Sweat lactate response during cycling at 30°C and 18°C WBGT

Sweat lactate reflects eccrine gland metabolism. However, the metabolic tendencies of eccrine glands in a hot versus thermoneutral environment are not well understood. Sixteen male volunteers completed a maximal cycling trial and two 60-min cycling trials [30°C?=?30±1°C and 18°C?=?18±1°C wet bulb globe temperature (WBGT)]. The participants were requested to maintain a cadence of 60 rev?·?min^?1 with the intensity individualized at ～ 90% of the ventilatory threshold. Sweat samples at 10, 20, 30, 40, 50 and 60?min were analysed for lactate concentration. Sweat rate at 30°C (1380±325?ml?·?h^?1) was significantly greater (P<0.05) than at 18°C (632±311?ml?·?h^?1). Sweat lactate concentration was significantly greater (P<0.05) at each time point during the 18°C trial, with values between trials tending to converge across time. During the 30°C trial, both heart rate (20, 30, 40, 50 and 60?min) and rectal temperature (30, 40, 50 and 60?min) were significantly higher than in the 18°C trial. Higher sweat lactate concentrations coupled with lower sweat rates may indicate a greater relative contribution of oxygen-independent metabolism within eccrine glands during exercise at 18°C. Decreases in sweat lactate concentration across time suggest either greater dilution due to greater sweat volume or increased reliance on aerobic metabolism within eccrine glands. The convergence of lactate concentrations between trials may indicate that time-dependent modifications in sweat gland metabolism occur at different rates contingent partially on environmental conditions.     

Adult Attachment,Cognitive Appraisal,and University Students' Reactions to Romantic Infidelity

This study examined the relationships between adult attachment, cognitive appraisal, and university students' behavioral and emotional reactions to infidelity situations in romantic relationships. Results based on 173 university students suggested that both attachment and cognitive appraisals significantly predicted distinct types of infidelity reactions and that participants' cognitive appraisal mediated the effects of attachment on behavioral and emotional reactions. Counseling applications for university counselors are discussed on the basis of attachment perspectives and cognitive appraisal models.     

Adult Attachment; Lesbian,Gay, and Bisexual Identity; and Sexual Attitudes of Nonheterosexual Individuals

Lesbian, gay, and bisexual (LGB) college students from 12 university campuses (N = 177) participated in this study that examined the relationships between adult attachment, LGB identity, and sexual attitudes. Findings indicated that adult attachment was significantly related to LGB identity and sexual attitudes and that an LGB identity variable moderated the relationship between attachment avoidance and sexual permissiveness attitudes. Findings, counseling implications, and future research directions are discussed in terms of attachment and LGB identity theory.     

The Role of Generational Status,Self‐Esteem,Academic Self‐Efficacy,and Perceived Social Support in College Students' Psychological Well‐Being

This study examined the influences of generational status, self‐esteem, academic self‐efficacy, and perceived social support on 367 undergraduate college students' well‐being. Findings showed that 1st‐generation students reported significantly more somatic symptoms and lower levels of academic self‐efficacy than did non‐1st‐generation students. In addition, students' generational status was found to moderate predictive effects of perceived family support on stress. Implications for professional practices, limitations, and directions for future research are discussed.