Related Experiment Video
Updated: Sep 29, 2025
05:12
Swimming Performance Assessment in Fishes
Published on: May 20, 2011
25.7K
Muscle Fatigue and Swimming Efficiency in Behind and Lateral Drafting
Luca Puce1, Karim Chamari2,3, Lucio Marinelli1,4
1Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genoa, Italy.
Frontiers in Physiology
|March 21, 2022
Summary
Drafting behind another swimmer significantly reduces muscle fatigue and increases swimming efficiency. Lateral drafting also offers advantages over free swimming, making drafting a beneficial tactic for swimmers.
Area of Science:
- Sports Science
- Biomechanics
- Physiology
Background:
- Drafting is a common tactic in swimming where athletes swim in the wake of a leader.
- Understanding the physiological and biomechanical effects of drafting is crucial for optimizing performance.
Purpose of the Study:
- To compare the effects of behind drafting (BD) and lateral drafting (LD) versus free swimming (FS) on muscle fatigue, muscle activity, and swimming efficiency.
- To determine the optimal drafting configuration for swimmers.
Main Methods:
- Fifteen swimmers performed three 200m front crawl trials at a controlled pace in BD, LD, and FS conditions.
- Surface electromyography (EMG) and video analysis were used to measure muscle fatigue (Mean Frequency - MNF) and muscle activity (Root Mean Square - RMS) in key muscles.
- Swimming efficiency was assessed using the Stroke Index (SI).
Main Results:
- Behind Drafting (BD) showed the lowest muscle fatigue and highest swimming efficiency (SI).
- Lateral Drafting (LD) also demonstrated reduced muscle fatigue and improved efficiency compared to Free Swimming (FS).
- Significant differences in muscle fatigue and activity were observed across conditions, with notable variations in the latissimus dorsi muscle.
Conclusions:
- Behind Drafting (BD) is the most advantageous swimming configuration, offering reduced muscle fatigue and enhanced swimming efficiency.
- Lateral Drafting (LD) provides benefits over Free Swimming (FS), suggesting drafting tactics are generally advantageous.
- The findings support the strategic use of drafting in competitive swimming to improve performance.
Related Concept Videos
01:24Muscle Recovery and Fatigue
2.8K
Muscle fatigue refers to the decline in a muscle's ability to maintain the force of contraction after prolonged activity. It primarily stems from changes within muscle fibers. Even before experiencing muscle fatigue, one may feel tired and have the urge to stop the activity. This response, known as central fatigue, occurs due to changes in the central nervous system, namely the brain and spinal cord. While there is no single mechanism that induces fatigue, it may serve as a protective...
2.8K
01:27Exercise and Muscle Performance
1.7K
Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
1.7K
01:17Exercise and Cardiac Output
1.4K
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...
1.4K