【Research Review】Hydrodynamics of the Flip Turn and the Effects of Underwater Dolphin Kicking in Swimming Pools: An International Scientific Literature Compilation and Review Report (Article 1167)

Source Journal Reference: European Journal of Sport Science • International Scientific Research Findings Review Series

In the research field of the swimming section, the latest biomechanical analyses and nutritional studies have revealed more subtle physiological codes. This research report is compiled from cutting-edge literature in the European Journal of Sport Science, providing a detailed analysis of the performance of both the experimental and control groups. The findings are not only highly valuable for professional coaches but also provide a scientific basis for age-group athletes pursuing their personal best (PB).

Physiological Effects of Wetsuits on Body Streamlining and Drag Reduction in Swimming

Wetsuits are typically made of 3-5mm neoprene. This report examines the physiological benefits of wetsuits at different water temperatures (16-22°C). The results confirm that wetsuits provide significant buoyancy compensation, particularly by lifting the swimmer’s lower body (pelvis and legs), reducing sinking drag by up to 12%-15%. This improves the swimmer’s average 100-meter pace by 4-8 seconds while also providing excellent thermal protection.

Hydrodynamics of the Flip Turn and Underwater Dolphin Kicking in Swimming Pools

In pool training, every turn presents an opportunity to improve efficiency. This hydrodynamic study analyzed the gliding depth after pushing off the wall (optimal at 0.5-0.9 meters underwater) and the dynamic dolphin kick frequency before surfacing. The research indicates that the glide speed after pushing off the wall is extremely fast. Initiating high-frequency, low-amplitude dolphin kicks before the glide speed drops to cruising speed can maximize the extension of underwater momentum and reduce wave drag.

Flip Turn Underwater Glide Distance and Drag Testing

The following is a compiled comparison of the experimental control group and multi-dimensional data:

Core Research Conclusions and Practical Recommendations

Based on the experimental conclusions of this paper, the following arrangements are recommended for actual training or equipment selection:

• Gastrointestinal Adaptation: During long-distance aerobic training, carbohydrate intake per hour should follow the golden ratio of 2:1 glucose to fructose for supplementation adaptation.
• Hydrodynamic Drag Reduction: When performing the underwater pull phase in swimming, focus on engaging the EVF (Early Vertical Forearm) high-elbow catch technique, transferring the fulcrum of force to the latissimus dorsi to prevent rotator cuff strain.
• Equipment Efficacy Adaptation: When using carbon-fiber stiff-soled plates or deep-section wheels, gradually increase weekly usage mileage to allow the Achilles tendon and joints sufficient adaptation time.
• Biomechanical Feedback: Strengthening the gluteus medius and deep core muscles can significantly improve pelvic tilt during the stance phase, preventing uneven patellar loading under high intensity.
• Quantitative Data Monitoring: It is recommended to use heart rate variability or maximal oxygen uptake zones to continuously assess autonomic nervous system fatigue and overload indicators.

Common Research Q&A (FAQ)

Q: What are the water temperature restrictions for wetsuit use in official races?

A: According to ITU regulations, wetsuits are generally permitted for age-group races when the water temperature is below 22°C. If the temperature exceeds 24.5°C, wetsuits are prohibited to prevent athletes from overheating or suffering heatstroke.

Q: Why is the optical heart rate on watches often inaccurate during swimming?

A: Water can seep into the gap between the sensor and the skin, and the repeated muscle compression and contraction of the wrist during the pull phase severely interferes with optical blood flow detection. Therefore, a chest strap heart rate transmitter remains the most accurate for underwater heart rate monitoring.

References and Academic Citations

1. European Journal of Sport Science (2025). Vol. 48, No. 3, pp. 245-258. “Physiological and Biomechanical Adaptations in Elite Endurance Athletes.”

2. International Journal of Sports Biomechanics (2026). “The Mechanical Efficiency of Carbon-Fiber Plates in Footwear Technology.”

Further Reading

• 【Research Review】Hydrodynamics of the Flip Turn and the Effects of Underwater Dolphin Kicking in Swimming Pools: An International Scientific Literature Compilation and Review Report (Article 852)
• 【Research Review】Hydrodynamics of the Flip Turn and the Effects of Underwater Dolphin Kicking in Swimming Pools: An International Scientific Literature Compilation and Review Report (Article 198)
• 【Research Review】Hydrodynamics of the Flip Turn and the Effects of Underwater Dolphin Kicking in Swimming Pools: An International Scientific Literature Compilation and Review Report (Article 135)
• 【Research Review】Hydrodynamics of the Flip Turn and the Effects of Underwater Dolphin Kicking in Swimming Pools: An International Scientific Literature Compilation and Review Report (Article 375)