rugby players. This study compared (1) the sensory organisation of balance control and (2) reactive balance control, of amateur rugby players and active individuals. METHODS: Forty-one amateur rugby players (22 males and 19 females; mean age ± SD: 21.4 ± 2.1 years) and thirty-one young active individuals (22 males and 9 females; mean age ± SD: 20.6 ± 0.9 years) completed the measurements in the study. Their sensory organisation and bipedal standing balance performance were evaluated using a sensory organisation test (SOT), and their reactive balance performance was assessed using a motor control test (MCT). The major outcome measures were the SOT equilibrium scores (ES) and sensory ratios and the MCT motor response latencies. RESULTS: Rugby players had lower SOT ESs under different sensory environments (all P < 0.001) and prolonged reactive motor response times in the MCT (P < 0.001) compared to the active controls. The SOT vestibular and visual ratios were also lower in the rugby group (P = 0.005). However, no significant between-group difference was found in the somatosensory ratio (P = 0.853). DISCUSSION: Rugby players demonstrated inferior standing balance performance compared to their non-trained counterparts. They relied less heavily on vestibular and visual information to maintain standing balance under sensorial challenging environments. Additionally, they reacted more slowly to postural threat, reflecting their suboptimal reactive balance ability in upright standing

Associations of device-measured physical activity, sedentary behavior, and executive function in preadolescents: a latent profile approach

Purpose: This study investigated the associations between physical activity (PA), sedentary behavior (SB) and executive function (EF) in preadolescents. Methods: One hundred and twenty preadolescents were recruited from two Hong Kong primary schools. PA and SB were recorded for seven consecutive days by accelerometer. EF performance, including inhibition (Stroop task, ST; Flanker task, FT) and working memory (Sternberg Paradigm task, SPT) were measured. Body mass index (BMI) and cardiorespiratory fitness (CRF, multi-stage fitness test) were tested. Latent profile analysis explored the profiles of PA and SB in preadolescents. Results: Three distinct profiles were identified: Low Activity, Average Activity, and High Activity. Participants in Low Activity performed worse in the accuracy of ST (vs. Average Activity, P = 0.03; vs. High activity, P < 0.01), FT (vs. Average Activity, P = 0.02; vs. High activity, P < 0.001), and SPT (vs. Average Activity, P < 0.01; vs. High activity, P < 0.01). No significant difference was observed between participants with Average Activity and High Activity. No significant association was observed for profiles on BMI and CRF. Conclusion: Supplementing the consensus of the literature that moderate-to-vigorous physical activity benefits cognition, we conclude that light physical activity enhances preadolescents' executive functioning

Comparison between smartphone pedometer applications and traditional pedometers for improving physical activity and body mass index in community-dwelling older adults

[Purpose] The effectiveness of a smartphone pedometer application was compared with that of a traditional pedometer for improving the physical activity and weight status of community-dwelling older adults. [Subjects and Methods] This study had a nonequivalent pretest-posttest control group design. Ninety-seven older adults (mean age ± SD, 60.1 ± 5.5 years) joined the smartphone pedometer group and underwent a 2-week walking intervention based on a smartphone pedometer application. Fifty-four older adults (mean age ± SD, 65.3 ± 8.7 years) joined the traditional pedometer group and underwent a 2-week walking intervention based on a traditional pedometer. The participants’ physical activity was evaluated using the International Physical Activity Questionnaire– Short Form, and their weight status was quantified by calculating the body mass index. The daily pedometer count was also documented. [Results] No significant time, group, or time-by-group interaction effects were found for any of the outcome variables. However, trends of improvement in physical activity and body mass index were seen only in the smartphone pedometer group. [Conclusion] A smartphone pedometer application might be more favorable than a traditional pedometer in improving physical activity and body mass index in community-dwelling older adults. However, further experimental studies are necessary to confirm the results.Department of Rehabilitation Science

Effects of Ving Tsun Chinese martial art training on upper extremity muscle strength and eye-hand coordination in community-dwelling middle-aged and older adults : a pilot study

2016-2017 > Academic research: refereed > Publication in refereed journal201804_a bcmaVersion of RecordPublishe