Balancing Quote by Adrian Bejan
“The fact that the same proportionalities rule optimal running, flying and swimming is not a coincidence rather it is an illustration of the fact that a universal principle is involved. Running requires the least food when during each cycle a certain amount of work is destroyed by vertical impact and a certain amount to horizontal friction. The same balancing act is responsible for optimal flight and swimming.”
About This Quote
Source Book: Advanced Engineering Thermodynamics, Adrian Bejan, 2008
The same proportional relationships govern optimal running, flying, and swimming, showing a universal principle of energy balance across locomotion modes.
In simple terms: All three motions follow a common energy‑efficiency rule.
Key Takeaway
Apply the principle of balanced work and friction to improve performance.
Themes
efficiency
physics
biology
design
Mood
analytical
inquisitive
technical
Type
scientific
inspirational
practical
When to use this quote
- Athlete training
- robotic design
- vehicle aerodynamics
- swim technique
- environmental adaptation
Key Concepts
Thermodynamics
energy balance
biomechanics
Questions to Reflect On
- How can this principle be adapted for irregular terrains?
- What limits does real‑world friction impose?
A Different Perspective
The principle may oversimplify complex biological variations and external factors.
