Purpose: Adequate physical fitness is a key requirement for elite footballers. Maximal fitness tests are the standard for evaluating fitness but are often fatiguing and time consuming. This study investigated the ability of various minimally invasive protocols to reflect changes in standard parameters of football players’ physical fitness. Methods: Twenty-one elite junior footballers performed 2 standard fitness tests (stepwise incremental treadmill test with blood-lactate and heart-rate [HR] measurements and Yo-Yo Intermittent Recovery 1 test) and various proxy fitness evaluations (submaximal runs with measurement of exercise HR and HR recovery and external-to-internal load ratios with data collected during match play) 3 times over the course of 19 weeks. Changes in the standard parameters were compared with changes in proxy parameters. Results: Changes in maximal endurance performance showed small to moderate associations with HR-based proxy parameters (r = −.1 to −.46; P = .004–.56), whereas changes in the running velocity at anaerobic threshold had trivial to moderate associations (r = −.07 to −.39; P = .01–.67). Alterations in HR recovery following 2 short, submaximal runs were very largely correlated with changes in the running velocity corresponding to an HR of 170 beats·min−1 (r = −.74 and r = –.75; P < .001). Changes in external-to-internal load ratios derived from match play were not significantly correlated with changes in any of the standard parameters (r = −.03 to .31; P > .05). Conclusions: Parameters of maximal running performance and parameters describing physiological thresholds do not seem to be adequately captured by different minimally invasive protocols. In contrast, HR recovery following short, submaximal runs may be a valid tool to monitor changes in aerobic endurance adaptations.
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Sensitivity of Minimally Invasive Protocols to Monitor Changes in Endurance Performance in Elite Junior Football (Soccer) Players
Jan Schimpchen, Paulo F. Correia, and Tim Meyer
Effects of Stroboscopic Goggles on Standing Balance in the Spatiotemporal and Frequency Domains: An Exploratory Study
Madeleine E. McCreary, Chloe M. Lapish, Nora M. Lewis, Ryland D. Swearinger, Daniel P. Ferris, and Erika M. Pliner
Balance training paradigms have been shown to effectively reduce fall risk. Visual feedback is an important sensory mechanism for regulating postural control, promoting visual perturbations for balance training paradigms. Stroboscopic goggles, which oscillate from transparent to opaque, are a form of visual perturbation, but their effect on standing balance has not been assessed. In this study, 29 participants stood in bilateral and tandem stances as the center of pressure was recorded for 6 consecutive minutes wherein there were no stroboscopic perturbations in the first and last minutes. Spatial–temporal, frequency domain, and nonlinear standing balance parameters were calculated for each period. More differences in spatial–temporal parameters due to the strobe were found in the medial–lateral direction than the anterior–posterior direction. More differences in frequency domain parameters were observed in the anterior–posterior direction than the medial–lateral direction, but this did not occur for each variable. The nonlinear parameters were strongly affected by the strobe. Stroboscopic perturbations did not affect the bilateral and tandem stances equally. Spatial–temporal parameters for the tandem stance were greater in magnitude during the strobe period than the no strobe periods. This effect was not seen with the bilateral stance. This indicates that the efficacy of stroboscopic perturbations for challenging standing balance depends on task difficulty. Balance training paradigms that utilize stroboscopic perturbations will need to harmonize these perturbations with task difficulty.
Standing Still or Standing Out: Distinguishing Passive and Active Standing Is a Step in the Right Direction
Madeline E. Shivgulam, Emily E. MacDonald, Jocelyn Waghorn, and Myles W. O’Brien
Standing is a solution to reduce or break-up sedentary time (sitting/reclining/lying while awake); however, the measurable health benefits of standing are conflicting. A recent article in the Journal for the Measurement of Physical Behaviour has demonstrated that the thigh-worn activPAL inclinometer can distinguish between passive (no movement) and active (structured micromovements) standing using a machine learning model in lab-based and free-living environments. The predictive model extends beyond previous research by considering three-dimensional aspects of movement into the decision tree model. The ability to characterize these distinct postures is increasingly important to understand the physiological difference between passive and active standing. Notably, active standing, when stepping is not feasible, may be superior to passive standing for improving metabolic activity, reducing fatigue, and enhancing blood flow. Applied to free-living settings, active standing could help mitigate or attenuate some adverse cardiometabolic effects of stationary activity, thereby yielding positive cardiovascular outcomes. As standing gains recognition as a potentially important health behavior, distinguishing between passive and active standing offers a unique opportunity to clarify the health impacts of standing time, contributing to the evidence base. This evidence may contribute to more detailed activity guidelines and support public health initiatives to promote active standing. These advancements have the potential to enhance our understanding of standing behaviors’ health impacts and the possible divergent physiological effects of active versus passive standing.
Comparing the Effects of Aqua- and Land-Based Active Cooldown Exercises on Muscle Soreness and Sport Performance: A Randomized Crossover Study
Edwin Chun-Yip Chin, Steve Chung-Nam Lai, Sau-Fung Tsang, Sam Ho-Ngai Chung, Yik-Long Wong, Navjot Sran, Kwok-Keung Fung, and Fenghua Sun
Objective: Limited research has directly compared the effectiveness of aqua- and land-based exercises for postexercise recovery. This study aimed to fill this gap by comparing the effects of these 2 types of exercises on postexercise recovery. Methods: Sixteen male college athletes participated in an 8-day experimental study. The initial 2 days were dedicated to determining the intensity levels for the muscle-damaging exercise and recovery jogging. In a crossover design, participants underwent 2 sets of experimental trials. They were randomly assigned to either an aqua or land recovery intervention for days 3 to 5, and after a 1-week washout period they switched to the opposite intervention for days 6 to 8. Muscle soreness, creatine kinase, anaerobic performance, countermovement-jump height, and flexibility were assessed at different time points: baseline, immediately after downhill running, within 1 hour after jogging, and 24 hours and 48 hours after aqua or land jogging. Results: Significant group × time interaction effects were detected in the perceived soreness of the hamstring and quadriceps. However, the post hoc analysis showed no significant difference between aqua and land jogging groups. No significant group × time interaction effect was observed in creatine kinase, anaerobic performance, countermovement-jump height, or flexibility. Conclusion: Aqua and land jogging have similar recovery effects on muscle soreness and performance-based parameters.
The Effect of the Mamanet Cachibol League on Psychosomatic Symptoms, Healthy Eating, and Social Support Among Arab Women: A Mixed-Methods Study
Karin Eines, Inbal Halevi Hochwald, Gizell Green, Avivit Dolev, Shiran Bord, Yuval Paldi, Liora Shmueli, Sharon Levi, and Riki Tesler
Background: The Mamanet Cachibol League (MCL), a community-based model developed in Israel, promotes physical activity and amateur team sports among women. Women in the Arab society have traditionally played few sports, especially team sports. Aims: The study aimed to assess the differences in health indicators and well-being, including psychosomatic symptoms, self-reported health, healthy eating habits, and social support, by comparing Arab women MCL participants and nonparticipants and examines benefits and motivations of community-based team sports for participants. Methods: An explanatory sequential mixed-methods approach included a cross-sectional study with intervention and control groups of Israeli Arab women aged 25–59 years. Two-way analyses of covariance and multiple regression models evaluated demographics, well-being, healthy eating, and social support. Quality in-depth interviews with 30 MCL participants further explained the quantitative findings. Results : MCL participants reported higher self-assessed health (P < .001) and decreased psychosomatic symptoms (P < .001) than nonparticipants. Healthier eating and well-being were also linked to MCL participation. The women sense of belonging improved social interactions, personal and professional happiness, and group dedication. MCL attendees felt empowered because the group advocated equality and valued women. Women said their involvement helped their families. Conclusions: Findings on the MCL community-based model suggest that team sports may serve as an effective tool for promoting health and well-being of Arab women and foster positive community relationships. The sense of belonging and personal empowerment derived from being part of a sports team may also contribute to positive mental health outcomes.
Physical Activity and Motor Skills in Parent–Child Dyads: Associations With Indoor and Outdoor Home Space
Stephanie A. Palmer, Katherine Q. Scott-Andrews, Nancy G. Ramirez, Alec McKheen, and Leah E. Robinson
Indoor and outdoor home space may support physical activity (PA) and enhance motor skills (MS). However, there is limited knowledge about how indoor and outdoor home space affect PA and MS parent–child dyads. This cross-sectional study examined whether indoor and outdoor home spaces affect PA and MS in children and their parents. MS was measured with the Test of Gross Motor Development-3, and moderate to vigorous PA (MVPA) was assessed using accelerometry in 43 and 48 parent–child dyads, respectively. Indoor and outdoor home spaces were self-reported through an online questionnaire. Multiple regression models were fit to determine the relationship between indoor and outdoor home space and MS and MVPA in children and parents separately. Controlling for theory-based covariates, outdoor home space was positively associated with children’s MVPA (p < .05) and parents’ MS (p < .05) but negatively associated with parents’ MVPA (p < .05). Indoor home space was negatively associated with parents’ MS (p < .05). No other significant findings emerged. Findings suggest indoor and outdoor home spaces may play unique roles in supporting PA and MS among parent–child dyads and should be investigated in more rigorous studies.
Physical Activity as a Victim, a Perpetrator, or Part of the Solution to the Climate Crisis?
Peter Gelius, Sven Messing, Antonina Tcymbal, Leonie Birkholz, and Karim Abu-Omar
Humanity is facing a polycrisis, including climate change, loss of biodiversity, and economic inequalities. This commentary examines the role of physical activity (PA) research in the context of climate change, highlighting 3 perspectives: PA as a victim, as a perpetrator, and as part of the solution. The first perspective conceptualizes PA as a victim of climate change, as heat waves, extreme weather events, and high ozone levels pose a threat to health-enhancing PA and sports; adaptation strategies are needed and potentially lifesaving. The second perspective describes PA as a perpetrator to climate change due to the significant carbon footprint of some forms of PA and sport. The third perspective focuses on PA as a solution to climate change, as some forms of PA—such as active transport and urban gardening—have both individual and planetary health benefits. In addition, PA provides health benefits in extreme situations by reducing stress and maintaining health in times of crisis. Each of these 3 perspectives can guide future research in the field of PA and health.
Science Communication in Kinesiology: Examples for Engaging Students
Steven J. Elmer
Scientists have a responsibility to engage with and inform the public about new challenges and discoveries that impact the health of society. However, most scientists do not have formal training in how to communicate scientific information to nonscientists. In this paper, I describe how the Department of Kinesiology and Integrative Physiology at Michigan Technological University incorporated science communication into its undergraduate and graduate curriculum. I also discuss the impact, benefits, and lessons learned from this initiative. My hope is that this paper will inspire other kinesiology programs to provide distinct opportunities for their students to develop science communication skills so that they can better connect with the public and world around them.
Social Justice in Practice—Integrating Ethical Leadership, Inclusive Excellence, and Community Engagement in the Undergraduate Kinesiology Curriculum
Jeffrey Cherubini
Creating opportunities for undergraduate students’ personal and professional development including advocacy for social justice is a relevant topic for kinesiology faculty and administrators. Utilizing a multidisciplinary approach to promote self-awareness, behavior change, and social justice in kinesiology, the purpose of this article is to share and discuss high-impact practices and strategies to infuse ethical leadership, inclusive excellence, and community engagement within the kinesiology curriculum. Principles from kinesiology, public health, sport psychology, leadership studies, pedagogy, and human resources are integrated to help kinesiology faculty facilitate and enhance students’ future professional practices. Frameworks for behavior change for social justice in kinesiology include the decolonizing kinesiology ethics, inclusive excellence, stages of change, and effective communication. Readers are encouraged to “take back to their departments” practices and strategies that can be further modified and integrated into their own kinesiology curriculum.
Sport Participation Trajectories and Loneliness: Evidence From the Longitudinal Study of Australian Children
Katherine B. Owen, Karine E. Manera, Philip J. Clare, Michelle H. Lim, Ben J. Smith, Philayrath Phongsavan, David R. Lubans, Pamela Qualter, Rochelle Eime, and Ding Ding
Background: This study aimed to identify patterns of overall, team, and individual sport participation and examine the prospective associations between these patterns and loneliness in young people. Methods: We analyzed data from 4241 young people, from waves 3 (8–9 y) to 9 (20–21 y) of the Longitudinal Study of Australian Children. We conducted latent class analyses to identify overall and team versus individual sport participation trajectories and used adjusted log-Poisson regression models to examine the associations between these trajectories and loneliness at wave 9. Results: Latent class analyses identified 4 distinct overall sport participation classes which were labeled: nonparticipants (24%), dropouts (42%), initiators (7%), and consistent participants (27%). Compared with nonparticipants, consistent participants had a lower risk of loneliness (risk ratios = 0.69; 95% CIs, 0.59–0.81). Latent class analyses also identified 4 distinct team versus individual sport participation classes: team and individual sport nonparticipants (38%), individual sport participants (14%), moderate team sport participants (14%), and high team sport participants (34%). Compared with the team and individual sport nonparticipants, the high team sports participants had a lower risk of loneliness (risk ratios = 0.70; 95% CIs, 0.53–0.92). Conclusions: Young people who continued participating in sport in general, and particularly in team sport, had a reduced risk of loneliness. Continued participation in sports should be promoted to improve a range of physical, mental, and social health benefits. Furthermore, team-based sport can provide additional health and well-being benefits, including reduced loneliness due to the group nature of participation.
