Thermal robustness of biomechanical processes.

Area of Science:

• Biomechanics
• Physiology
• Thermal Ecology

Background:

• Temperature significantly impacts physiological processes due to the thermal sensitivity of chemical reactions.
• Animals often evolve endothermy and behavioral thermoregulation to optimize chemical processes by elevating tissue temperature.
• Despite temperature effects on muscle function, many species display movement performance robust to thermal changes.

Purpose of the Study:

• To propose that thermal robustness in movement is a general feature driven by mechanical processes, not solely chemical ones.
• To introduce an analytical framework for identifying thermal robustness by comparing temperature coefficients (Q10 values) of chemical versus mechanical processes.
• To explore diverse biomechanical systems where mechanical processes might confer thermal robustness.

Main Methods:

• Developed an analytical framework comparing temperature coefficients (Q10 values) of chemical and mechanical processes.
• Analyzed studies on recoiling elastic structures as a model for mechanical power in movement.
• Highlighted other biomechanical systems amenable to analysis using the proposed framework.

Main Results:

• Mechanical processes, such as the use of elastic structures, can replace or augment muscle shortening to power movement.
• The proposed framework allows for the detection of thermal robustness by analyzing temperature coefficients.
• Thermally robust movement performance is likely a general feature across diverse organisms and kingdoms.

Conclusions:

• Mechanical processes contribute significantly to thermally robust movement, offering an alternative to temperature-dependent chemical processes.
• The framework aids in understanding how mechanical systems confer thermal robustness in biological movement.
• Studying temperature effects on diverse movements enhances understanding of organismal performance and thermal ecology.