Miguel A. Diego

Twenty healthy adults were randomly assigned to a moderate pressure or a light pressure massage therapy group, and EKGs were recorded during a 3-min baseline, during the 15-min massage period and during a 3-min postmassage period. EKG data were then used to derive the high frequency (HF), low frequency (LF) components of heart rate variability and the low to high frequency ratio (LF/HF) as noninvasive markers of autonomic nervous system activity. The participants who received the moderate pressure massage exhibited a parasympathetic nervous system response characterized by an increase in HF, suggesting increased vagal efferent activity and a decrease in the LF/HF ratio, suggesting a shift from sympathetic to parasympathetic activity that peaked during the first half of the massage period. On the other hand, those who received the light pressure massage exhibited a sympathetic nervous system response characterized by decreased HF and increased LF/HF.

Aim: To determine whether preterm infant massage leads to consistent increases in vagal activity and gastric motility and whether these increases are associated with greater weight gain.Methods: EKG and EGG were recorded in 80 preterm infants randomly assigned to a moderate pressure massage therapy group or to a standard care control group to assess vagal activity and gastric motility responses to massage therapy.Results: Massaged infants exhibited consistent short‐term increases in vagal activity and gastric motility on both the first and the last days of the 5‐day study that were associated with weight gain during the 5‐day treatment period. No changes in basal vagal activity or gastric motility were noted across the 5‐day treatment period.Conclusion: Preterm infant massage is consistently associated with increases in vagal activity and gastric motility that may underlie the effects of massage therapy on preterm infant weight gain.

Objective: The objective of this study was to examine the effects of maternal psychological distress on estimated fetal weight during midgestation and explore the maternal hypothalamic–pituitary axis and sympathoadrenal dysregulation as potential risk factors for these effects. Methods: Fetal ultrasound biometry measurements and maternal sociodemographic characteristics, emotional distress symptoms, and first morning urine samples were collected during a clinical ultrasound examination for a cross-sectional sample of 98 women who were between 16 and 29 weeks pregnant. Fetal weight was estimated from ultrasound biometry measurements; maternal emotional distress was assessed using the daily hassles (stress), Center for Epidemiologic Studies–Depression (depression), and State-Trait Anxiety Inventory (anxiety) scales; and urine samples were assayed for cortisol and norepinephrine levels. Results: Correlation analyses revealed that both maternal psychological (daily hassles, depression, and anxiety) and biochemical (cortisol and norepinephrine) variables were negatively related to fetal biometry measurements and estimated fetal weight. A structural equation model further revealed that when the independent variance of maternal sociodemographic, psychological distress, and biochemistry measures were accounted for, prenatal cortisol was the only significant predictor of fetal weight. Conclusions: Women exhibiting psychological distress during pregnancy exhibit elevated cortisol levels during midgestation that are in turn related to lower fetal weight. CRH = corticotropin-releasing hormone; HPA = hypothalamic–pituitary axis; IGFBP1 = insulin-like growth factor binding protein 1; eFW = estimated fetal weight; BPD = biparietal diameter; AC = abdominal circumference; FL = femur length; HC = head circumference; SES = socioeconomic status; SEM = structural equation model; CFI = comparative fit index; RMSEA = root mean square error of approximation.