Effects of exercise training on resting energy expenditure during caloric restriction.

Resting energy expenditure (REE), maximum oxygen uptake (VO2max), and body composition were measured in seven moderately obese women during 9 wk of dietary restriction (800 kcal/d). During weeks 4-6, subjects underwent exercise training (30 min cycling/d, 5 d/wk, at 70% VO2max). The first 3 wk of caloric restriction decreased REE by 13% (from 1437 +/- 76 to 1254 +/- 66 kcal/24 h, means +/- SEM, p less than 0.05). Exercise training increased VO2max (from 1717 +/- 108 to 1960 +/- 120 mL/min, means +/- SEM, p less than 0.05) but did not elevate the dietary-depressed REE (from 1254 +/- 66 to 1262 +/- 62 kcal/24 h). The greatest decrease in body fat (3.7 +/- 0.4 kg) occurred during exercise training, resulting in a small apparent increase in REE when expressed per kilogram total body weight. However, expressed per unit lean body mass, REE remained suppressed throughout the period of caloric restriction. We conclude that exercise training of sufficient intensity to substantially increase VO2max does not reverse the dietary-induced depression of REE.

Social skills and relapse history in outpatient schizophrenics.

Persons with schizophrenia commonly have impaired social functioning (Wallace 1984). Those with greater impairments, particularly as measured by premorbid social attainment, have a poorer clinical prognosis (Strauss and Carpenter 1972). Interventions designed to improve social competence, such as social skills training, have yielded generalizable and durable effects and may have reduced relapse rates (Wallace and Liberman 1985; Liberman et al. 1986; Hogarty et al. 1986). Thus, a valid measure of social skills should be a useful clinical and research tool. This research explores the validity of a new instrument for measuring such skills, the Assessment of Interpersonal Problem Solving Skills (AIPSS) (Donahoe et al., this issue). The AIPSS differs from more conventional social functioning measures because it 1) utilizes observations of role-playing, rather than self-report or third-party report; 2) provides a rating of the patient's current rather than past functioning; 3) involves videotaped simulated "real life" situations that pose challenges to the patient's ability to solve socially relevant problems; 4) permits assessment of patient's social perception, processing of social information for action planning, and verbal and nonverbal social responses. In this study, we examined the relationship between these parameters of schizophrenic patients' social functioning and their recent relapse history.

Assessment of interpersonal problem-solving skills.

A new instrument for assessing social skills of schizophrenic patients, Assessment of Interpersonal Problem-Solving Skills (AIPSS), is a videotaped-based test with an examiner's administration and scoring manual. The test measures an examinee's ability to describe an interpersonal social problem, to derive a solution to the problem, and to enact a solution in a role-played simulation test. In a study using a sample of schizophrenic outpatients and a comparison group of nonpatients, we found that the test had adequate psychometric properties, and the patients demonstrated deficits on all scales relative to the nonpatients. The results of the study also provided partial support for the validity of an information-processing model of social skills, which was used as a basis for constructing the AIPSS. Thus, the AIPSS represents a departure from previous methods of assessing social skills.

Etiological factors in the development of PTSD in clinical samples of Vietnam combat veterans.

This paper presents a review of empirical literature that deals with etiological factors in combat-related post-traumatic stress disorder (PTSD). Variables implicated in PTSD from three time frames, premilitary, military, and postmilitary, are identified, and findings from relevant research are discussed. There is consistency across studies in showing significant correlations between PTSD and combat exposure and post-military psychosocial adjustment. Less consistent are the findings with regard to relationships between premilitary psychosocial factors and PTSD. Recent findings from studies that have explored possible physiological correlates of PTSD also are discussed. Based on current literature, implications for future research on etiological factors in combat-related PTSD are presented.

Antisocial behavior and post-traumatic stress disorder in Vietnam veterans.

Assessment data from 118 Vietnam-era veterans seeking psychological services at two Los Angeles Veterans Administration Medical Centers were analyzed to examine the potential relationships between number of preadult and adult antisocial behaviors, as defined in the Diagnostic and Statistical Manual of Mental Disorders (DSM-III; American Psychiatric Association, 1980) criteria for antisocial personality disorder, level of combat exposure, and development of combat-related post-traumatic stress disorder (PTSD). Results of hierarchical regression analyses indicated that combat exposure level was related significantly to PTSD symptomatology, whereas number of preadult antisocial behaviors was not. However, both combat exposure level and preadult behaviors, which were not correlated significantly, were related significantly to number of adult antisocial behaviors. There were no significant interaction effects. Results were consistent with a theoretical model of PTSD development that emphasizes the role of trauma vs. premorbid characterological factors. In addition, the significant association between combat exposure and adult antisocial behavior indicates that trauma may play a role in the development and/or maintenance of adult antisocial behaviors observed in some Vietnam veterans.