"Population_Type,Age_Range,Sample_Size,Average_TDEE,TDEE_vs_Standard,Measurement_Method,Key_Considerations,Study_Reference,Year"
"Endurance Runners (Training),25-40,42,3000-5000 cal,+40% to +80%,Doubly Labeled Water,High carb needs; recalculate off-season,Sjodin et al.,2004"
"Professional Cyclists (Race Season),22-35,23,4500-6500 cal,+90% to +150%,Doubly Labeled Water,Extreme activity; monitor closely,Westerterp et al.,1986"
"Bodybuilders (Contest Prep),25-40,18,2800-3500 cal,Standard to +20%,Metabolic Chamber,Metabolic adaptation common; reverse diet,Rossow et al.,2013"
"CrossFit Competitors,25-38,31,2800-4200 cal,+20% to +60%,Doubly Labeled Water,High protein needs (1g/lb),Brisola et al.,2021"
"Recreational Gym-Goers (3-4x/week),25-45,89,Standard +10-15%,+10% to +15%,Indirect Calorimetry,Use ""Moderately Active"" multiplier,Thompson et al.,2012"
"Older Adults Age 65-70,65-70,156,Standard -5%,-5% (-100 cal),Doubly Labeled Water,Sarcopenia begins; strength train,Roberts et al.,2005"
"Older Adults Age 70-75,70-75,143,-10%,-10% (-200 cal),Doubly Labeled Water,Monitor protein intake (1g/lb minimum),Roberts et al.,2005"
"Older Adults Age 75-80,75-80,98,-15%,-15% (-300 cal),Doubly Labeled Water,Falls risk with aggressive deficit,Roberts et al.,2005"
"Older Adults Age 80+,80-95,67,-20%,-20% (-400 cal),Doubly Labeled Water,Medical supervision required,Roberts et al.,2005"
"African Descent,18-45,387,-5% to -8%,-5% to -8%,Doubly Labeled Water,Small difference; body comp more important,Luke et al.,2011"
"Asian Descent,18-40,523,-3% to -7%,-3% to -7%,Indirect Calorimetry,Height/frame size often smaller,Hasson et al.,2011"
"Hispanic Descent,18-45,289,-2% to -4%,-2% to -4%,Metabolic Chamber,Within normal variation,Weyer et al.,1999"
"Pregnant Women (2nd Trimester),25-35,78,+300 cal,Standard +15%,Doubly Labeled Water,NOT for dieting; medical supervision only,Butte et al.,2004"
"Pregnant Women (3rd Trimester),25-35,78,+450 cal,Standard +20%,Doubly Labeled Water,NOT for dieting; medical supervision only,Butte et al.,2004"
"Breastfeeding (Exclusive),25-35,92,+500 cal,Standard +25%,Doubly Labeled Water,NOT for dieting; 1800 cal minimum,Butte et al.,2000"
"Post-Bariatric Surgery (0-6 months),30-55,45,Standard -20%,-20%,Indirect Calorimetry,Metabolic adaptation; RD supervision,Faria et al.,2009"
"Post-Bariatric Surgery (6-12 months),30-55,45,Standard -10%,-10%,Indirect Calorimetry,Gradual recovery; monitor closely,Faria et al.,2009"
"Chronic Dieters (3+ years),25-50,67,Standard -8%,-8% (-150 cal),Metabolic Chamber,Adaptive thermogenesis; reverse diet first,Trexler et al.,2014"
"Hypothyroid (Untreated),30-60,34,-15% to -30%,-15% to -30%,Indirect Calorimetry,Medical treatment first; do NOT use calculator,Al-Adsani et al.,1997"
"Hypothyroid (Treated/Stable TSH),30-60,56,Standard to -5%,0% to -5%,Indirect Calorimetry,If TSH normal; calculator OK with monitoring,Al-Adsani et al.,1997"
"PCOS (Polycystic Ovary Syndrome),18-40,89,Standard -5% to -10%,-5% to -10%,Indirect Calorimetry,Insulin resistance component; medical supervision,Szczuko et al.,2021"
"Type 2 Diabetes (Controlled),40-65,123,Standard to -5%,0% to -5%,Indirect Calorimetry,Monitor blood glucose; work with RD,Bitz et al.,2004"
"Wheelchair Users (Sedentary),25-55,45,-15% to -25%,-15% to -25%,Doubly Labeled Water,Use sedentary; adjust based on chair activity,Buchholz et al.,2003"
"Wheelchair Athletes,25-45,28,Standard to +20%,0% to +20%,Doubly Labeled Water,Highly variable by sport,Broad et al.,2016"