| 1. |
- Rosato, Aurora, 1998-, et al.
(author)
-
Probability Of Cardiac-Locomotor Coupling During Daily Activities
- 2023
-
Conference paper (other academic/artistic)abstract
- Human locomotion is typically studied independently ofthe cardiovascular system, although the two areintrinsically linked. An example of their interaction iscardiac-locomotor coupling (CLC), which refers to theentrainment of heart rate (HR) and step rate (SR) duringrhythmic exercise at a 1:1 ratio. Actively synchronizingthe stepping with each diastole of the cardiac cycle, hasbeen shown to provide improved cardiometabolicefficiency, demonstrated by a decrease in HR and inventilation [1]. Active CLC can therefore be one way toimprove hemodynamic efficiency, ensuring greaterendurance performances. Previous studies investigatedthe presence of CLC in laboratory settings whereasobservations during daily activities are still lacking. Wedo not know if and when CLC occurs physiologically.The aim of this study is to investigate the extent and theprobability of CLC during unsupervised daily activitiesin contrast to random chance.
|
|
| 2. |
- Rosato, Aurora, 1998-, et al.
(author)
-
Spontaneous Cardiac-Locomotor Coupling in Healthy Individuals During Daily Activities
- 2023
-
In: Proceedings of the 16th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2023). - : INSTICC. ; , s. 170-177
-
Conference paper (peer-reviewed)abstract
- During exercise, the locomotor and the cardiovascular system work in synergy to control the blood flow through the body. In particular, the muscle contraction generates rhythmic raising and lowering of intramuscular pressure, which in synergy supports cardiovascular function. This study aims to analyze spontaneous cardiac-locomotor coupling (CLC) events during daily activities using weareable sensors.We analyze the dataset PMData, containing recordings from sixteen healthy subjects during five months. The data were acquired with a smartwatch and consist of step rate (SR), heart rate (HR) and daily surveys reporting the training sessions. Coupling is defined as being present when SR and HR are within 1% of each other (strong coupling) and within the 10% of each other (weak coupling).The results show that every subject presents occurrences of CLC while performing normal daily activities. In particular, strong coupling occurs more likely for longer activities (111 ± 34 min), at moderate intensity (100 steps/min < SR > 130 steps/min).The presence of CLC during daily activities rises the question whether there is a physiological mechanism controlling this phenomenon, that should be investigated in future.
|
|
| 3. |
|
|
