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Effects of Mental Fatigue on Depth Jump in Division I Female Soccer Players

Madison M. Gaffney, Robin Ammon, Jong-Sung Yoon, and Hyung Suk Yang

Mental fatigue has been shown to hinder physical performance, especially in endurance-based sports. However, little research has been done concerning the impacts of mental fatigue on shorter maximal effort movements commonly encountered in sports activities, such as the depth jump. The purpose of this study was to investigate the effects of mental fatigue on depth jump performance and lower limb kinematics in Division I female soccer players. Eighteen participants performed depth jumps before and after a mentally fatiguing Stroop task. Multiple paired t tests were used to examine differences in dependent variables across conditions. The findings revealed a decrease in jump height (p = .002), propulsive impulse (p = .004), and peak hip adduction angles on the left (p = .003), while knee kinematics remained unchanged. This study challenges previous research on maximal anaerobic exercises, revealing mental fatigue’s potential influence on jumping and landing movements. However, mixed results in lower limb kinematics warrant further investigation. The study provides insights into the intricate relationship between mental fatigue and athletic capabilities, emphasizing the need for tailored interventions and further exploration of sport-specific movements.

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Qigong Training Effects on Brain-Derived Neurotrophic Factor and Cognitive Functions in Sedentary Middle-Aged and Elderly Females With Type 2 Diabetes

Sanita Singsanan, Nongnuch Luangpon, Sirirat Kiatkulanusorn, Patcharee Boonsiri, Martin Burtscher, and Kultida Klarod

Type 2 diabetes mellitus (T2DM) heightens dementia and cognitive decline risk, notably impacting working memory and executive functions. This study investigates the impact of 8 weeks of qigong training on cognitive functions, blood pressure, plasma brain-derived neurotrophic factor (pBDNF), antioxidant, and biochemical outcomes in sedentary middle-aged and elderly women with T2DM. Thirty-five sedentary middle-aged and elderly women with T2DM were assigned to qigong exercise (QG = 19) or control (CG = 16) groups. Qigong exercise group performed the qigong exercise three times per week, for 8 weeks. The cognitive functions and pBDNF as primary and secondary outcomes (blood pressure parameters, antioxidant, and blood cell indices) were measured at baseline and postexercise training. While cognitive performance did not change, there was a significant interaction (Group × Time), indicating reduced pBDNF levels postintervention in the qigong exercise group (p < .05). Both mean arterial blood and pulse pressure values decreased after qigong training (p < .05), but no significant interaction effects (Time × Group) were seen. There was a pulse pressure reduction after qigong training (p < .05), which was significantly correlated with the increase in longest digit span forward (r = −.34, p < .05). Antioxidant levels decreased from PRE to POST within both groups. This study demonstrated that 8 weeks of qigong training reduced pBDNF levels in sedentary middle-aged and elderly women with T2DM, which is unrelated to cognitive function improvements but possibly indicating a favorable response to exercise. Additionally, reduced blood and pulse pressure, potentially enhancing cognitive function by favorably impacting the autonomic nervous system by qigong training.

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Acute and Transient Match-Related Fatigue in University Female Footballers

Andrew N. Hearn, John K. Parker, Kirsty M. Hicks, and John F.T. Fernandes

This study aimed to examine the acute fatigue response experienced by female footballers during and after match-play. Twenty university footballers completed three trials of a countermovement jump on a force platform pre- and post-match-play (35 observations). External and internal loads were recorded during match-play via global positioning systems (GPS) and heart rate (HR), respectively. Match-play loads were split into thirds and analyzed via linear mixed model. Pre- and postjump metrics (n = 16) were analyzed using a paired samples t test. Significant decrements were observed between the first and final third for all external load metrics apart from sprint distance and accelerations (p > .05). Relative concentric peak force (p = .035) was significantly increased postmatch, while a reduction was observed for relative concentric mean power (p = .034). The remaining 14 metrics did not display any significant changes (p > .05). The stability of countermovement jump (CMJ) performance pre- to postmatch alongside the reductions within match support the notion of transient fatigue. Moreover, coaches can use this data (i.e., transient fatigue) to inform tactics in female football (i.e., substitutions) and conditioning regimes.

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Women Movement Behaviors During Pregnancy and 2 Years After Childbirth: Physical Activity, Sedentary Time, Sleep, and Rhythm Changes in a Brazilian Birth Cohort

Andrea Wendt, Rafaela Costa Martins, Adriana Kramer Fiala Machado, Luiza I.C. Ricardo, Shana Ginar da Silva, Bruna Gonçalves Cordeiro da Silva, Gregore I. Mielke, Marlos Rodrigues Domingues, Pedro C. Hallal, and Inácio Crochemore-Silva

Objective: To describe physical activity (PA), sleep, and rhythm patterns during 24-hr cycles from the second trimester of pregnancy up to 2 years after childbirth. Methods: This longitudinal study used data from mothers of the 2015 Pelotas Birth Cohort (Brazil). Women were invited to wear the accelerometer during 7 days on the nondominant wrist during the second trimester of pregnancy and 2 years after childbirth. Data collected included PA, sleep, and rhythm variables. We compared the means/medians of variables during the pregnancy and 2 years after the childbirth. We also describe the shape of acceleration across the day in the two evaluated periods and stratified this curve according to covariables. Results: This study includes data from 1,293 women with valid accelerometer data for both periods. The nonbouted moderate-to-vigorous PA average was 94 min during pregnancy and increased to 122 min 2 years after childbirth (p < .001). Sleep decreased by 11 min (388–377 min; p < .001) in the evaluated period. The pattern of acceleration across the day did not change in the evaluated period with two marked spikes of activity at 10 a.m. and 6 p.m. The amount of activity, however, increased. Conclusions: These findings may be helpful to better understand changes in PA and sleep during this specific period of life and assist in planning recommendations.

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Research Across the Female Life Cycle: Reframing the Narrative for Health and Performance in Athletic Females and Showcasing Solutions to Drive Advancements in Research and Translation

Kelly L. McNulty, Bernadette C. Taim, Jessica A. Freemas, Amal Hassan, Carly Lupton Brantner, Chimsom T. Oleka, Dawn Scott, Glyn Howatson, Isabel S. Moore, Kate K. Yung, Kirsty M. Hicks, Matthew Whalan, Ric Lovell, Sam R. Moore, Suzanna Russell, Abbie E. Smith-Ryan, and Georgie Bruinvels

Over the last few decades, there has been an unprecedented growth in the number of females in sport and exercise, including an exponential rise in female participation, alongside an increased interest and investment in female sport. This success in many aspects underscores the demand for and importance of female-specific research to optimize health, participation, and performance of athletic females. It has also brought awareness to the numerous inequities that exist between females and males. Indeed, the prevailing narrative within sport and exercise science focuses on the disparity of research in females compared with males, which has led to a lack of a critical mass of high-quality data on athletic females. While acknowledging the current gap and the need for further higher quality data, there is still a body of knowledge pertaining to athletic females spanning over a century. This existing literature, amid its criticisms, offers a valuable foundation to build upon for current translation and to inform future research. Thus, it is essential to acknowledge, interpret, and apply prior learnings from previous work, while also considering any limitations. This commentary proposes a reframing of the current narrative that there is an absence of useful data in athletic females, to one that recognizes both the strides made and how past findings can be integrated into practice today as well as inform future research directions. It also addresses the opportunities that remain, and how a more comprehensive and pragmatic body of knowledge can be developed and translated to better serve athletic females in the future.

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NetballSmart, Implementation of a National Injury Prevention Program

Suzanne Belcher, Sharon Kearney, Matt Brughelli, Natalie Hardaker, and Chris Whatman

Reducing lower-limb injuries in netball, particularly anterior cruciate ligament injuries, is a priority. The Accident Compensation Corporation (a no-fault national insurance system) partnered with Netball New Zealand to create the “NetballSmart” injury prevention program. Targeted research informed the successful implementation, dissemination, and adoption of the injury prevention program. Research included a nationwide epidemiological study, video analysis investigating netball injury risk maneuvers, and intervention studies exploring the effectiveness of injury prevention program warm-up resources on physical capability in youth netball. An identified spike in ankle-knee injury incidence of school-age netball players at season start and prior to tournaments along with a high overall prevalence within these ages led to the creation of age-specific educational workshops and resources focused on effective preparation, skill transition, strengthening, and balance. Observational video analysis highlighted behaviors that potentially increased the risk of anterior cruciate ligament injury and a progressive landing skills program was developed. The NetballSmart Dynamic Warm-up and Power Warm-up significantly improved player physical capability. Consequently, time to perform the Power Warm-up before all games at a national intermediate school tournament was incorporated into competition-time, reducing workload by 25%. A targeted social media and ambassador endorsement plan increased performance of the NetballSmart Dynamic Warm-up/Power Warm-up by 14% prior to games and 15% before trainings nationally. Accident Compensation Corporation injury data between 2018 and 2022 showed a 6,050 (32%) reduction of all body site and a 2,968 (33%) decrease of combined ankle-knee injury claims. Similarly, by 2021 there was a 11% decrease in fractures/dislocations, a 13% decrease in soft tissue injuries, and a 9% decrease in anterior cruciate ligament surgical repairs. During this delivery period, Accident Compensation Corporation reported that the whole of life returns on investment was NZD$4.10, for every dollar funded to the NetballSmart Injury Prevention Programme.

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Are There Sex Differences in Anaerobic Performance Following a Dynamic Warm-Up? A Randomized, Counterbalanced, and Crossover Design Study

Kara Fulawka, Alexander Schleper, Lucas Forsyth, Trisha Scribbans, Robert Anzalone, and Rodrigo Villar

The increasing trend of females participating in elite and historically male-dominated sports has also resulted in a rise in females performing dynamic warm-ups (DWs). DW is a widely used practice in hockey. However, there is scarce evidence describing how DWs impact subsequent anaerobic performance and whether this response differs between sexes. This study aimed to determine sex differences in anaerobic performance when preceded by a DW. Twenty National Collegiate Athletics Association Division-II hockey players (n = 20, 10 female) completed a Wingate Anaerobic Test (WAnT) preceded by a DW or no warm-up in a randomized, counterbalanced order and followed a crossover design. The DW was ∼8 min long and consisted of 13 movements that targeted prime muscles and joints involved in ice skating. The WAnT consisted of a 30-s, maximal effort sprint against 7.5% of the participant’s body mass performed on a cycle ergometer. Peak power output (PPO), relative peak power (RPP), mean anaerobic power (MP), and fatigue index (FI) evaluated anaerobic performance during the WAnT. There were no significant differences between male and female scores following DW. MP was significantly higher in males and females, but PPO, RPP, and FI were not when a DW preceded the WAnT. In both conditions, males had higher PPO and MP than females, while there were no sex differences in RPP and FI. In conclusion, performing a DW before a WAnT improved MP for females and males with no adverse effects on PPO, RPP, and FI. This study suggests that DW might benefit hockey players independently of sex.

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Factors Influencing Hard Running Distances in National Collegiate Athletics Association Division I Women’s Soccer Players

Isaac A. Sam, Amanda A. Anderson, Emma L. Johnson, and Hyung Suk Yang

As the total distances covered in soccer games have remained relatively constant, the hard running distances (HRDs) covered by players have shown variations due to the higher physical demands and dynamics of team running performances. Although factors affecting the total distances covered in a match are multifactorial, no study has specifically examined match performance indicators (MPIs) that impact HRD. Consequently, the purpose of this study was to better understand how MPIs (hard running efforts, turnovers, minutes played, duels won, duels lost, and pass completions) are associated with HRD and to investigate how each variable contributes to HRD using multiple regression analysis. The study included a sample of 21 female Division I soccer players aged between 18 and 22 years (mean ± SD = 20 ± 1.32 years), all of whom were outfield players: center backs (n = 5), defensive midfielders (n = 4), outside midfielders (n = 5), center-attacking midfielders (n = 4), and center forwards (n = 3). Overall, all MPIs were positively associated (.639 ≤ r ≤ .992) with HRD, yet hard running efforts showed the strongest relationship with HRDs (r = .992). The regression models indicated that all variables contributed to HRD. In particular, hard running effort had the most significant impact (p < .001), implying its dominant influence on HRD compared with other variables. These findings may play a pivotal role in supporting coaches and trainers to better understand the influence of MPIs on HRD. The models developed could help predict a player’s workload related to HRD.

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Sports Participation During Adolescence and Menstrual Cycle Education Status in Females Across Six Territories

Phoebe Law, Natalie Brown, Charles Pedlar, and Georgie Bruinvels

Introduction: There is a substantial amount of sporting dropout in teenage girls worldwide linked, in part, to the menstrual cycle (MC). Firstly, this study aimed to retrospectively quantify the reasons for decreased sport and, or, exercise (sports/exercise) participation during adolescence across different countries. Secondly, this study investigated the prevalence, source, and content of MC education received in relation to sports/exercise. Methods: A survey was distributed via the Strava app to six geographical territories. The survey captured retrospective reasons for changing sports/exercise participation levels during adolescence and the provision, content, and source of MC education received in relation to sports/exercise. Descriptive statistics were reported as frequencies and associations between countries, education, and adolescent participation levels were determined using chi-square analysis (p = .01). Results: Female Strava users (M = 40.8 years, SD = 10.7 years) from six territories completed the survey (n = 10,371). 24.8% of participants decreased their sports/exercise participation during adolescence with the United Kingdom and Ireland (39.7%) and Spain (39.1%) reporting significantly higher decreases than the other countries surveyed, χ2(10)=1,023.77, p ≤ .001. The most common reason for decreased participation was a lack of time (28.0%). 71.1% of participants had not received education. Of those that were educated, the most common source was “self-education” (69.8%) and content was “to keep levels of exercise the same” (29.8%). Conclusions: There is a need for education to be available and easily accessible for girls and women which provides instructions on managing the MC and other commitments alongside sports/exercise, and highlights the many benefits of participating in regular sports/exercise.

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Risk of Low Energy Availability, Disordered Eating, and Menstrual Dysfunction in Female Recreational Runners

Marissa Miles, Kelly Pritchett, Robert Pritchett, and Abigail Larson

Introduction: Running is characterized by high physiological demands with an emphasis on body weight, which may lead to a greater risk of developing low energy availability (LEA) and/or disordered eating (DE). The prevalence of LEA among recreational runners has not been well defined, and this population may lack the ability to distinguish between nutrition resources that are evidence-based or not. Purpose: This study investigated (a) the prevalence of those at risk for LEA, menstrual dysfunction (MD), and risk of DE and (b) compared the risk of DE, training volume, and body weight dissatisfaction between female recreational runners at risk for LEA versus not at risk for LEA. Methods: Female recreational endurance runners (n = 1,923) completed an online questionnaire that included the Low Energy Availability in Females Questionnaire to evaluate LEA risk and MD, and the Disordered Eating Screening Assessment to evaluate DE risk and body weight dissatisfaction. Results: 53.04% of participants are at risk for LEA, 42.5% are at risk for DE, and 61.7% reported MD. Conclusions: The current study suggests that recreational runners are at an increased risk for LEA and DE. Furthermore, DE, MD, training volume, and weight dissatisfaction may be associated with LEA in recreational runners. These findings highlight the need for education and preventative measures around LEA, MD, and DE among recreational female runners.