Exertion

Exertion is the physical or perceived use of energy.^[1] Exertion traditionally connotes a strenuous or costly effort, resulting in generation of force, initiation of motion,^[1] or in the performance of work.^[2] It often relates to muscular activity and can be quantified, empirically and by measurable metabolic response.

^ ^a ^b Newton's Third Law, Elert, Glenn. “Forces.” Viscosity – The Physics Hypertextbook, physics.info/newton-first/.
^ Cite error: The named reference :14 was invoked but never defined (see the help page).

[:07-1] Newton's Third Law, Elert, Glenn. “Forces.” Viscosity – The Physics Hypertextbook, physics.info/newton-first/.

[:14-2] Cite error: The named reference :14 was invoked but never defined (see the help page).

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