Determination of Physio-Mechanical Equivalence
Adrianus Inu Natalisanto, Rahmiati Munir, Rahmawati Munir, Ahmad Zarkasi, Niken Ari Safitri

Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Mulawarman

Abstract

The heat-mechanical equivalence, namely the ratio between heat and mechanical energy, has been known in the field of thermodynamics and was discovered experimentally by Joule in a physical system, namely 1 calorie is equivalent to 4.184 joules. In this research a similar thing has been carried out, but in the field of biophysics and in the system of human body, namely the determination of the physio-mechanical equivalence by measuring the value of the proportionality constant of physiological energy and biomechanical energy. Physiological energy relates to the energy expended by a person during his activities and is reflected in changes in his heart rate, while biomechanical energy relates to the person^s activity in terms of Newtonian mechanics. In this study, an equation has been derived that relates physiological energy and biomechanical energy in humans, then the physio-mechanical equivalence of the subject doing the bench press movement is calculated using the equation and measurement data on the subject. From this study, the physio-mechanical equivalence of the subject were obtained, namely 1 heart beat is equivalent to 8.591 joules.

Keywords: equivalence, physiological energy, biomechanical energy

Topic: PHYSICAL SCIENCES