[Research Review] Hydrodynamics of the Pool Flip Turn and the Effects of Underwater Dolphin Kicking: Advances in Sports Physiology Research (No. 1338)

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 the cutting-edge literature of the European Journal of Sport Science, providing a detailed analysis of the performance of subjects in 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 Swim Wetsuits on Body Streamlining and Drag Reduction

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%, improving average 100m pace by 4-8 seconds, while also providing excellent thermal protection.

Hydrodynamics of Pool Turns and Underwater Dolphin Kicking

In pool training, every turn is an opportunity to improve efficiency. This hydrodynamic study analyzed the glide depth after pushing off the wall (optimal at 0.5-0.9m underwater) and the dynamic dolphin kick frequency before surfacing. The research indicates that the push-off glide speed 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.

Pool Flip Turn Underwater Glide Length and Drag Testing

Below is the 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, it is recommended to follow the following arrangements in actual training or equipment selection:

• Equipment Performance Adaptation: When using carbon-fiber rigid plates or deep-section wheels, gradually increase weekly mileage to allow sufficient adaptation time for the Achilles tendon and joints.
• Gastrointestinal Adaptation: During long-distance aerobic training, carbohydrate intake per hour should be adapted using the golden ratio of 2:1 glucose to fructose.
• 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 VO2max zones to continuously assess autonomic nervous system fatigue and overload indicators.

Common Research Q&A (FAQ)

Q: What are the water temperature limits 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 water temperature exceeds 24.5°C, wetsuits are prohibited to prevent overheating and heatstroke.

Q: Why is 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 strokes severely interferes with optical blood flow detection. Therefore, chest strap heart rate monitors remain the most accurate for underwater heart rate measurement.

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 Pool Flip Turn and the Effects of Underwater Dolphin Kicking: Advances in Sports Physiology Research (No. 921)
• 【Research Review】Hydrodynamics of the Pool Flip Turn and the Effects of Underwater Dolphin Kicking: Advances in Sports Physiology Research (No. 411)
• 【Research Review】Hydrodynamics of the Pool Flip Turn and the Effects of Underwater Dolphin Kicking: Advances in Sports Physiology Research (No. 48)
• 【Research Review】Hydrodynamics of the Pool Flip Turn and the Effects of Underwater Dolphin Kicking: Advances in Sports Physiology Research (No. 120)