Jens Kleinert

EEG activity and mood in health orientated runners after different exercise intensities.

An increasing number of studies within the recent years connected physical exercise with changes in brain cortical activity. Most of this data (1) refers to aerobic exercise and (2) does not correlate to psychological parameters although it is well known that exercise has a positive effect on mood. In times where health activities play a major role it is increasingly necessary to connect somato-physiological and somatopsychological components of physical activity. This study aimed to find changes in EEG activity and mood after low, preferred and high intensity running. EEG and actual state of mood were recorded before and after exercise. Results showed an effect for the preferred and high intensity velocity in both, EEG and mood. As only the higher frequency areas N18 Hz showed persisting decreases post-exercise we concluded that this might be a sign of outlasting effects of exercise on brain cortical activity which may have influences on general well-being. We could also show that there is a clear relationship between EEG activity and mood reflecting a basic principle of cortical excitation.

Exercise as a countermeasure to psycho-physiological deconditioning during long-term confinement

Confinement studies are performed to simulate the psychological effects that may be experienced on a long-term space flight. A general psycho-physiological model assumes that mood and cognitive functioning are impaired during confinement as a result of an absence of physical activity. The aim of the MARS500 study initiated by the Institute of Biomedical Problems (IBMP) and the European Space Agency (ESA) is to gather data, knowledge and experience to help prepare for a real mission to Mars. A test run with 105 days of isolation was performed prior to 520 days of isolation. Psycho-physiological data of this study are presented here. We hypothesized that exercise, as it has been shown in laboratory settings, would be able to prevent and counteract mood changes during isolation. Electrocortical data (EEG) and a self report on current psychological and physical state were recorded several times prior to and after exercise during the isolation period. Data revealed a clear effect of exercise on mood and electrocortical activity. Moreover, it was shown that mood and brain cortical activity decreased during the first 11 weeks of isolation and reached baseline again in the last week of isolation. A correlation analysis revealed a significant relation between mood data and electrocortical activity. We conclude (1) that confinement is accompanied by psycho-physiological changes and (2) that exercise is a suitable method to counteract psycho-physiological deconditioning during confinement.

Adjektivliste zur Erfassung der Wahrgenommenen Körperlichen Verfassung (WKV)

Zusammenfassung. Zielsetzung der vorliegenden Arbeit ist die Konstruktion und Validierung einer Skala zur Erfassung der aktuell wahrgenommenen korperlichen Verfassung. Auf der Basis eines durch Experten bewerteten Adjektivpools wurde eine 48 Items umfassende Vorversion konstruiert (WKV-48) und an einer Gruppe von 119 Sportstudierenden erprobt. Eine exploratorische Faktorenanalyse fuhrte zu einer 4-Faktoren-Struktur der Daten, auf deren Basis eine 20-Item-Endversion (WKV) erstellt wurde, die an 645 gesunden und kranken Menschen unterschiedlichen Alters und unterschiedlicher sportlicher Erfahrung validiert wurde. Wahrend sich in konfirmatorischen Faktorenanalysen keine zufrieden stellende Anpassungsgute zum 4-Faktoren-Modell ergab, fielen die Reliabilitat der Subskalen und insbesondere die Sensibilitat der Skala fur Veranderungen der korperlichen Zustandslage zufrieden stellend bis sehr gut aus. Korrelationen zur psychischen Befindlichkeit waren zumeist signifikant, aber gering ausgepragt. Insgesamt empfieh...

The effect of parabolic flight on perceived physical, motivational and psychological state in men and women: Correlation with neuroendocrine stress parameters and electrocortical activity

Previous findings of decreased mental and perceptual motor performance during parabolic flights have been attributed mainly to the primary effects of weightlessness rather than the accompanying effects of stress and altered mood. Although recent studies have alluded to the possible negative effects of stress on performance, there has been no attempt to investigate this during parabolic flights. Over a period of 3 years, 27 human participants (male n = 18, mean age ± SD 34.67 ± 7.59 years; female n = 9, 36.22 ± 9.92 years) were recruited with the aim to evaluate if, and to what extent, parabolic flights are accompanied by changes in mood. Furthermore, the relationships between mood and physiological markers of stress and arousal, namely circulating stress hormones (ACTH, cortisol, epinephrine, norepinephrine, prolactin and brain activity (EEG)) were investigated. A strong and significant correlation was found between circulating stress hormone concentrations and perceived physical state, motivational state (MOT) and psychological strain (PSYCHO), whereas no interaction between mood and EEG or EEG and stress hormone concentrations was observed. Therefore, two different stress responses appear to be present during parabolic flight. The first seems to be characterised by general cortical arousal, whereas the second seems to evolve from the adrenomedullary system. It is likely that both these mechanisms have different effects on mental and perceptual motor performance, which require further investigation and should to be taken into account when interpreting previous weightlessness research.

An approach to sport injury trait anxiety: Scale construction and structure analysis

We examined the structure of sport injury trait anxiety and its relationships to sociodemographic and personality variables. Based on the discussion of anxiety concepts, sport injury trait anxiety is defined as a widely indefinite concern or worry to sustain an injury in different sport situations. Furthermore, referring to the stress-injury model, I assume interdependencies between injury anxiety on the one hand and general anxiety, injury history, and physical self-concept on the other hand. Based on this theoretical background, a 22-item scale was constructed, by which a persons concern or worry to sustain an injury in different sport situations could be specified. One hundred and fifty-four male and 107 female sport students were questioned by means of this Sport Injury Trait Anxiety Scale (SITAS). An exploratory factor analysis led to three dimensions of situations that cause injury anxiety: situations with low competency, situations with high importance, and situations with loss of control. Analyses of correlation merely showed low relationships of these three dimensions to general trait anxiety (STAI) and scales of physical self-concept. The results underline the necessity of sport- and injury-specific anxiety scales to examine the sport injury process.

Responses of serum neurotrophic factors to exercise in pregnant and postpartum women.

It was recently shown in humans that exercise affects the neurotrophic factors known to function as neurogenesis regulators. No data related to exercise and pregnancy, however, is yet available. Thus, we investigated the effects of acute exercise on pregnant women during late pregnancy and women postpartum, on the serum concentration of the brain-derived neurotrophic factor (BDNF), the insulin-like growth factor 1 (IGF-1), the vascular endothelial growth factor (VEGF), prolactin (PRL) and cortisol (COR). Twenty women with uncomplicated pregnancies underwent a graded submaximal exercise test during pregnancy (weeks 32-36 of gestation; T(1)) and postpartum (10-12 weeks after childbirth; T(2)). On two of these test days the women carried out an intensifying exercise test (25 W steps) on a cycle ergometer until a heart rate of 150 bpm was reached. Blood samples were taken in the rest period before beginning the exercise, immediately at the end of the exercise and after recovery periods of 5 and 10 min, respectively. Basal maternal IGF-1, PRL and COR were found to be higher during T(1) (p<.01), while the BDNF was higher during T(2) (p=.00). VEGF was not detectable in the serum of the pregnant women. During T(2), VEGF, which was found to be within the normal range before exercise, was at a higher level after exercise (p<.01). Exercise increased the BDNF and IGF-1 during T(1) and T(2) (p<.01). This study also shows that exercise increases the serum concentrations of IGF-1 and BDNF during pregnancy and postpartum as well as VEGF postpartum. Thus, exercise might be a beneficial lifestyle factor with therapeutic/public health implications i.e. with regard to maternal mood and cognitive performance.

Mood states and perceived physical states as short term predictors of sport injuries: Two prospective studies

Abstract The present contribution discusses mood states and perceived physical states as elements of the process of sport injury development. The two conducted studies are based on a theoretical model, which sees psychological and psycho‐physiological states as the consequence of situational appraisals that depend on perceived tasks and psycho‐physiological situational loads. In this model, states affect both cognitive and motor functions, and thus, lead to injury‐related behavior. Both studies have prospective designs. Psychical states (mood and state of motivation) and perceived physical states were measured by the use of adjective lists at the beginning of a one‐day (Study I) or a three‐day (Study II) period. Physicians and physiotherapists measured the frequency and severity of injuries. Stepwise logistic regression models were computed with regard to injury variance; depending on the injury criterion, 28% (Study I) and 1–5% (Study II) of injury variance could be explained. Besides some inconsistent results, perceived physical health and sociability were significant predictors in both studies, insofar as a high injury rate is accompanied by low perceived health and high sociability. The results are discussed, taking into consideration the closeness of body perception to reality and the influence of sociability on prevention behavior. Furthermore, from a methodological point of view, the predictability of injuries is discussed regarding the time lag between the assessment of states and the incidence of injury.

Centrifugal acceleration to 3Gz is related to increased release of stress hormones and decreased mood in men and women.

It has been suggested that the central and peripheral neural processes (CPNP) are affected by gravitational changes. Based on the previous experiments during parabolic flights, central and peripheral changes may not only be due to the changed gravitational forces but also due to neuroendocrine reactions related to the psycho-physiological consequences of gravitational changes. The present study focuses on the interaction of neuroendocrine changes and the physical and mental states after acceleration to three-time terrestrial gravity (3Gz). Eleven participants (29.4 ± 5.1 [SD] years (male (n = 8): 30 ± 5.1 years; female (n = 3): 27.7 ± 2.1 years) underwent a 15 min acceleration to 3Gz in a human centrifuge. Before and after the acceleration to 3Gz circulating stress hormone concentrations (cortisol, adrenocorticotropic hormone (ACTH), prolactin, epinephrine, norepinephrine) and perceived physical and mental states were recorded. A second control group of 11 participants underwent the same testing procedure in a laboratory session. Serum cortisol concentration during exposure to the centrifugal acceleration increased by 70%, plasma concentration of ACTH increased threefold, prolactin twofold, epinephrine by 70% and norepinephrine by 45%, whereas the perceived physical well-being decreased. These findings demonstrate that psycho-physiological changes have to be regarded as a relevant factor for the changes in CPNP during phases of hypergravity exposure.

Collective efficacy or team outcome confidence? Development and validation of the Observational Collective Efficacy Scale for Sports (OCESS).

Motivational research over the past decade has provided ample evidence for the existence of two distinct motivational systems. Implicit motives are affect-based needs and have been found to predict spontaneous behavioral trends over time. Explicit motives in contrast represent cognitively based self-attributes and are preferably linked to choices. The present research examines the differentiating and predictive value of the implicit vs. explicit achievement motives for team sports performances. German students (N = 42) completed a measure of the implicit (Operant Motive Test) and the explicit achievement motive (Achievement Motive Scale-Sport). Choosing a goal distance is significantly predicted by the explicit achievement motive measure. By contrast, repeated performances in a team tournament are significantly predicted by the indirect measure. Results are in line with findings showing that implicit and explicit motive measures are associated with different classes of behavior.It has been argued that representative tasks are needed to understand the processes by which experts overcome their less skilled counterparts. Little is known, however, about the essential characteristics of these tasks. In this study we identified the degree to which a laboratory-based task of decision making in cricket batting represented in-situ performance. The in-situ task required skilled batters to play against a bowler across a range of delivery lengths. Skilled batsmen produced a transitional pattern of foot movements with front foot responses being dominant for balls landing 0 – 6m from the wicket and back foot responses for balls landing 8 – 14m from the wicket. In the laboratory-based task, the same batsmen viewed video footage of the same bowlers. Again, skilled batsmen responded with similar patterns of foot movement transitions. Novice batsmen produced a generic forward movement in response to all deliveries. We conclude that for decision making about delivery length, the laboratory-based task has a high degree of fidelity and reliability. The implications of these results are discussed in relation to the importance of establishing the necessary degree of fidelity of representative task designs in order to study perception and action more accurately.In this study the specific foci were as follows: (1) to identify profiles of athletes in the junior-to-senior transition (JST) based on their personal characteristics (athletic identity, self-estee ...The present research sheds light on the importance of physical activity with regards to self-concept in Spanish adolescents and considers physical exercise, family and academic variables. An explanatory and relational study was conducted. A total of 2,134 teenagers aged between 15 and 18 years old participated in the study. A descriptive and relational analysis by means of the ANOVA Test was also undertaken. The results obtained are discussed here taking into account the relevant specialised literature. It was found that two thirds of the students sampled did exercise regularly, team sports being the most popular. These learners presented a high degree of self-concept, particularly for the social and family dimensions. It can also be concluded from this study that better physical condition and appearance are related to sport engagement, and that physical activity is related to improved self image and to fostering social and family relationships.Previous research has shown that skilled football goalkeepers effectively utilised individualised visual search patterns to gather anticipatory cues from a penalty taker. Deceptive cues employed by a penalty taker induced lower save rates. However, it is unclear if goalkeeper visual search (percentage viewing time of areas of interest) differed between deceptive and non-deceptive conditions. This study investigated the effectiveness of using fake visual cues by the penalty taker, and corresponding visual search behaviours. Nine skilled goalkeepers simulated saves of 15 deceptive and 15 non-deceptive 2000ms clips by moving their hands left or right. Deception involved kicker’s gaze direction and approach angle. Deceptive trials had a lower percentage save rate. When two deceptive cues were combined, performance was further impaired. Available data for four participants showed individualised visual search patterns. In conclusion, using deceptive cues by a penalty taker is effective and individualised visual search behaviour was present.

Loneliness and physical activity: A systematic review

ABSTRACT This article aims to provide an overview of the current state of research on the relationship between loneliness and physical activity (PA). A systematic literature search was conducted to identify all empirical studies assessing this relationship. A total of 37 studies stemming from 36 publications met the inclusion criteria. Study analyses comprised an individual consideration of each study and a systematic summarization of the studies. The majority of eligible studies focused on adolescent or elderly populations. Direct negative associations between PA and loneliness were found in half of the 24 cross-sectional studies. Of the seven identified longitudinal studies, one found a direct negative influence of PA on loneliness. Four longitudinal studies found evidence for a reverse influence, namely of loneliness on PA. Five intervention studies found PA to reduce loneliness. Two of the cross-sectional studies and one of the intervention studies found social support and social competence to moderate or to mediate the relationship between PA and loneliness. The findings indicate that PA can contribute to a decrease in loneliness. However, studies also indicate that any beneficial effect is dependent upon the quality of relationships present during physical activity. Additionally, loneliness itself might reduce the probability of being physically active.