ECG Changes during Swimming Exercise in Healthy Children and Adults
【Supercategory：7. DESCENTE SPORTS SCIENCE Subcategory：7.7 Vol.7】
The continuous electrocardiogram recordings were made during the swimming exercise for the individuals of the total of 80 people, who were consisted of 40 healthy adults and 40 children (junior high school students).
The study of the heart rate changes and occurrences of arrhythmia at diving into deeper water and ordinally swimming were made from the above ECG recordings.
The summary of the study findings are listed as follows:
1) There was no case which had heart rate change and arrhythmia at the diving in the study group.
2) As the results ECG changes during the diving into deeper water, cases of diving bradycardia were found, which had 50% heart rate reduction in both adult and pediatric cases. Also, there were cases of PVC and sever bradycardia during this exercise.
3) The heart rate change during the ordinary swimming were; The heart rate was increased for one minute from the start of the swimming and stayed at constant after on for the pediatric group. For the adult group, the heart rate was increased for 40 seconds from the start of the swimming and stayed at constant after on.
4) There were large differences of heart rates among the individuals, especially the differences were significantly large in the adult group. Some cases exhibited arrhythmia during the ordinary swimming.
5) Normal values of heart rate change during the swimming exercise were calculated and showed them along the time axis which starts from the beginning of the exercise.
6) Many cases exhibited transit tachycardia when coming out of water after swimming.
We studied cardiological status during the swimming exercise from a view point of sport medicine, however, from a view point of clinical medicine, we found there were some people who were not suitable to do swimming and diving into deeper water even though they are healthy.
From the above study findings, there is a need to record ECG during the swimming in order to provide better health care management, and a further need to establish a system for such management for individual swimmer.
DESCENTE SPORTS SCIENCE Vol.7/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
The study of the heart rate changes and occurrences of arrhythmia at diving into deeper water and ordinally swimming were made from the above ECG recordings.
The summary of the study findings are listed as follows:
1) There was no case which had heart rate change and arrhythmia at the diving in the study group.
2) As the results ECG changes during the diving into deeper water, cases of diving bradycardia were found, which had 50% heart rate reduction in both adult and pediatric cases. Also, there were cases of PVC and sever bradycardia during this exercise.
3) The heart rate change during the ordinary swimming were; The heart rate was increased for one minute from the start of the swimming and stayed at constant after on for the pediatric group. For the adult group, the heart rate was increased for 40 seconds from the start of the swimming and stayed at constant after on.
4) There were large differences of heart rates among the individuals, especially the differences were significantly large in the adult group. Some cases exhibited arrhythmia during the ordinary swimming.
5) Normal values of heart rate change during the swimming exercise were calculated and showed them along the time axis which starts from the beginning of the exercise.
6) Many cases exhibited transit tachycardia when coming out of water after swimming.
We studied cardiological status during the swimming exercise from a view point of sport medicine, however, from a view point of clinical medicine, we found there were some people who were not suitable to do swimming and diving into deeper water even though they are healthy.
From the above study findings, there is a need to record ECG during the swimming in order to provide better health care management, and a further need to establish a system for such management for individual swimmer.
DESCENTE SPORTS SCIENCE Vol.7/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
| Researcher | Toshio Asai, Masato Morita, Makoto Awakura |
|---|---|
| University or institution | Kanazawa Medical University, Department of Pediatrics |
Keywords
electrocardiogram, swimming exercise, heart rate changes, arrhythmia, diving bradycardia