Multilevel Growth Curve Analyses Research Articles

Exploring the role of mindfulness in the stress-recovery balance: 10-Day monitoring of young BMX riders in an intensive training center during a pre-competition cycle

Considering mindfulness as a multidimensional disposition domain-specific skill and state, this study aimed to explore the effect of the dimensions of mindfulness on the trajectories of biopsychosocial stress-recovery balance and on HRV over 10 days of a pre-competitive cycle. 24 young BMX riders completed mindfulness disposition and domain-specific skill scales. Monitoring of the recovery-stress states was based on biopsychosocial measurements (daily and biweekly). RMSSD was used to assess the organism ability to cope with the training program stimulus. After each training session, riders self-rated their state of mindfulness. Multilevel growth curve analyses examined the linear and/or quadratic trajectories of the athletes’ recovery-stress states and the effect of mindfulness on these trajectories. Mindfulness states results showed that the refocusing state had a significant negative quadratic effect over time on daily recovery and sport-specific recovery, and the awareness state on general recovery and total recovery. Concerning the dispositions of mindfulness, the observing component had a significant positive quadratic effect over time on daily stress. Nonreactivity had a significant positive quadratic effect over time on daily recovery and sport-specific recovery, and a significant positive effect on RMSSD. Acting with awareness had a significant positive effect on daily recovery and a significant negative effect on RMSSD. The study offered a better understanding of the effect of mindfulness (dispositions, domain-specific skills, and states) and its different components on the stress-recovery balance. The results suggest that mindfulness could be considered a promising effective psychological recovery strategy.

Exploring the associations between structural and functional aspects of social relationships and cognition in very old age

Objectives Few studies have examined the associations between social relationships and cognition in very old adults (80+ years). Moreover, limited research has considered structural and functional aspects of social relationships together when exploring their associations with cognition. Therefore, the present study aimed to investigate the associations between structural and functional social aspects and cognition in very old age. Method The sample comprised 518 two-wave participants of the NRW80+ Study, who showed no indication of dementia and an average age of 85 years at baseline (range: 80–97 years). They were assessed twice over an approximate 2-year interval. Multilevel linear growth curve analysis was employed to model cognitive development over very old age and to examine the associations between structural and functional aspects of social relationships and cognitive development. It was controlled for demographic and health characteristics. Results A larger social network size (ß = 0.05, 95% CI [0.02, 0.08], p = 0.002) and frequent compared with occasional, seldom, and no contact with others (ß = 0.16, 95% CI [0.03, 0.28], p = 0.013) were associated with higher global cognition in the fully-controlled model. Model comparisons further revealed that structural aspects better predicted global cognition in very old age compared to functional aspects (χ2(2) = 16.17, p < 0.001). Conclusion The findings underline the positive association between structural aspects of social relationships and global cognition in very old age. They also highlight the need for interventions promoting a socially active lifestyle to prevent cognitive decline in this vulnerable age group.

Daily trajectories of evening recovery experiences and their role for next-day mood.

Focusing on the definition of recovery as a process, we examined how the four core recovery experiences (i.e., psychological detachment, relaxation, control, and mastery) develop during the evening. We tested whether the specific developments of recovery experiences are important for next-day favorable mood states-beyond the mean levels of recovery experiences. We collected data from 92 employees who completed daily morning and afternoon surveys over 10 workdays. In the morning surveys, we implemented the day-reconstruction method to assess detailed information about employees' recovery experiences during several episodes of the previous evening. Our final data set included 477 morning surveys with a total of 1,998 episodes and 383 afternoon surveys. Multilevel growth curve analyses showed that, in general, psychological detachment, relaxation, and control follow a positive linear trend and mastery a negative quadratic trend during the evening. Moreover, path analyses showed that the day-level increase of psychological detachment is important for next-day mood. Specifically, we found that after evenings during which employees experienced a higher increase in psychological detachment than they usually did, they had higher favorable mood states in the subsequent afternoon. Further, our results did not support associations between day-level slopes of relaxation, control, and mastery as well as next-day mood. Hence, our study demonstrates that recovery experiences systematically change during an evening and that this change is partially relevant for next-afternoon mood. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Symptom Change during Waitlist for Medicated and Nonmedicated Patients with Chronic Depression

Introduction: Patients seeking psychotherapy often spend time on waitlist (WL), the effect of which is largely unknown. WL patients may forego alternative non-psychotherapeutic assistance and thus do more poorly than had they not been placed on a WL. The course of symptoms might also be influenced by use of antidepressant medication (ADM), an issue that remains unexplored in the literature. Objective: In a naturalistic setting, WL symptom change before inpatient psychotherapy (mean weeks of waiting = 22.6) was assessed in a sample (N = 313) of chronically depressed patients. Methods: Using the Beck Depression Inventory-II, patients’ symptoms were tracked at assessment, when admitted to treatment (i.e., after WL), at posttreatment and 1-year follow-up. Multilevel growth curve analysis was used to examine waitlist change for the whole sample as well as for ADM users and nonmedicated patients. Results: Symptoms were reduced significantly from assessment to admittance (Cohen’s d = 0.47). Symptoms reduced less for ADM users (d = 0.39) than for nonmedicated patients (d = 0.65). Conclusion: The findings indicate that chronically depressed patients experience a decrease in symptoms during WL, quite likely due to treatment expectations. We discuss whether less symptom improvement for ADM users could be attributed to iatrogenic comorbidity and a higher degree of demoralization in this group.

Effects of the COVID-19 Pandemic on Anxiety Symptoms in Long-Term Care Residents: A Multilevel Growth Curve Analysis.

The coronavirus disease 2019 (COVID-19) pandemic has negatively impacted the mental health functioning of older adults residing in long-term care (LTC) settings. This study examines the impact of the lockdown on anxiety symptoms over time in LTC residents. Secondary data analysis was conducted on clinical data obtained with permission from a large behavioral health company that provides behavioral health services in long-term care (LTC) and assisted living (AL) facilities. Data were obtained from 1149 adults (mean age 72.37, 70% female) in LTC and AL facilities across the United States who were receiving psychological services 1 year prior, and 1 year after, the COVID-19 pandemic lockdown. Changes in anxiety (measured using a clinician rating scale) over time before and after the pandemic were assessed using latent growth curve modeling with psychiatric diagnosis, psychiatric medication, and demographic factors included as covariates. Anxiety severity decreased over time before and after the onset of the COVID-19 pandemic. Although pandemic-level factors such as facility closure and telehealth availability did not affect anxiety over time, individual treatment factors such as obsessive compulsive disorder diagnosis, initial anxiety severity, bipolar disorder diagnosis, and prescriptions for anxiolytic and antipsychotic medications affected the trajectory of anxiety during the pandemic. These results demonstrate that individual covariates such as diagnosis, symptom severity, and medication use impacted the trajectory of anxiety symptoms before and during the COVID-19 pandemic more strongly than pandemic-related circumstances (facility closure, telehealth availability). The impact of the COVID-19 pandemic may be better observed through treatment-relevant variables, rather than pure symptom severity. In preparation for future pandemics or other large-scale disasters potentially impacting service delivery, facilities should continue to prioritize continuity of care or a timely resumption of services attending to individual treatment factors.

Effects of an Adventure Therapy Mountain Bike Program on Middle School Students’ Resiliency

ABSTRACT Early adolescence is an important developmental period marked by educational transitions and significant physical, mental, social, emotional, and cognitive changes. During this time, the prevalence of mental health issues begins to accelerate, and perceived support declines. Adventure therapy (AT), a group-based approach to counseling that uses kinesthetic activities to promote therapeutic progress, has the potential for increasing resiliency, thus protecting adolescents from these mental health issues and their potential long-term effects. The purpose of this study was to examine the effects of mountain biking on middle school students’ resiliency. Specifically, we were interested in comparing a mountain biking program with integrated AT concepts (AT-MTB) to the same mountain biking program without integrated AT concepts (MTB). Using a randomized-controlled design, we randomly assigned participants (n = 30) into a treatment group (AT-MTB) or a comparison group (MTB). Results of a multilevel growth curve analysis indicated that participants in the AT-MTB group experienced an increase in resiliency, while those in the MTB group experienced a decrease. Implications for practice and future research are discussed.

It Runs in the Family: Testing for Longitudinal Family Flynn Effects.

The Flynn effect refers to increases over time in measured (particularly fluid) intelligence of approximately 3 IQ points per decade. We define the Flynn effect at the family level, using longitudinal data and two new family-level cohort definitions. Multilevel growth curve analyses of the National Longitudinal Survey of Youth 1979 data showed that children in families with later-born mothers had higher average PIAT math scores, and lower average reading comprehension scores and growth, in young and middle childhood. Children in families where the first child was born later had higher average PIAT math, reading recognition, and reading comprehension scores, as well as larger developmental growth. The latter family-level Flynn effects were of higher magnitudes than the usual individual-level Flynn effect found in previous studies. Our results, showing family level-intercept and slope Flynn effects for both maternal birthyear and first child birthyear, have implications for research aiming to explain the Flynn effect.

Emotional intelligence training program for adolescents involved in intensive training centers

This study aimed to design and evaluate an emotional intelligence (EI) training program for adolescents involved in intensive sport training centers. A total of 31 young elite table-tennis players received EI training through six sessions and a recall period across a competitive season. The athletes completed (1) a self-reported questionnaire at the beginning and at the end of the program to assess intra-individual and inter-individual EI; and (2) a logbook twice a month during a period of 6 months including emotion regulation strategies (ERS), cognitive appraisals, and discrete emotions. The results highlighted an increased level of intra-individual EI, especially for understanding and regulation dimensions. Moreover, multilevel growth curve analyses (MGCAs) revealed adaptive changes for the reported levels of acceptance, refocus on planning, positive reappraisal, average less-adaptive ERS, self-blame, and catastrophizing strategies. These findings support a beneficial effect of the program on ERS. However, the analyses revealed limited results for discrete emotions. Finally, MGCAs also revealed adaptive trajectories in the scores of cognitive appraisals and thus provided further evidence of the benefits of the EI program on threat, challenge, and loss levels. In sum, this interventional study adds to a growing body of EI literature by proposing a theoretically based intervention for adolescents involved in a competitive and emotionally demanding environment. Lay summary: The emotional intelligence is now recognized as a crucial factor to success in competitive sport. It appears crucial to develop these competences among youth athletes which are exposed to various constraints. This study confirms that the emotional intelligence (as some emotion regulation strategies) can be improved with short and adapted interventions.

Association of patients’ pre-therapy strengths and alliance in outpatient psychotherapy: A multilevel growth curve analysis

Objective Meta-analytic evidence showed robust associations between the alliance in psychotherapeutic dyads and treatment outcomes. Recent studies have indicated that facets of positive mental health are additionally relevant predictors of both the alliance and success of psychotherapy. However, the impact of patients’ pre-therapy strengths on the alliance at the beginning and during treatment has been scarcely examined. Method 428 patients (62.4% female, M age = 40.79), treated by 41 therapists, underwent cognitive behavioral therapy in a German outpatient training and research center. Alliance from patients’ perspectives was assessed at the beginning and during treatment. Data were analyzed with multilevel growth curve modeling. Results Alliance increased during psychotherapy, with a quadratic trajectory best representing this trend on average, p < .001. Pre-therapy strengths were positively related to alliance intercept, b = 0.0537, p < .001. No interaction was found between the included time variables and pre-therapy strengths in the prediction of the alliance slope. Conclusion Positive mental health facets should be considered in psychotherapy research and practice. Future studies may focus on the parallel development of patients’ strengths with other process factors in treatment.

Differences in Teacher Burnout Between Schools: Exploring the Effect of Proactive Strategies on Burnout Trajectories

Differences in teacher burnout between schools are likely to occur due to differences in the quantity and quality of interaction within the schools. Multilevel latent growth curve analyses of burnout symptoms were performed on three-wave longitudinal data collected from 2,619 teachers in 75 schools in Finland. The results showed that differences in teacher burnout between schools were pronounced in cynicism, followed by emotional exhaustion. Organizational factors were not strong predictors of differences in teacher burnout. Proactive co-regulation strategies were related to lower levels of teachers’ cynicism about the professional community, implying that they might be useful in preventing the teachers’ cynicism at the school level.

An integrated mindfulness and acceptance-based program for young elite female basketball players: Exploratory study of how it works and for whom it works best

In order to better understand how an integrated mindfulness and acceptance-based intervention works and for whom it works best, study objectives were to examine (i) the trajectories of mindfulness skills and performance-related outcomes during the intervention, and athletes’ perceptions of the impact of the intervention; and (ii) the potential moderating effects of personality characteristics on changes in targeted variables associated with the intervention. The sample consisted of 40 young elite female basketball players (M = 16.33, SD = 0.75 years) from three incoming groups at the French Federal Basketball Center over a 3-year period. All players participated in a 15-week Mindfulness BasketBall Integrated program. They completed online questionnaires measuring personality traits 10 months before the intervention, as well as pre-, mid- and post-intervention measurements of mindfulness skills, intensity and directional interpretation of stress, and performance satisfaction. They also participated in semi-structured social validation interviews conducted one month after the intervention. The results of the multilevel growth curve (MGCA) and thematic analyses revealed how the mindfulness skills and performance-related outcomes evolved over the course of the intervention and how these changes were perceived by the athletes. Specifically, the MGCA showed significant linear increases in acceptance, positive stress direction, and performance satisfaction. The complementary social validation data indicated perceived improvements in mindfulness skills and performance. The MGCA also showed that baseline personality traits moderated the effects of the program on acceptance and experience of stress. These findings may be used to inform the design of more effective integrated mindfulness and acceptance-based interventions.

Trajectories of depressive symptoms among young adults in Texas 2014-2018: a multilevel growth curve analysis using an intersectional lens.

Research has demonstrated disparities in depressive symptoms among people who are marginalized. However, more work should examine depressive symptoms through an intersectional lens, recognizing that multiple systems of privilege and oppression interlock to create unique struggles where multiple marginalized identities meet. Recent methodological developments have advanced quantitative intersectionality research using multilevel modeling to partition variance in depressive symptoms to person-level sociodemographic variables and intersectional-level social strata. The purpose of this study is to leverage these methods to examine trajectories of depressive symptoms among young adults in Texas through an intersectional lens. Multilevel modeling was used to examine the longitudinal trajectories of depressive symptoms among 3575 young adults from 24 colleges in Texas assessed seven times between Fall 2014 and Spring 2018. Intersectional identities included sex, race/ethnicity, and sexual and gender minority identities. The model examined time nested within individuals and individuals nested within intersectional social strata. Young adults in Texasexperienced an increase in depressive symptoms from 2014-2018. Those with female, Hispanic, AAPI, other race/ethnicity, or LGBTQ + identities experienced more depressive symptoms. After controlling for the main effects of the sociodemographic variables, 0.08% of variance in depressive symptoms remained attributed to the effects of intersectional identities. Evaluating disparities in depressive symptoms through an intersectional lens offers a more complete description of the epidemiology of depressive symptoms.Communities and institutions that serve marginalized people should consider the elevated burden of depressive symptoms that marginalized people may carry, and integrate culturally competent psychoeducation, assessments, and therapies where possible.

Early Intergenerational Relationships and Later Support Provided to Older Parents: Time-to-Death as a Contingency

This paper focuses on whether stronger relationships with parents early in the family lifecycle results in adult children providing more support to them 45 years later, and whether this association is contingent on parents’ remaining years of life. We test time-to-death of parents as an indicator of vulnerability, an easy to ascertain and potentially powerful predictor of support. Data derived from the Longitudinal Study of Generations, a panel of three-generation families, originally fielded in 1971 and continuing to 2016. Focusing on the youngest generation (mean age = 19 in 1971), the analytic sample consists of 356 child-father relationships 473 child-mother relationships. We examined trajectories of instrumental support provided to parents over four waves between 1997 and 2016 as a function of each parent’s remaining years of life (mortality data from the National Death Index). We also examined variation in those trajectories based on frequency of shared activities and intensity of emotional closeness in 1971. Ordinal multi-level growth curve analysis revealed that proximity to death was a significant predictor of instrumental support provided over time. Only in child-father relationships did greater emotional closeness, as expressed in 1971, produce stronger associations between remaining years of life and provision of instrumental support. Findings are discussed in terms of understanding intergenerational dynamics that unfold over many decades and the utility of time-to-death as an alternative metric for assessing vulnerability. This research is timely in light of growing uncertainty about the family as a reliable source of care in later life, particularly for older men.

Collective Reactions to Epidemic Threat: Attachment and Cultural Orientations Predict Early COVID-19 Infection and Mortality Rates and Trajectories

Hypotheses on culture-level attachment and individualism/collectivism relationships with COVID-19 infection and death rates during a period at the beginning of the epidemic were tested in data from 53 countries and 50 U.S. states. Results from multilevel growth curve analyses showed group-average anxious attachment predicted a lower initial number of cases and deaths cross-culturally and in the United States, while avoidant attachment predicted a higher initial number of COVID-19 infections in the United States and a higher initial number of deaths in both studies. Yet, during this period, culture-level anxious attachment was associated with a higher growth rate of infections and deaths, while a lower growth rate of infections and deaths was observed in countries and U.S. states with higher individualism and avoidance. The research provides new insights into attachment and culture relationships and points to different mechanisms that may explain initial and growth rate trajectories at the beginning of the epidemic.

Practicing Other-Focused Kindness and Self-Focused Kindness Among Those at Risk for Mental Illness: Results of a Randomized Controlled Trial.

People with reduced levels of mental well-being might be at risk for developing future mental illness. Although several positive psychology interventions successfully improve mental well-being and psychological distress, less is known about their efficacy in a sample at risk for mental disorders. A Dutch sample of 289 participants with low or moderate levels of well-being were randomly assigned to other-focused kindness with reflection, other-focused kindness without reflection, self-focused kindness, or waitlist control (Trial register: NTR6786). Results of multilevel growth curve analyses revealed that other-focused kindness, but not self-focused kindness, led to improvements in the primary outcome mental well-being relative to waitlist control up to 6-week follow-up. By contrast, only other-focused kindness without reflection led to improvements in psychological distress. The three kindness conditions mainly did not differ from one another, and mainly no differences were found up to 6-months follow-up. An exception was that perceived stress was significantly more reduced up to 6-week and 6-months follow-up when people practiced other-focused kindness without reflection then when participants had practiced self-focused kindness. These findings point to the benefits of practicing kindness for others when people might be at risk for future mental illness. The study also indicates that reflecting about practicing kindness does not seem to have added value.

Psychological factors and trajectories of post-surgical pain: A longitudinal prospective study.

A significant proportion of patients do not experience relief from pain during the early postsurgical period after joint arthroplasty and are at risk for developing chronic pain. The objectives of this study were to identify biopsychosocial factors associated with acute postsurgical pain trajectories and with pain intensity and interference after 1, 3, and 12 months. Two hundred ten patients listed for joint arthroplasty filled a presurgical battery of questionnaires assessing presurgical pain intensity, catastrophizing, emotional distress, state anxiety and depression, self-efficacy, central sensitization, and executive functions. From the day after surgery, they were asked to fill a 7-day diary, including questions about postsurgical pain and postsurgical state catastrophizing. Finally, they provided data about pain intensity and interference after 1, 3, and 12 months. Predictors of acute pain trajectories were investigated using multilevel growth curve analysis. Results showed that central sensitization was a predictor of the intercept of pain trajectories and daily postsurgical catastrophizing was a significant covariate of pain intensity in the acute phase. Analyses of follow-up data showed that central sensitization was a predictor of pain intensity and pain interference at 3 and 12 months, that emotional distress was related with pain intensity and interference at 1 month, and with pain interference at 3 months, and that cognitive flexibility was associated with pain interference at 1 month. Assessment of these factors could enable to identify patients at risk for worse outcomes and to plan targeted treatments to be implemented during the patient's inward stay.

The Rise, Demise, and Reprise of the Increasingly Protracted APA Journal Article?

Are APA journal articles getting longer or shorter over time? Earlier work that examined changes over time in article length in 24 APA journals (1986–2005) found that pages per article increased over time for the average journal, peaking around 2001, and then plateaued thereafter. But have these trends continued during the past 14 years? The current research extends prior work by adding additional years (1986–2019) and four additional journals (28 journals, 34 years, and 865 total observations). Multilevel growth curve analyses revealed a cubic effect of time on average article length, showing an increase in the 1980s and 1990s, a plateau or slight decline in the 2000s, and a slight increase again in the 2010s. Journal impact factors (JIFs) moderated linear growth over time; journals with higher JIFs had larger linear increases in article length. Exploratory multilevel interrupted time-series analyses suggested that the average linear increase in pages per article over time was greater after the start of psychology’s credibility crisis (2012–2019) than before it (1986–2011), which may relate to an increased emphasis on reporting details and transparency. We discuss implications for article length in the contexts of publishing and psychology’s ongoing credibility crisis.

Neighborhood Profiles and Body Mass Index Trajectory in Female Adolescents and Young Adults

PurposeThe purpose of this study is to identify distinct neighborhood profiles patterned by key structural, physical, and social characteristics and test whether living in different profiles are associated with body mass index trajectories during adolescence in racial/ethnic minority female youth. MethodsParticipants were 1,328 sexually active female adolescents and young adults aged 14–23 years, predominately Hispanic and black, enrolled in an human papillomavirus type 4 vaccine (Gardasil) surveillance study at a large adolescent health clinic in New York City between 2007 and 2018. Body mass index was calculated from weight and height every 6 months. A comprehensive set of neighborhood structural, social, and physical characteristics from multiple national and state datasets was linked to each participant based on home address. ResultsLatent profile analysis revealed five distinct neighborhood profiles in New York City: High Structural/High Social Advantage, Moderate Advantage/Low Crime, Low SES (Socioeconomic Status)/High Activity, Low SES/High Social Advantage, and High Disadvantage. Results from multilevel growth curve analysis revealed that living in Low SES/High Activity neighborhoods was associated with a lower BMI at age 22 (b = −1.32, 95% confidence interval −2.49, −.16), as well as a slower increase in BMI from age 14 to 22 years (b = −.22, 95% confidence interval −.46, .02), compared to the High Disadvantage profile. ConclusionsOur findings suggest that improving neighborhood structural, social, and physical environments may help promote healthy weight and reduce health disparities during adolescence and young adulthood.

Athletes’ motivational and emotional outcomes related to a Need-Supportive intervention in intensive training centers

The aim of this study was to set up an intervention program promoting a need-supportive style for elite coaches, and to evaluate its effects on athletes’ emotional and motivational outcomes during the competitive season. Seven coaches of 16 elite table tennis players from two intensive training centers received a need-supportive intervention, comprising an initial theoretical session and video analyses of coaching sessions. The athletes reported their self-determined motivation (i.e., intrinsic motivation, integrated regulation, identified regulation, introjected regulation, external regulation, and amotivation), basic psychological need satisfaction (BPNS, for autonomy, competence, and relatedness) and thwarting (BPNT, for autonomy, competence, and relatedness), and positive and negative emotions (i.e., anxiety, anger, excitement, dejection, and happiness) in a logbook twice a month during the intervention period. Multilevel growth curve analyses revealed a decrease in the BPNT levels for autonomy and competence and an increase in BPNS for autonomy. Moreover, the results also showed improved trajectories for emotional outcomes including anxiety, anger, excitement, and happiness. Altogether, these findings complement the body of knowledge on Self-Determination Theory (SDT) in intensive training settings. Moreover, the motivational and emotional trajectories support the possibility of promoting elite athletes’ outcomes with targeted sessions that are suitable for the competitive environment. Despite the absence of a control group, the program provides additional knowledge about the effects of longitudinal and practical need-supportive interventions comprising reflective practice analysis of coaching in intensive training centers. Lay summary: This study explored the effects of a need-supportive intervention on athletes’ psychological experiences in intensive training centers. The intervention was targeted at the coaches and comprised theoretical knowledge and practical analyses. The results revealed an improvement in some motivational and emotional experiences of the athletes. IMPLICATIONS FOR PRACTICE Motivational and emotional experiences of young athletes can be improved with a need-supportive intervention. Practical analyses of coaches, based on the Self-Determination Theory, represent an opportunity to foment a need-supportive climate. A need-supportive climate can be promoted in intensive training centers with short targeted interventions.

The effects of exercise intensity on the cortisol response to a subsequent acute psychosocial stressor

ObjectiveThe aim of this experimental study was to determine the extent to which the intensity of a single 30 min bout of exercise alters the salivary cortisol (sCort) response to a subsequently induced acute psychosocial stressor. The study further aimed to elucidate a physiological mechanism through which exercise intensity exerts stress-mitigating effects. MethodsEighty-three healthy men (Mage = 21.04 SD = 2.89) were randomly assigned to exercise on a treadmill at either 30%, 50% or 70% of their heart rate reserve (HRR) for 30 min and then underwent the Trier Social Stress Test 45 min later. sCort was measured repeatedly throughout and following the exercise bout and stressor task. ResultsANCOVA and Multilevel Growth Curve Analysis determined that vigorous (70% HRR) exercise elicited dampened sCort responses to the stressor task, marked by lower total sCort levels, diminished sCort reactivity, and faster recovery to baseline values, as compared to less intense exercise. Moreover, exercise elicited a sCort response in proportion to the intensity at which it was performed, and this exercise-associated HPA-axis response was inversely proportional to the sCort response to the subsequent stressor task. ConclusionsThis study revealed that exercise-intensity dampens the HPA-axis stress response in a dose-dependent manner, with evidence that the cortisol released from exercising intensely suppresses the subsequent cortisol response to a psychosocial stressor.