Entropic analysis of human body's longevity as a function of physical activity level

Area of Science:

• Thermodynamics
• Biophysics
• Longevity research

Background:

• Existing thermodynamic models for predicting life span and physical activity's effect on longevity are simplified.
• These models paradoxically suggest reduced lifespan with increased activity, contradicting medical advice.
• There's a need to reconcile thermodynamic principles with the known benefits of exercise for longevity.

Purpose of the Study:

• To re-evaluate and confirm previous thermodynamic models of life span and physical activity.
• To develop an improved phenomenological model relating life span, body's specific entropy generation (SEG-life), and physical activity level.
• To propose a modification to the cumulative entropy generation principle based on lifestyle and exercise.

Main Methods:

• Re-presentation and validation of a previous thermodynamic model.
• Formulation of a simplified phenomenological relationship between life span, SEG-life, and physical activity.
• Model validation across diverse individuals.

Main Results:

• The study confirms previous model results, highlighting discrepancies with medical recommendations.
• A new model is proposed that links life span, SEG-life, and physical activity.
• It is suggested that the cumulative entropy generation limit can be relaxed based on lifestyle and exercise.

Conclusions:

• The established thermodynamic models for longevity require refinement.
• Physical activity's impact on longevity is better understood by relaxing the cumulative entropy generation limit.
• This research offers a new perspective on exercise, entropy, and life span prediction.