Scientific studies reveal exercise impacts heart neurons and immune response

Recent scientific research highlights how regular physical activity influences both the nervous and immune systems at a cellular level.

A study published in Autonomic Neuroscience, conducted in the United Kingdom, suggests that aerobic exercise causes structural rearrangements in the neurons that regulate heart function. Using three-dimensional analysis on animal models, researchers observed an asymmetry in these adaptations: neurons on the left side of the body nearly doubled in size, while those on the right side decreased in size. These changes involve the autonomic nervous system and the stellate ganglia, which are critical for regulating heart rate and breathing.

Separately, research involving the Chinese Immune Multi-omics Atlas (CIMA) has demonstrated that systematic exercise reshapes the immune system. By comparing active individuals to those with sedentary lifestyles, scientists found that regular training enhances glucose and lipid metabolism and increases antioxidant levels. Most notably, exercise increases the activity of cytotoxic T-lymphocytes and natural killer (NK) cells, which are essential for identifying and neutralizing pathogens or mutated cells.