Accuracy of reproduction of physical training load is not associated with resting heartbeat perception in healthy individuals.

Previous research demonstrated that individuals are able to reliably reproduce their heart rate under physical load, however, they are prone to underestimate it. It was also assumed that the ability to perceive heartbeats under resting conditions might play a role in the regulation of physical activity. In an experimental setting, 47 young individuals were asked to complete the Schandry task and reproduce three different exercise intensities with respect to heart rate on a treadmill. Resting heartbeat counting was moderately related to replication performance under slight physical load, but not under more intense conditions. In all exercise conditions, participants were prone to underestimate their actual heart rate. No significant gender difference was revealed. Actual and perceived performance were moderately associated at rest, but not under physical load. In conclusion, perception of heartbeats at rest is related to replication of heart rate during physical activity only at very weak physical load.