Sex-related beneficial effects of exercise on cardiac function and rhythm in autistic rats.

Scientists studied whether exercise could help heart problems in rats with autism-like symptoms. They found that both light and moderate exercise improved heart function and rhythm in these rats. The benefits were different for male and female rats. While this is promising, this research was done in animals, so we don't yet know if the same benefits would occur in autistic children or adults.

This preclinical study examined the cardiovascular effects of exercise in an animal model of autism using valproic acid-induced autism-like symptoms in rats. Researchers tested low-intensity and moderate-intensity endurance exercise over 30 days in both male and female offspring. The study found sex-specific cardiovascular impairments in the autism model, with female rats showing reduced cardiac contractility and males showing altered heart rhythm patterns. Both exercise intensities improved various cardiac function measures and heart rate variability in the autism model animals.

The findings suggest exercise may help address cardiovascular complications associated with autism, though this is preliminary animal research requiring human validation.

While promising, these preclinical findings require human validation before informing clinical practice. The research suggests exercise interventions may benefit cardiovascular health in autism, potentially with sex-specific considerations. Healthcare providers should continue recommending exercise for general health benefits while awaiting human studies.

This is animal research using a chemical model of autism that may not fully represent human autism. Sample sizes are not reported. The study duration was relatively short (30 days). Findings require validation in human studies before clinical application can be considered.

Cardiovascular diseases are prevalent in autistic patients. As exercise is useful in the treatment of medical conditions, this study aimed to identify the effect of low-intensity endurance exercise (LIEE) and moderate-intensity endurance exercise (MIEE) on cardiovascular events in autistic rats. Valproic acid (VPA) was administrated once on gestational day 12.5 to pregnant rats to produce autism-like symptoms in offspring. Thirty-day-old offspring were divided into 12 groups: Male-CTL, Male-VPA, Male-CTL + LIEE, Male-CTL + MIEE, Male-VPA + LIEE, Male-VPA + MIEE, Female-CTL, Female-VPA, Female-CTL + LIEE, Female-CTL + MIEE, Female-VPA + LIEE, and Female-VPA + MIEE.

LIEE and MIEE were performed 5 days a week for 30 days. Twenty-four hours after the last exercise session, electrocardiogram and hemodynamic and cardiac function indices were recorded. The results indicated that +dp/dt max and contractility index (CI) decreased in the Female-VPA group compared to the Female-CTL group. LIEE increased these parameters in the Female-VPA + LIEE group.

However, MIEE normalized CI in the Male-VPA + MIEE compared to the Male-VPA group. Tau increased in the Female-VPA group compared to the Female-CTL group and it decreased in the Female-VPA + MIEE group compared to the Female-VPA group. LIEE and MIEE recovered the reduction of heart rate and the increase in P, R, and T amplitudes in Male-VPA group. LIEE and MIEE increased heart rate variability in the Male-VPA and Female-VPA groups.

The findings showed that LIEE and MIEE alleviated cardiac dysfunction and disturbances in heart rhythm in the autistic offspring. Exercise may be recommended as a routine program for autistic patients to prevent and treat the harmful cardiovascular consequences of autism.