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. 2024 Jan 16;16(2):271. doi: 10.3390/nu16020271

Table 1.

Resting metabolic rate prediction equations.

Study Sample RMR Prediction Equation (kcal·day−1)
Commonly Used Equations
Harris–Benedict [28] M = 136
F = 103
M: 66.47 + (13.75 × BM) + (5.00 × H) − (6.75 − age)
Cunningham [29] M = 120
F = 103
500 + (22 × FFM)
ten Haaf FFM [23] M = 53
F = 37
484.26 + (22.77 × FFM)
ten Haaf BM [23] M = 53
F = 37
29.28 + (11.94 × BM) + (5.88 × H) − (8.13 × age) + (191.03 × sex (M = 1, F = 0))
Jagim [30] M = 68 M: 775.33 + (19.46 × BM)
Tinsley FFM [14] M = 17
F = 10
284 + (25.9 × FFM)
Tinsley BM [14] M = 17
F = 10
10 + (24.7 × BM)
RU Specific Equations
Mackenzie-Shalders LBM [15] M = 18 24.56 − (29.71 × FFM)
Mackenzie-Shalders BM [15] M = 18 775.32 + (15.95 × BM)
Newly Developed Equations
Posthumus (FFM equation) M = 108 M: 1351.74 + (14.53 × FFM in kg)
Posthumus (BM equation) M = 108 M: 1489.93 + (10.63 × BM in kg)

RMR = resting metabolic rate, M = male, F = female, BM = body mass, H = height, FFM = fat-free mass, RU = rugby union, LBM = lean body mass. Units for these equations are as follows: BM = kg, H = cm, age = years, FFM = kg, LBM = kg.