Heart rate and blood pressure increase during exercise, however, the magnitude differs from one person to another. Genetic difference is an important factor to determine the magnitude, according to a new research. The research shows that receptors found in skeletal muscles can contribute to this different response. Scientists identified that heart rate increase in two common genetic mutations in receptors found in skeletal muscle led to higher blood pressure. The results differed in both groups. The research was conducted by University of Guelph by sample size of 200 healthy young men and women. The findings are published in Journal of physiology.