เปรียบเทียบวิธี

	อัตราส่วนการแลกเปลี่ยนก๊าซในการหายใจ	Banister TRIMP
สาขาวิชา	วิทยาศาสตร์การกีฬา	วิทยาศาสตร์การกีฬา
ตระกูล	Hypothesis test	Hypothesis test
ปีกำเนิด	1949	1975
ผู้ริเริ่ม	J. B. Weir	Eric Banister
ประเภท	expired gas analysis	mathematical modeling
แหล่งต้นตำรับ	Weir, J. B. (1949). New methods for calculating metabolic rate with special reference to protein metabolism. Journal of Physiology, 109(1-2), 1-9.	Banister, E. W., Calvert, T. W., Savage, M. V., & Bach, T. (1975). A systems model of training responses and its relationship to muscular strength. Transactions of the ASME, 97(3), 177-183.
ชื่อเรียกอื่น	RER, respiratory quotient, RQ, substrate oxidation ratio	TRIMP, training impulse, fitness-fatigue model
ที่เกี่ยวข้อง	5	3
สรุป	The respiratory exchange ratio (RER), also called the respiratory quotient (RQ), is the ratio of carbon dioxide produced to oxygen consumed during metabolism. Introduced by J. B. Weir (1949), RER is a non-invasive indirect measure of substrate utilization—indicating whether the body is primarily oxidizing carbohydrate, fat, or protein. RER values range from approximately 0.7 (pure fat oxidation) to 1.0 (pure carbohydrate oxidation) and higher under anaerobic conditions. By measuring exhaled and inhaled gases during exercise, RER reveals which fuel source predominates at different intensities, providing insights into metabolic flexibility and exercise physiology.	The Training Impulse (TRIMP) model, developed by Eric Banister and colleagues (1975), quantifies the physiological stimulus of a training session by combining duration and intensity. The Banister fitness-fatigue model proposes that training effects on performance follow two opposing dynamics: fitness (beneficial) accumulates with time constant tau_f (~42 days) and fatigue (temporary decrement) accumulates faster but decays quickly (tau_d ~5-10 days). By tracking TRIMP and modeling these two processes, coaches can predict performance trajectories and optimize training load. Although superseded by newer frameworks, the Banister model remains influential and intuitive.