เปรียบเทียบวิธี

	แลคเตทเธรชโฮลด์ (OBLA)	กำลังวิกฤต (Monod)	การฟื้นตัวของอัตราการเต้นของหัวใจ	อัตราส่วนการแลกเปลี่ยนก๊าซในการหายใจ
สาขาวิชา	วิทยาศาสตร์การกีฬา	วิทยาศาสตร์การกีฬา	วิทยาศาสตร์การกีฬา	วิทยาศาสตร์การกีฬา
ตระกูล	Hypothesis test	Hypothesis test	Hypothesis test	Hypothesis test
ปีกำเนิด	1973	1965	1999	1949
ผู้ริเริ่ม	Klaus Wasserman	Henry Monod	Cleveland Clinic Group	J. B. Weir
ประเภท	incremental blood sampling test	power-duration model	exercise recovery test	expired gas analysis
แหล่งต้นตำรับ	Wasserman, K., Whipp, B. J., Koyal, S. N., & Beaver, W. L. (1973). Anaerobic threshold and respiratory gas exchange during exercise. Journal of Applied Physiology, 35(2), 236-243.	Monod, H., & Scherrer, J. (1965). The work capacity of a synergic muscular group. Ergonomics, 8(3), 329-338.	Cole, C. R., Blackstone, E. H., Pashkow, F. J., Snader, C. E., & Lauer, M. S. (1999). Heart-rate recovery immediately after exercise as a predictor of mortality. New England Journal of Medicine, 341(18), 1351-1357.	Weir, J. B. (1949). New methods for calculating metabolic rate with special reference to protein metabolism. Journal of Physiology, 109(1-2), 1-9.
ชื่อเรียกอื่น	OBLA, anaerobic threshold, lactate turnpoint, maximal lactate steady state	CP model, power-duration relationship, anaerobic capacity, critical torque	HRR, heart rate variability recovery, parasympathetic tone, autonomic recovery	RER, respiratory quotient, RQ, substrate oxidation ratio
ที่เกี่ยวข้อง	5	5	5	5
สรุป	Lactate threshold, also termed the onset of blood lactate accumulation (OBLA), is the exercise intensity at which blood lactate concentration increases rapidly and non-linearly. Initially defined by Klaus Wasserman in 1973, the concept describes the physiological transition from aerobic to anaerobic metabolism. As exercise intensity increases, lactate production and clearance remain balanced until a critical threshold is exceeded, after which lactate rapidly accumulates in the blood, signaling a shift toward anaerobic energy pathways. This parameter is crucial in endurance sports and clinical exercise assessment.	Critical power (CP) is the highest power output that can be sustained indefinitely without fatigue, representing the boundary between sustainable and unsustainable exercise. Introduced by Henry Monod and Scherrer in 1965, the critical power model describes the hyperbolic relationship between power output and time-to-exhaustion. The model partitions work capacity into two components: critical power (the aerobic ceiling) and anaerobic work capacity (the maximal work that can be performed above critical power before depletion). This framework is widely used in exercise physiology, sports science, and occupational biomechanics.	Heart rate recovery (HRR) is the decline in heart rate during the first minutes following maximal or submaximal exercise, reflecting the reactivation of parasympathetic (vagal) tone. Introduced as a clinical predictor by Cole and colleagues (1999), HRR serves as a non-invasive biomarker of cardiac autonomic function and overall cardiovascular health. A rapid decline in heart rate after exertion indicates efficient parasympathetic reactivation and healthy autonomic nervous system balance. Conversely, blunted HRR (slow heart rate recovery) is associated with increased mortality risk, autonomic dysfunction, and poor exercise tolerance.	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.