Thirty-nine healthy adults between 23 and 27 years old participated in a study comparing two types of resistance training. The group performed traditional resistance exercise with heavy weights, while another group used blood flow restriction training with lighter weights and a cuff on the limb. Both groups did four sets of exercises with one minute of rest between them. The researchers measured heart rate variability to see how the heart responded to the workout stress.
The results showed that traditional resistance exercise caused larger changes in heart rate signals than the blood flow restriction method. Specifically, the traditional method led to a bigger drop in high frequency heart rate signals and a bigger rise in low frequency signals. These changes indicate a stronger stress response on the heart and nervous system during the heavy lifting session. The study found no difference in these effects based on whether the participant was a man or a woman.
However, the study looked at a small group of only 39 people. This means the results might not apply to everyone. The researchers did not report any safety issues or side effects during the short workout. While the findings suggest traditional lifting creates more autonomic stress, more research is needed to confirm these patterns in larger groups of people.
