The Effects of Vigorous Exercise on Anxiety, Heart Rate, and Alpha Activity of Runners and Nonrunners

State anxiety, heart rate, and alpha activity of male nonrunners and runners (N=30) during a vigorous run and a quiet reading session were examined. Physical activity was performed at 80–85% age-related maximal exercise heart rate for 20 min; the same subjects participated in a reading condition. Analysis revealed a significant decrease in post-run state anxiety for the runners compared to the nonrunners. No reduction in state anxiety for either group was found after the reading condition. Runners also significantly reduced their heart rate after the run compared to nonrunners. A significant increase in alpha activity for both runners and nonrunners was found after the run compared to the reading condition. These results suggest that post-exercise anxiety and heart rate responses were influenced by level of aerobic conditioning. Furthermore, dissimilar anxiety, heart rate, and alpha responses were found after the reading and exercise conditions.     

Acute Emotional and Cardiovascular Effects of Stressful Mental Work During Aerobic Exercise

The acute effects of engaging in challenging mental work during a single session of aerobic exercise were examined on measures of subjective mood and cardiovascular function. Fifty-seven female subjects were randomly assigned to participate in either a 10-min aerobic exercise condition or a no-exercise control condition. Half of the subjects in each group performed digits backward problems during this time period, and no mental stressors were presented to the other subjects. The results indicated that the exercise and mental stress conditions had additive effects on subjective anxiety levels and on cardiovascular responses during exercise. Both exercise and mental stress increased heart rate. In addition, exercise had anti-anxiety and vasodilative effects, but both of these influences were attenuated by opposing main effects for mental stress exposure. No effects were found for exercise on measures of cardiovascular reactivity to a later digits backward stressor. The results are consistent with previous research in suggesting that exposure to mental stressors during aerobic exercise provides no acute psychological benefits but attenuates some of the mood improvements and vasodilative effects of the exercise activity.     

Maternal trait anxiety and diabetes control in adolescents with type 1 diabetes

OBJECTIVE: To examine the relationship of maternal trait anxiety with diabetes regulation among adolescents with type 1 diabetes. METHODS: Adolescents and their mothers completed surveys assessing trait anxiety, maternal involvement in diabetes care, adolescent management skills, autonomous motivations, mood state, and absenteeism due to diabetes. HbA1c readings, used to assess metabolic control, were obtained from medical records. RESULTS: Trait-anxious mothers reported taking more responsibility for diabetes management tasks and perceived their adolescents as having poorer management skills. Adolescents with high-anxious mothers reported stronger beliefs that their mothers had high control over their diabetes and their parents were over-protective. For younger adolescents, maternal trait anxiety was associated with higher HbA1c levels and greater absenteeism. For older adolescents, maternal trait anxiety was associated with lower autonomous motivations for diabetes care and lower positive affect. CONCLUSIONS: Interventions for adolescents with diabetes may benefit from addressing these maternal anxiety dynamics in ways that improve diabetes control.     

Emotional responsivity during daily life: relationship to psychosocial functioning and ambulatory blood pressure.

Emotional responsivity refers to acute changes in affective states. This study examined the relationship of emotional responsivity during daily life with ambulatory blood pressure (ABP) and psychosocial functioning. Subjects were 162 employed men and women, aged 25-45 years. Subjects underwent 24-h ABP monitoring in which they completed a behavioral diary with each cuff inflation. On a separate day, subjects completed a psychometric test battery including measures of depression, trait anxiety, and social support. Emotional Responsivity, an index of negative emotional variability during waking hours, was operationalized as the standard deviation of each individual's negative emotions scores throughout the day. Individuals with high levels of emotional responsivity showed greater increases in ABP and heart rate (HR) associated with negative emotions. Emotionally responsive individuals also reported less satisfaction with social support and higher levels of perceived daily stress, trait anxiety, and depressive symptoms. These findings suggest that psychosocial traits that have been linked to cardiovascular disease may be associated with more marked cardiovascular activation occurring in response to negative emotions experienced throughout the day.     

Differential effects of state and trait anxiety on heart rate responses and reaction time.

College students were tested on 10 trials of a reaction time task, using a variable interval warning signal, while heart rate was recorded. Subjects were divided into high and low anxiety groups using a median split based on their scores on a modification of the trait scale of the State-Trait Anxiety Inventory. The low anxiety group exhibited faster reaction times, shorter latency heart rate deceleration following warning signal onset, and a more consistent deceleration immediately prior to the respond signal than the high anxiety group. When the same subjects were divided into groups according to state anxiety, no group differences were found in either heart rate or reaction time. In Part II of the study, subjects listened to six 15 s presentations of a 70 dbA, 250 Hz tone. No group differences in heart rate responses to the tones were found for either state or trait anxiety groups.     

P300, N400, aerobic fitness, and maximal aerobic exercise

Electrophysiological effects of aerobic fitness and maximal aerobic exercise were investigated by comparing P300 and N400 before and after a maximal cycling test. Event-related potentials (ERPs) were obtained from 20 students divided into two matched groups defined by their aerobic fitness level (cyclists vs. sedentary subjects). The session of postexercise ERPs was performed immediately after body temperature and heart rate returned to preexercise values. At rest, no significant differences were observed in ERP parameters between cyclists and sedentary subjects. This finding argued against the hypothesis that ERP modifications may be directly assumed by aerobic fitness level. The postexercise session of ERPs showed a significant P300 amplitude increase and a significant P300 latency decrease in all subjects. Similarly, N400 effect increased significantly after the maximal exercise in all subjects. ERP changes were of the same magnitude in the two groups. The present study argues for a general arousing effect of maximal aerobic exercise, independently of the aerobic fitness level.     

Cardiac repolarization properties during standardized exercise test as studied by QT, QT peak and terminated T-wave intervals

Changes in QT, QT peak (QTp) and terminal T-wave, Tp-Te (QT-QTp) were studied in 11 apparently healthy subjects during and after a standardized exercise test. ECG was recorded at scalar lead positions. Averaged complexes were later analysed by computer for the different time intervals. QT and QTp decreased in parallel with increasing heart rate with a ratio QTp/QT of 0.80 +/- 0.02 at rest and 0.74 +/- 0.02 at maximal heart rate around 170. After exercise QT and QTp prolonged disproportionately slower than heart rate, reaching the relation observed during exercise only 9.5 min post exercise. Tp-Te was 75 +/- 10 ms at rest and 65 +/- 8 ms at maximal heart rate. The decrease was significant (P less than 0.001). The main part of the rate-associated shortening of the QT interval occurred in the QTp interval where it was about six to seven times larger than in the Tp-Te interval. In conclusion, QT and QTp decreased similarly with heart rate during exercise. Post exercise there was an initial slower return of these intervals to the resting state than for heart rate. Tp-Te changes were minimal.     

I'm too calm—Let's take a risk! On the impact of state and trait arousal on risk taking

Theories of an optimal level of arousal suggest that underaroused humans seek stimulation to enhance their arousal. One way to increase arousal is risky behavior during gambling. In the current study, we show that the lower the participants' resting arousal, measured via resting heart rate, the riskier they acted in a gamble and the faster they responded, indicating less impulse control. Participants with low resting heart rate also perceived the risk options in the gamble as less arousing and less risky compared to participants with higher resting heart rate. Partial correlations show that resting heart rate, risk behavior, and ratings were interrelated. After physical exercise, participants tended to behave less risky in the gamble compared to a control condition without exercise. Thus, both trait and state arousal effects indicate an inverse relationship of arousal and risky behavior.     

Somatic and Non-Somatic Influences on the Heart: Hemodynamic Changes

Hemodynamic changes in response to two different stressors were obtained and compared in order to determine whether non-somatic influences on the cardiovascular system were similar to somatic influences regardless of the metabolic requirements. Ten subjects participated in three different treatment conditions: a) pre-performance anxiety (a realistic psychological stress condition), b) mild exercise (the physical stress condition), and c) a control (no stress condition). The exercise levels were assigned to elicit heart rates equivalent to those observed during the pre-performance anxiety condition. The cardiac index (CI) for both stressors was significantly increased above control values and even though the exercise condition had a higher predicted metabolic requirement, similar CI values were found in 8 out of 10 subjects. Two subjects classified as labile hypertensive responded with a greater cardiovascular reactivity to the psychological stress than to the physical stress. It appeared that the psychological stress condition evoked a cardiovascular response that was excessive for the metabolic requirements.     

Influence of a brief aerobic training program on heart rate and subjective response to a psychologic stressor

An experiment was conducted to determine whether a brief program of aerobic exercise would reduce the heart rate and subjective responses of high- and low-fit subjects to a psychologic stressor. Thirty-four high-fit and 34 low-fit subjects were exposed to a moderate stressor (recall of digits backwards test) while their heart rates and subjective responses were monitored. Approximately half of the high- and low-fit subjects then participated in a 13-week aerobic exercise training program, whereas the other subjects did not. After the 13-week period, the subjects were again exposed to the stressor. Results indicated that a) in the pretest the low-fit subjects showed a greater heart rate response to the stressor than the high-fit subjects, b) the training program was effective for increasing subjects' levels of aerobic fitness, and c) the training program was effective for reducing the heart rate response to the stressor of low-fit subjects. These findings provide support for the relationship between fitness and the response to psychologic stressors and they suggest that aerobic training may be an effective way of helping low-fit persons deal with psychologic stressors.     

Self-control and its relation to emotions and psychobiology: evidence from a Day Reconstruction Method study

This study aimed to ascertain whether self-control predicts heart rate, heart rate variability, and the cortisol slope, and to determine whether health behaviors and affect patterns mediate these relationships. A sample of 198 adults completed the Self-Control Scale (Tangney in J Pers 72:271–322, 2004), and reported their exercise levels, and cigarette and alcohol use. Participants provided a complete account of their emotional experiences over a full day, along with morning and evening salivary cortisol samples and a continuous measure of cardiovascular activity on the same day. High trait self-control predicted low resting heart rate, high heart rate variability, and a steep cortisol slope. Those with high self-control displayed stable emotional patterns which explained the link between self-control and the cortisol slope. The self-controlled smoked less and this explained their low heart rates. The capacity to sustain stable patterns of affect across diverse contexts may be an important pathway through which self-control relates to psychophysiological functioning and potentially health.     

Interoceptive awareness, anxiety and cardiovascular reactivity to isometric exercise.

The present study was designed to investigate the relation between cardiovascular reactivity, trait anxiety and the interoceptive awareness. Eighteen male subjects underwent a heartbeat perception task and performed an isometric handgrip exercise. Subjects with high reactivity showed a higher degree of interoceptive awareness and trait anxiety suggesting that a habitually increased sympathetic outflow might be one variable contributing to the establishment of high interoceptive awareness and trait anxiety.     

Organizational and individual factors affecting mental health and job satisfaction: a multilevel analysis of job control and personality

This study evaluated variation at the individual and work unit levels in the relations of job control, hostility, and trait anxiety to mental health and job satisfaction. Questionnaire data from a sample of 2,900 employees working at 152 hospital wards were analyzed by means of multilevel regression analyses. Results showed that mental health (General Health Questionnaire-12), varying mainly at the individual level, was explained mostly by hostility and trait anxiety. Job satisfaction varied significantly at the individual and the ward level. Job control accounted for most of this multilevel variation. Thus, this study demonstrated the significance of individual characteristics and organizational effects in explaining the mental health and job satisfaction of employees.     

Coronary-Prone Behavior Pattern, Task Incentive, and Cardiovascular Response

In this experiment it was predicted that the presence or absence of a performance-contingent incentive (monetary reward) would mediate effects of the coronary-prone behavior pattern on behavioral and cardiovascular responses to a difficult cognitive task. Accordingly, 44 subjects of the Type A (coronary-prone) and Type B (non-coronary-prone) behavior patterns were assigned to one of two task conditions, labelled Incentive and No Incentive. Results indicated that under No Incentive Type As performed better at the experimental task and reported less state anxiety than Type Bs, whereas in the Incentive condition, Type A and B subjects showed no differences in task performance or self-report of anxiety. Concerning cardiovascular measures, analysis of variance revealed significantly greater systolic blood pressure and pulse pressure elevations for Type A than Type B subjects, but showed no reliable interactions of the Type A, B and Incentive factors nor any related effects regarding heart rate or diastolic blood pressure. Individual differences in subjects' scores on the inventory for coronary-prone behavior pattern, however, correlated positively with heart rate accelerations in the No Incentive condition, but did not covary with heart rate changes under Incentive. With respect to subjects' perceptions of the task, self-report data suggested that Type As responded in a more active and involved manner and resisted feelings of helplessness to a greater extent than their Type B counterparts.     

Cardiovascular and Metabolic Activity at Rest and During Psychological and Physical Challenge in Normotensives and Subjects With Mildly Elevated Blood Pressure

Heart rate, systolic and diastolic blood pressure, and respiratory and metabolic activity were recorded prior to and during mental arithmetic and a video game task in 20 young men with mildly elevated casual systolic blood pressures. Twenty-five unambiguously normotensive young men were tested under the same protocol. For pretask baseline physiological activity, group differences emerged for all cardiovascular and metabolic variables; thus the elevated blood pressure group displayed not only higher resting cardiovascular levels than normotensive subjects, but higher levels of metabolic activity too. With regard to change in physiological activity from rest to task, the group with mildly elevated blood pressure showed reliably larger increases in heart rate to the mental arithmetic task than the normotensive subjects. These effects, however, were not paralleled by group differences in metabolic activity increase. Physiological measures were also taken prior to and during graded dynamic exercise. The subsequent calculation of individual heart rate-oxygen consumption exercise regression lines allowed the comparison of actual and predicted heart rates during psychological challenge. The subjects with mildly elevated blood pressure displayed significantly greater discrepancies between actual and predicted heart rate values than normotensives during the psychological tasks in general and menta¹ arithmetic in particular. Group differences in physiological activity during exercise largely reflected the pattern seen at rest. A possible exception here was systolic blood pressure. Not only were systolic blood pressure levels higher throughout the exercise phase for mildly elevated blood pressure subjects, but this group evidenced more of an increase from rest to exercise than the normotensives.     

The effect of acute treadmill walking on cognitive control and academic achievement in preadolescent children

The effect of an acute bout of moderate treadmill walking on behavioral and neuroelectric indexes of the cognitive control of attention and applied aspects of cognition involved in school-based academic performance were assessed. A within-subjects design included 20 preadolescent participants (age=9.5±0.5 years; eight female) to assess exercise-induced changes in performance during a modified flanker task and the Wide Range Achievement Test 3. The resting session consisted of cognitive testing followed by a cardiorespiratory fitness assessment to determine aerobic fitness. The exercise session consisted of 20 min of walking on a motor-driven treadmill at 60% of estimated maximum heart rate followed by cognitive testing once heart rate returned to within 10% of pre-exercise levels. Results indicated an improvement in response accuracy, larger P3 amplitude, and better performance on the academic achievement test following aerobic exercise relative to the resting session. Collectively, these findings indicate that single, acute bouts of moderately-intense aerobic exercise (i.e. walking) may improve the cognitive control of attention in preadolescent children, and further support the use of moderate acute exercise as a contributing factor for increasing attention and academic performance. These data suggest that single bouts of exercise affect specific underlying processes that support cognitive health and may be necessary for effective functioning across the lifespan.     

Aerobic Fitness Affects Cardiovascular and Catecholamine Responses to Stressors

Subjects of varying degrees of aerobic fitness were subjected to four laboratory stressors in a test of the hypothesis that aerobic fitness is associated with decreased responsiveness to stressors other than exercise. Blood pressure, heart rate, norepinephrine, epinephrine, and psychological responses to a film of industrial accidents (passive psychological stressor), the Stroop word color task (active psychological stressor), the cold pressor test (passive physical stressor), and running to exhaustion on a treadmill (active physical stressor) were measured. Baseline systolic blood pressure and relative diastolic responses to the film, Stroop task, and exercise were smaller in fit subjects over 40 than in less fit subjects of the same age group. Heart rates were lower in fit subjects at most times, except during and after maximal exercise. Norepinephrine was lower after 9 min of exercise in fit subjects, but was much higher at exhaustion, after these subjects had accomplished more work. Norepinephrine levels fell rapidly and were not different among groups 3 and 10 min after exercise. There was no preferential generalization of the “fitness effect” to the active psychological task.     

Acute Emotional and Psychophysiological Effects of Aerobic Exercise

An experiment was conducted to examine the acute emotional and psychophysiological effects of a single bout of aerobic exercise. Forty active and 40 inactive college students were randomly assigned to an aerobic exercise or a waiting-period control condition. Self-report measures of mood and cardiovascular response measures to challenging cognitive tasks were collected before and after the 20-min exercise/control period to examine any exercise-induced changes. The results indicated that mood was significantly altered by the exercise activity, with reductions in tension and anxiety specifically evident. Exercise was not found to have any effects on cardiovascular reactivity. A test of aerobic fitness confirmed fitness differences between active and inactive participants, but no mood or reactivity effects related to activity status were obtained. These results suggest that both active and inactive individuals experience acute reductions in anxiety following single bouts of exercise, even in the absence of changes in cardiovascular reactivity. Implications for the continued investigation of the acute effects of exercise are discussed.     

The effect of participation in an exercise training program on cardiovascular reactivity in sedentary middle-aged males.

Exaggerated cardiovascular reactivity to mental stressors may be a risk factor for cardiovascular disease. To determine if participation in a moderate intensity aerobic exercise training program reduces cardiovascular reactivity to laboratory stressors, 40 sedentary middle-aged males were randomly assigned: training group (n = 25) and control group (n = 15). Cardiovascular reactivity during and after three mental stressors (passive responding, push-button Stroop and verbal Stroop) and mild exercise (bicycle ergometer) was assessed before and after an 8-week intervention. VO2(peak) was determined using the Balke protocol. Among 19 subjects who completed the training, VO2(peak) increased 13.7%. Also, trained compared to untrained subjects showed significant reductions in baseline and absolute heart rate responses to all stressors. Baseline adjusted heart rates were significantly lower during push-button Stroop recovery and during verbal Stroop. Blood pressure, T-wave amplitude, finger pulse amplitude and pulse transit time responses were unaffected by exercise training. It was concluded that participation in a short-term, moderate intensity aerobic exercise training program may have a cardioprotective effect by significantly reducing absolute and baseline-adjusted heart rate responses to stressors.     

The Effects of Menstrual Cycle Phase on Cardiovascular and Pulmonary Responses to Behavioral and Exercise Stress

The present study was designed to compare the differential cardiopulmonary and hemodynamic responses of Type A and B women to an exercise and a psychological stressor. In addition, the effects of menstrual cycle phase on the resting and response levels of a wide range of physiological variables were explored. Thirty-two women participated in a progressive exercise stress test and a threat of shock video game during both the luteal and follicular phases of the menstrual cycle. Half of these subjects expressed the coronary-prone behavior pattern referred to as Type A, as assessed by the Jenkins Activity Survey. The remaining women were relatively free of these behaviors (Type B). Heart rate, oxygen consumption, carbon dioxide production, minute ventilation, and end-tidal carbon dioxide were monitored and recorded on a breath-by-breath basis. Systolic and diastolic blood pressure measures were taken at 2-min intervals. Results indicated similar baseline, exercise, and behavioral stress responses among Type A and B women. The stress responses were also the same between the follicular and luteal phases for all measured physiological variables. However, resting levels of heart rate, metabolism, and ventilation were all elevated at rest during the luteal phase. A regression analysis based on the exercise heart rate and oxygen consumption data demonstrated that a majority of subjects exhibited heart rate responses in excess of that expected during the psychological stressor. These data are discussed with special reference to possible mechanisms of the pathophysiology of cardiovascular disease.