Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Typical Model Studies01:30

Typical Model Studies

235
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
235
Thin-Walled Hollow Shafts01:15

Thin-Walled Hollow Shafts

159
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution...
159
Rapidly Varying Flow01:24

Rapidly Varying Flow

43
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
43
Modeling and Similitude01:12

Modeling and Similitude

178
Scaled modeling is a fundamental technique in engineering, enabling the study of large and complex systems by creating smaller, manageable replicas that recreate critical characteristics of the original. In hydrology and civil infrastructure, for example, scaled models of dams help analyze water flow, turbulence, and pressure. This method allows for accurate predictions of real-world behavior within a controlled environment, significantly reducing the cost and time involved in full-scale...
178

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Postural stability during low-intensity respiratory loading in pre-COPD and healthy adults: a cross-sectional study.

Archives of physiotherapy·2026
Same author

Effects of Boat Class and Size on Intracycle Velocity Variation During 2000 m Competitive Rowing: A GPS- and Accelerometry-Based Assessment.

Sensors (Basel, Switzerland)·2026
Same author

Male and Female Master Rowers Physiologically Resilient to Repeated Maximal Efforts?

Journal of strength and conditioning research·2026
Same author

Preliminary Study on Piezoelectric Sensor Signals Embedded in Polymeric Samples.

Sensors (Basel, Switzerland)·2026
Same author

Can jerk cost and resultant mechanical impulse be helpful tools to discriminate swimming performance in young swimmers?

Sports biomechanics·2026
Same author

The Impact of Coronary Artery Bypass Grafting on Respiratory Function: A Systematic Review.

Journal of clinical medicine·2026

Related Experiment Video

Updated: May 22, 2025

Swimming Performance Assessment in Fishes
05:12

Swimming Performance Assessment in Fishes

Published on: May 20, 2011

25.5K

Randall Foils Versus Big Blades: Comparative Analysis in On-Water Sprint Rowing.

Ricardo Cardoso1,2, Manoel Rios1,2,3, Filipa Cardoso1,2

  • 1Center of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, Porto, Portugal.

International Journal of Sports Physiology and Performance
|March 12, 2025
PubMed
Summary

Randall foils improved rowing performance in maximal 500-m sprints compared to simple Big blades. This enhancement in rowing speed occurred without significant changes in physiological or metabolic responses, indicating improved efficiency.

Keywords:
bioenergeticsblood lactateheart rateoxygen uptake

More Related Videos

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers
09:24

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers

Published on: January 28, 2020

8.8K
A Swimming-Induced Zebrafish Exercise Apparatus for Versatile Training Approaches
10:34

A Swimming-Induced Zebrafish Exercise Apparatus for Versatile Training Approaches

Published on: October 18, 2024

1.1K

Related Experiment Videos

Last Updated: May 22, 2025

Swimming Performance Assessment in Fishes
05:12

Swimming Performance Assessment in Fishes

Published on: May 20, 2011

25.5K
A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers
09:24

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers

Published on: January 28, 2020

8.8K
A Swimming-Induced Zebrafish Exercise Apparatus for Versatile Training Approaches
10:34

A Swimming-Induced Zebrafish Exercise Apparatus for Versatile Training Approaches

Published on: October 18, 2024

1.1K

Area of Science:

  • Sports Science
  • Biomechanics
  • Exercise Physiology

Background:

  • Rowing performance is influenced by oar blade design.
  • Randall foils and Big blades are common oar types with distinct designs.
  • Evaluating their impact on maximal rowing effort is crucial for optimizing performance.

Purpose of the Study:

  • To compare the technical and energetic impact of Randall foils versus simple Big blades.
  • To assess performance differences during maximal rowing efforts in field conditions.

Main Methods:

  • Fourteen experienced rowers (12 male, 2 female) performed two maximal 500-m rowing bouts.
  • Each rower used both Randall foils and simple Big blades in a randomized order.
  • Performance and physiological variables were continuously measured.

Main Results:

  • Rowing time was significantly shorter with Randall foils (107.59s) compared to Big blades (108.96s).
  • Key physiological variables including oxygen uptake, heart rate, and blood lactate were similar between blade types.
  • The aerobic pathway contributed approximately 50% of energy expenditure regardless of the blade used.

Conclusions:

  • Randall foils enhance rowing performance during maximal sprints.
  • The improved performance with Randall foils does not negatively affect rowers' mechanical or metabolic functions.
  • These findings suggest Randall foils offer a performance advantage in competitive rowing.