Related Experiment Video
Updated: Nov 25, 2025
09:24
A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers
Published on: January 28, 2020
9.2K
Variation in Heart-Rate Profile During a Prolonged, Submaximal Swim Bout.
International Journal of Sports Physiology and Performance
|December 16, 2020
Summary
Heart rate (HR) remained stable during prolonged swimming training, but completion times slowed, indicating fatigue. Individual HR variability suggests caution when using rigid HR zones for training intensity.
Area of Science:
- Sports Medicine
- Exercise Physiology
- Swimming Performance
Background:
- Limited research exists on heart rate (HR) responses during prolonged, submaximal, multirepetition swimming.
- Understanding HR trends is crucial for optimizing early-season training protocols.
Purpose of the Study:
- To characterize the heart rate (HR) response during extended swimming training sessions.
- To analyze trends in HR and completion time (CT) across multiple repetitions.
Main Methods:
- Twelve collegiate swimmers performed sixty 100-yd freestyle repetitions with short rests.
- Heart rate (HR) was continuously monitored using a cardiotachometer.
- Completion time (CT) for each repetition was recorded; statistical analysis used linear mixed models.
Main Results:
- Mean HR was 167.8 bpm, with no significant change across repetitions (P = .97).
- Mean CT was 68.7 seconds, showing a significant increase (3.0 s, P = .001), indicating fatigue.
- High between- and within-subject variability was observed for both HR and CT.
Conclusions:
- Significant individual variability in HR exists among swimmers during training.
- Coaches should exercise caution when prescribing training intensity based solely on rigid HR zones.
Related Concept Videos
01:30Factors Influencing Heart Rate
5.7K
The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
5.7K
01:31Regulation of Heart Rates
3.3K
The regulation of heart rate is a complex process controlled by the autonomic nervous system (ANS), hormonal influences, and intrinsic cardiac mechanisms. The ANS has two main components: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...
3.3K
01:19Cardiac Output I:Effect of Heart Rate on Cardiac Output
2.0K
Cardiac Output
Cardiac output (CO) refers to the total amount of blood ejected by one of the ventricles in liters per minute (L/min). In a resting adult, CO ranges from 5 to 6 L/min, adjusting according to the body's metabolic requirements.
Effect of Heart Rate on Cardiac Output
Cardiac output adapts to metabolic demands during stress, physical activity, or illness. The autonomic nervous system regulates heart rate via the sinoatrial node. The parasympathetic nervous system decreases heart...
Cardiac output (CO) refers to the total amount of blood ejected by one of the ventricles in liters per minute (L/min). In a resting adult, CO ranges from 5 to 6 L/min, adjusting according to the body's metabolic requirements.
Effect of Heart Rate on Cardiac Output
Cardiac output adapts to metabolic demands during stress, physical activity, or illness. The autonomic nervous system regulates heart rate via the sinoatrial node. The parasympathetic nervous system decreases heart...
2.0K
01:17Exercise and Cardiac Output
1.6K
Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
Sustained exercise increases the muscles' oxygen demand, which can be...
Sustained exercise increases the muscles' oxygen demand, which can be...
1.6K
01:20Exercise and Cardiovascular Response
3.6K
Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
3.6K
01:29Dysrhythmias III: Characteristics of Dysrhythmias
267
Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per...
267