Stiff Leg Deadlift vs Bodyweight Back Extension Strength Standards
Compare your stiff-leg deadlift and bodyweight back extension against strength standards for your sex, age range, and bodyweight. Enter one recent result for each exercise to see your strength levels, next target, and which exercise is the priority.
Use each exercise's canonical input: Total barbell weight for Stiff Leg Deadlift and No external load for Bodyweight Back Extension. Use a raw floor-start stiff-leg deadlift with soft knees, a close bar path, full standing lockout, and a floor reset between reps; use a strict, repeatable bodyweight back extension test using the canonical setup, range, and finish rules. Repetitions are never converted into weight. Each exercise keeps its own measurement type. Age range changes only an exercise whose standards use age.
Stiff Leg Deadlift vs Bodyweight Back Extension Strength Standards by Bodyweight
These tables show the minimum result each exercise needs to reach Novice, Intermediate, Advanced, and Elite. Weight-based standards are shown in pounds and kilograms. Direct-performance standards remain strict repetitions or seconds and show every applicable age range.
Find your bodyweight in the men’s or women’s table, then read across the strength levels. Results measured in weight, repetitions, or seconds are not meant to match and are never converted into one another. Use the calculator for your exact inputs and a direct comparison of the strength levels.
Men’s Stiff-Leg Deadlift vs Bodyweight Back Extension Standards
How to read the table: Each table entry lists the minimum result for both exercises. Weight-based targets show pounds and kilograms; direct-performance targets show strict repetitions or seconds for each age range. Scroll horizontally on smaller screens.
| Bodyweight | Novice | Intermediate | Advanced | Elite |
|---|---|---|---|---|
| 120 lb 54.4 kg | Stiff-Leg Deadlift:91 lb41.3 kg Bodyweight Back Extension:Under 30: 12 reps30–39: 11 reps40–49: 10 reps50–59: 8 reps60+: 6 reps | Stiff-Leg Deadlift:116 lb52.6 kg Bodyweight Back Extension:Under 30: 30 reps30–39: 27 reps40–49: 24 reps50–59: 20 reps60+: 15 reps | Stiff-Leg Deadlift:160 lb72.6 kg Bodyweight Back Extension:Under 30: 55 reps30–39: 50 reps40–49: 44 reps50–59: 36 reps60+: 28 reps | Stiff-Leg Deadlift:205 lb93 kg Bodyweight Back Extension:Under 30: 85 reps30–39: 77 reps40–49: 68 reps50–59: 55 reps60+: 43 reps |
| 130 lb 59 kg | Stiff-Leg Deadlift:96 lb43.5 kg Bodyweight Back Extension:Under 30: 12 reps30–39: 11 reps40–49: 10 reps50–59: 8 reps60+: 6 reps | Stiff-Leg Deadlift:123 lb55.8 kg Bodyweight Back Extension:Under 30: 30 reps30–39: 27 reps40–49: 24 reps50–59: 20 reps60+: 15 reps | Stiff-Leg Deadlift:169 lb76.7 kg Bodyweight Back Extension:Under 30: 55 reps30–39: 50 reps40–49: 44 reps50–59: 36 reps60+: 28 reps | Stiff-Leg Deadlift:217 lb98.4 kg Bodyweight Back Extension:Under 30: 85 reps30–39: 77 reps40–49: 68 reps50–59: 55 reps60+: 43 reps |
| 140 lb 63.5 kg | Stiff-Leg Deadlift:101 lb45.8 kg Bodyweight Back Extension:Under 30: 12 reps30–39: 11 reps40–49: 10 reps50–59: 8 reps60+: 6 reps | Stiff-Leg Deadlift:129 lb58.5 kg Bodyweight Back Extension:Under 30: 30 reps30–39: 27 reps40–49: 24 reps50–59: 20 reps60+: 15 reps | Stiff-Leg Deadlift:178 lb80.7 kg Bodyweight Back Extension:Under 30: 55 reps30–39: 50 reps40–49: 44 reps50–59: 36 reps60+: 28 reps | Stiff-Leg Deadlift:228 lb103.4 kg Bodyweight Back Extension:Under 30: 85 reps30–39: 77 reps40–49: 68 reps50–59: 55 reps60+: 43 reps |
| 150 lb 68 kg | Stiff-Leg Deadlift:106 lb48.1 kg Bodyweight Back Extension:Under 30: 10 reps30–39: 9 reps40–49: 8 reps50–59: 7 reps60+: 5 reps | Stiff-Leg Deadlift:135 lb61.2 kg Bodyweight Back Extension:Under 30: 25 reps30–39: 23 reps40–49: 20 reps50–59: 16 reps60+: 13 reps | Stiff-Leg Deadlift:186 lb84.4 kg Bodyweight Back Extension:Under 30: 46 reps30–39: 41 reps40–49: 37 reps50–59: 30 reps60+: 23 reps | Stiff-Leg Deadlift:238 lb108 kg Bodyweight Back Extension:Under 30: 72 reps30–39: 65 reps40–49: 58 reps50–59: 47 reps60+: 36 reps |
| 160 lb 72.6 kg | Stiff-Leg Deadlift:111 lb50.3 kg Bodyweight Back Extension:Under 30: 10 reps30–39: 9 reps40–49: 8 reps50–59: 7 reps60+: 5 reps | Stiff-Leg Deadlift:141 lb64 kg Bodyweight Back Extension:Under 30: 25 reps30–39: 23 reps40–49: 20 reps50–59: 16 reps60+: 13 reps | Stiff-Leg Deadlift:194 lb88 kg Bodyweight Back Extension:Under 30: 46 reps30–39: 41 reps40–49: 37 reps50–59: 30 reps60+: 23 reps | Stiff-Leg Deadlift:249 lb112.9 kg Bodyweight Back Extension:Under 30: 72 reps30–39: 65 reps40–49: 58 reps50–59: 47 reps60+: 36 reps |
| 170 lb 77.1 kg | Stiff-Leg Deadlift:115 lb52.2 kg Bodyweight Back Extension:Under 30: 10 reps30–39: 9 reps40–49: 8 reps50–59: 7 reps60+: 5 reps | Stiff-Leg Deadlift:147 lb66.7 kg Bodyweight Back Extension:Under 30: 25 reps30–39: 23 reps40–49: 20 reps50–59: 16 reps60+: 13 reps | Stiff-Leg Deadlift:202 lb91.6 kg Bodyweight Back Extension:Under 30: 46 reps30–39: 41 reps40–49: 37 reps50–59: 30 reps60+: 23 reps | Stiff-Leg Deadlift:259 lb117.5 kg Bodyweight Back Extension:Under 30: 72 reps30–39: 65 reps40–49: 58 reps50–59: 47 reps60+: 36 reps |
| 180 lb 81.6 kg | Stiff-Leg Deadlift:120 lb54.4 kg Bodyweight Back Extension:Under 30: 10 reps30–39: 9 reps40–49: 8 reps50–59: 7 reps60+: 5 reps | Stiff-Leg Deadlift:152 lb68.9 kg Bodyweight Back Extension:Under 30: 25 reps30–39: 23 reps40–49: 20 reps50–59: 16 reps60+: 13 reps | Stiff-Leg Deadlift:210 lb95.3 kg Bodyweight Back Extension:Under 30: 46 reps30–39: 41 reps40–49: 37 reps50–59: 30 reps60+: 23 reps | Stiff-Leg Deadlift:269 lb122 kg Bodyweight Back Extension:Under 30: 72 reps30–39: 65 reps40–49: 58 reps50–59: 47 reps60+: 36 reps |
| 190 lb 86.2 kg | Stiff-Leg Deadlift:124 lb56.2 kg Bodyweight Back Extension:Under 30: 10 reps30–39: 9 reps40–49: 8 reps50–59: 7 reps60+: 5 reps | Stiff-Leg Deadlift:158 lb71.7 kg Bodyweight Back Extension:Under 30: 25 reps30–39: 23 reps40–49: 20 reps50–59: 16 reps60+: 13 reps | Stiff-Leg Deadlift:218 lb98.9 kg Bodyweight Back Extension:Under 30: 46 reps30–39: 41 reps40–49: 37 reps50–59: 30 reps60+: 23 reps | Stiff-Leg Deadlift:279 lb126.6 kg Bodyweight Back Extension:Under 30: 72 reps30–39: 65 reps40–49: 58 reps50–59: 47 reps60+: 36 reps |
| 200 lb 90.7 kg | Stiff-Leg Deadlift:128 lb58.1 kg Bodyweight Back Extension:Under 30: 8 reps30–39: 7 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:163 lb73.9 kg Bodyweight Back Extension:Under 30: 20 reps30–39: 18 reps40–49: 16 reps50–59: 13 reps60+: 10 reps | Stiff-Leg Deadlift:226 lb102.5 kg Bodyweight Back Extension:Under 30: 38 reps30–39: 34 reps40–49: 30 reps50–59: 25 reps60+: 19 reps | Stiff-Leg Deadlift:289 lb131.1 kg Bodyweight Back Extension:Under 30: 60 reps30–39: 54 reps40–49: 48 reps50–59: 39 reps60+: 30 reps |
| 210 lb 95.3 kg | Stiff-Leg Deadlift:133 lb60.3 kg Bodyweight Back Extension:Under 30: 8 reps30–39: 7 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:169 lb76.7 kg Bodyweight Back Extension:Under 30: 20 reps30–39: 18 reps40–49: 16 reps50–59: 13 reps60+: 10 reps | Stiff-Leg Deadlift:233 lb105.7 kg Bodyweight Back Extension:Under 30: 38 reps30–39: 34 reps40–49: 30 reps50–59: 25 reps60+: 19 reps | Stiff-Leg Deadlift:298 lb135.2 kg Bodyweight Back Extension:Under 30: 60 reps30–39: 54 reps40–49: 48 reps50–59: 39 reps60+: 30 reps |
| 220 lb 99.8 kg | Stiff-Leg Deadlift:137 lb62.1 kg Bodyweight Back Extension:Under 30: 8 reps30–39: 7 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:174 lb78.9 kg Bodyweight Back Extension:Under 30: 20 reps30–39: 18 reps40–49: 16 reps50–59: 13 reps60+: 10 reps | Stiff-Leg Deadlift:240 lb108.9 kg Bodyweight Back Extension:Under 30: 38 reps30–39: 34 reps40–49: 30 reps50–59: 25 reps60+: 19 reps | Stiff-Leg Deadlift:308 lb139.7 kg Bodyweight Back Extension:Under 30: 60 reps30–39: 54 reps40–49: 48 reps50–59: 39 reps60+: 30 reps |
| 230 lb 104.3 kg | Stiff-Leg Deadlift:141 lb64 kg Bodyweight Back Extension:Under 30: 8 reps30–39: 7 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:179 lb81.2 kg Bodyweight Back Extension:Under 30: 20 reps30–39: 18 reps40–49: 16 reps50–59: 13 reps60+: 10 reps | Stiff-Leg Deadlift:248 lb112.5 kg Bodyweight Back Extension:Under 30: 38 reps30–39: 34 reps40–49: 30 reps50–59: 25 reps60+: 19 reps | Stiff-Leg Deadlift:317 lb143.8 kg Bodyweight Back Extension:Under 30: 60 reps30–39: 54 reps40–49: 48 reps50–59: 39 reps60+: 30 reps |
| 240 lb 108.9 kg | Stiff-Leg Deadlift:145 lb65.8 kg Bodyweight Back Extension:Under 30: 8 reps30–39: 7 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:185 lb83.9 kg Bodyweight Back Extension:Under 30: 20 reps30–39: 18 reps40–49: 16 reps50–59: 13 reps60+: 10 reps | Stiff-Leg Deadlift:255 lb115.7 kg Bodyweight Back Extension:Under 30: 38 reps30–39: 34 reps40–49: 30 reps50–59: 25 reps60+: 19 reps | Stiff-Leg Deadlift:326 lb147.9 kg Bodyweight Back Extension:Under 30: 60 reps30–39: 54 reps40–49: 48 reps50–59: 39 reps60+: 30 reps |
| 250 lb 113.4 kg | Stiff-Leg Deadlift:149 lb67.6 kg Bodyweight Back Extension:Under 30: 8 reps30–39: 7 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:190 lb86.2 kg Bodyweight Back Extension:Under 30: 20 reps30–39: 18 reps40–49: 16 reps50–59: 13 reps60+: 10 reps | Stiff-Leg Deadlift:262 lb118.8 kg Bodyweight Back Extension:Under 30: 38 reps30–39: 34 reps40–49: 30 reps50–59: 25 reps60+: 19 reps | Stiff-Leg Deadlift:335 lb152 kg Bodyweight Back Extension:Under 30: 60 reps30–39: 54 reps40–49: 48 reps50–59: 39 reps60+: 30 reps |
| 260 lb 117.9 kg | Stiff-Leg Deadlift:153 lb69.4 kg Bodyweight Back Extension:Under 30: 8 reps30–39: 7 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:195 lb88.5 kg Bodyweight Back Extension:Under 30: 20 reps30–39: 18 reps40–49: 16 reps50–59: 13 reps60+: 10 reps | Stiff-Leg Deadlift:269 lb122 kg Bodyweight Back Extension:Under 30: 38 reps30–39: 34 reps40–49: 30 reps50–59: 25 reps60+: 19 reps | Stiff-Leg Deadlift:344 lb156 kg Bodyweight Back Extension:Under 30: 60 reps30–39: 54 reps40–49: 48 reps50–59: 39 reps60+: 30 reps |
| 270 lb 122.5 kg | Stiff-Leg Deadlift:157 lb71.2 kg Bodyweight Back Extension:Under 30: 8 reps30–39: 7 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:200 lb90.7 kg Bodyweight Back Extension:Under 30: 20 reps30–39: 18 reps40–49: 16 reps50–59: 13 reps60+: 10 reps | Stiff-Leg Deadlift:276 lb125.2 kg Bodyweight Back Extension:Under 30: 38 reps30–39: 34 reps40–49: 30 reps50–59: 25 reps60+: 19 reps | Stiff-Leg Deadlift:353 lb160.1 kg Bodyweight Back Extension:Under 30: 60 reps30–39: 54 reps40–49: 48 reps50–59: 39 reps60+: 30 reps |
| 280 lb 127 kg | Stiff-Leg Deadlift:161 lb73 kg Bodyweight Back Extension:Under 30: 8 reps30–39: 7 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:205 lb93 kg Bodyweight Back Extension:Under 30: 20 reps30–39: 18 reps40–49: 16 reps50–59: 13 reps60+: 10 reps | Stiff-Leg Deadlift:282 lb127.9 kg Bodyweight Back Extension:Under 30: 38 reps30–39: 34 reps40–49: 30 reps50–59: 25 reps60+: 19 reps | Stiff-Leg Deadlift:361 lb163.7 kg Bodyweight Back Extension:Under 30: 60 reps30–39: 54 reps40–49: 48 reps50–59: 39 reps60+: 30 reps |
| 290 lb 131.5 kg | Stiff-Leg Deadlift:164 lb74.4 kg Bodyweight Back Extension:Under 30: 8 reps30–39: 7 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:209 lb94.8 kg Bodyweight Back Extension:Under 30: 20 reps30–39: 18 reps40–49: 16 reps50–59: 13 reps60+: 10 reps | Stiff-Leg Deadlift:289 lb131.1 kg Bodyweight Back Extension:Under 30: 38 reps30–39: 34 reps40–49: 30 reps50–59: 25 reps60+: 19 reps | Stiff-Leg Deadlift:370 lb167.8 kg Bodyweight Back Extension:Under 30: 60 reps30–39: 54 reps40–49: 48 reps50–59: 39 reps60+: 30 reps |
| 300 lb 136.1 kg | Stiff-Leg Deadlift:168 lb76.2 kg Bodyweight Back Extension:Under 30: 8 reps30–39: 7 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:214 lb97.1 kg Bodyweight Back Extension:Under 30: 20 reps30–39: 18 reps40–49: 16 reps50–59: 13 reps60+: 10 reps | Stiff-Leg Deadlift:296 lb134.3 kg Bodyweight Back Extension:Under 30: 38 reps30–39: 34 reps40–49: 30 reps50–59: 25 reps60+: 19 reps | Stiff-Leg Deadlift:378 lb171.5 kg Bodyweight Back Extension:Under 30: 60 reps30–39: 54 reps40–49: 48 reps50–59: 39 reps60+: 30 reps |
Women’s Stiff-Leg Deadlift vs Bodyweight Back Extension Standards
How to read the table: Each table entry lists the minimum result for both exercises. Weight-based targets show pounds and kilograms; direct-performance targets show strict repetitions or seconds for each age range. Scroll horizontally on smaller screens.
| Bodyweight | Novice | Intermediate | Advanced | Elite |
|---|---|---|---|---|
| 100 lb 45.4 kg | Stiff-Leg Deadlift:53 lb24 kg Bodyweight Back Extension:Under 30: 11 reps30–39: 10 reps40–49: 9 reps50–59: 7 reps60+: 6 reps | Stiff-Leg Deadlift:69 lb31.3 kg Bodyweight Back Extension:Under 30: 28 reps30–39: 25 reps40–49: 22 reps50–59: 18 reps60+: 14 reps | Stiff-Leg Deadlift:95 lb43.1 kg Bodyweight Back Extension:Under 30: 50 reps30–39: 45 reps40–49: 40 reps50–59: 33 reps60+: 25 reps | Stiff-Leg Deadlift:126 lb57.2 kg Bodyweight Back Extension:Under 30: 78 reps30–39: 70 reps40–49: 62 reps50–59: 51 reps60+: 39 reps |
| 110 lb 49.9 kg | Stiff-Leg Deadlift:56 lb25.4 kg Bodyweight Back Extension:Under 30: 11 reps30–39: 10 reps40–49: 9 reps50–59: 7 reps60+: 6 reps | Stiff-Leg Deadlift:73 lb33.1 kg Bodyweight Back Extension:Under 30: 28 reps30–39: 25 reps40–49: 22 reps50–59: 18 reps60+: 14 reps | Stiff-Leg Deadlift:102 lb46.3 kg Bodyweight Back Extension:Under 30: 50 reps30–39: 45 reps40–49: 40 reps50–59: 33 reps60+: 25 reps | Stiff-Leg Deadlift:134 lb60.8 kg Bodyweight Back Extension:Under 30: 78 reps30–39: 70 reps40–49: 62 reps50–59: 51 reps60+: 39 reps |
| 120 lb 54.4 kg | Stiff-Leg Deadlift:59 lb26.8 kg Bodyweight Back Extension:Under 30: 9 reps30–39: 8 reps40–49: 7 reps50–59: 6 reps60+: 5 reps | Stiff-Leg Deadlift:78 lb35.4 kg Bodyweight Back Extension:Under 30: 23 reps30–39: 21 reps40–49: 18 reps50–59: 15 reps60+: 12 reps | Stiff-Leg Deadlift:108 lb49 kg Bodyweight Back Extension:Under 30: 42 reps30–39: 38 reps40–49: 34 reps50–59: 27 reps60+: 21 reps | Stiff-Leg Deadlift:142 lb64.4 kg Bodyweight Back Extension:Under 30: 66 reps30–39: 59 reps40–49: 53 reps50–59: 43 reps60+: 33 reps |
| 130 lb 59 kg | Stiff-Leg Deadlift:63 lb28.6 kg Bodyweight Back Extension:Under 30: 9 reps30–39: 8 reps40–49: 7 reps50–59: 6 reps60+: 5 reps | Stiff-Leg Deadlift:82 lb37.2 kg Bodyweight Back Extension:Under 30: 23 reps30–39: 21 reps40–49: 18 reps50–59: 15 reps60+: 12 reps | Stiff-Leg Deadlift:114 lb51.7 kg Bodyweight Back Extension:Under 30: 42 reps30–39: 38 reps40–49: 34 reps50–59: 27 reps60+: 21 reps | Stiff-Leg Deadlift:150 lb68 kg Bodyweight Back Extension:Under 30: 66 reps30–39: 59 reps40–49: 53 reps50–59: 43 reps60+: 33 reps |
| 140 lb 63.5 kg | Stiff-Leg Deadlift:66 lb29.9 kg Bodyweight Back Extension:Under 30: 9 reps30–39: 8 reps40–49: 7 reps50–59: 6 reps60+: 5 reps | Stiff-Leg Deadlift:86 lb39 kg Bodyweight Back Extension:Under 30: 23 reps30–39: 21 reps40–49: 18 reps50–59: 15 reps60+: 12 reps | Stiff-Leg Deadlift:119 lb54 kg Bodyweight Back Extension:Under 30: 42 reps30–39: 38 reps40–49: 34 reps50–59: 27 reps60+: 21 reps | Stiff-Leg Deadlift:158 lb71.7 kg Bodyweight Back Extension:Under 30: 66 reps30–39: 59 reps40–49: 53 reps50–59: 43 reps60+: 33 reps |
| 150 lb 68 kg | Stiff-Leg Deadlift:69 lb31.3 kg Bodyweight Back Extension:Under 30: 9 reps30–39: 8 reps40–49: 7 reps50–59: 6 reps60+: 5 reps | Stiff-Leg Deadlift:90 lb40.8 kg Bodyweight Back Extension:Under 30: 23 reps30–39: 21 reps40–49: 18 reps50–59: 15 reps60+: 12 reps | Stiff-Leg Deadlift:125 lb56.7 kg Bodyweight Back Extension:Under 30: 42 reps30–39: 38 reps40–49: 34 reps50–59: 27 reps60+: 21 reps | Stiff-Leg Deadlift:165 lb74.8 kg Bodyweight Back Extension:Under 30: 66 reps30–39: 59 reps40–49: 53 reps50–59: 43 reps60+: 33 reps |
| 160 lb 72.6 kg | Stiff-Leg Deadlift:72 lb32.7 kg Bodyweight Back Extension:Under 30: 7 reps30–39: 6 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:94 lb42.6 kg Bodyweight Back Extension:Under 30: 18 reps30–39: 16 reps40–49: 14 reps50–59: 12 reps60+: 9 reps | Stiff-Leg Deadlift:130 lb59 kg Bodyweight Back Extension:Under 30: 34 reps30–39: 31 reps40–49: 27 reps50–59: 22 reps60+: 17 reps | Stiff-Leg Deadlift:172 lb78 kg Bodyweight Back Extension:Under 30: 54 reps30–39: 49 reps40–49: 43 reps50–59: 35 reps60+: 27 reps |
| 170 lb 77.1 kg | Stiff-Leg Deadlift:75 lb34 kg Bodyweight Back Extension:Under 30: 7 reps30–39: 6 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:98 lb44.5 kg Bodyweight Back Extension:Under 30: 18 reps30–39: 16 reps40–49: 14 reps50–59: 12 reps60+: 9 reps | Stiff-Leg Deadlift:136 lb61.7 kg Bodyweight Back Extension:Under 30: 34 reps30–39: 31 reps40–49: 27 reps50–59: 22 reps60+: 17 reps | Stiff-Leg Deadlift:179 lb81.2 kg Bodyweight Back Extension:Under 30: 54 reps30–39: 49 reps40–49: 43 reps50–59: 35 reps60+: 27 reps |
| 180 lb 81.6 kg | Stiff-Leg Deadlift:78 lb35.4 kg Bodyweight Back Extension:Under 30: 7 reps30–39: 6 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:102 lb46.3 kg Bodyweight Back Extension:Under 30: 18 reps30–39: 16 reps40–49: 14 reps50–59: 12 reps60+: 9 reps | Stiff-Leg Deadlift:141 lb64 kg Bodyweight Back Extension:Under 30: 34 reps30–39: 31 reps40–49: 27 reps50–59: 22 reps60+: 17 reps | Stiff-Leg Deadlift:186 lb84.4 kg Bodyweight Back Extension:Under 30: 54 reps30–39: 49 reps40–49: 43 reps50–59: 35 reps60+: 27 reps |
| 190 lb 86.2 kg | Stiff-Leg Deadlift:81 lb36.7 kg Bodyweight Back Extension:Under 30: 7 reps30–39: 6 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:105 lb47.6 kg Bodyweight Back Extension:Under 30: 18 reps30–39: 16 reps40–49: 14 reps50–59: 12 reps60+: 9 reps | Stiff-Leg Deadlift:146 lb66.2 kg Bodyweight Back Extension:Under 30: 34 reps30–39: 31 reps40–49: 27 reps50–59: 22 reps60+: 17 reps | Stiff-Leg Deadlift:193 lb87.5 kg Bodyweight Back Extension:Under 30: 54 reps30–39: 49 reps40–49: 43 reps50–59: 35 reps60+: 27 reps |
| 200 lb 90.7 kg | Stiff-Leg Deadlift:84 lb38.1 kg Bodyweight Back Extension:Under 30: 7 reps30–39: 6 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:109 lb49.4 kg Bodyweight Back Extension:Under 30: 18 reps30–39: 16 reps40–49: 14 reps50–59: 12 reps60+: 9 reps | Stiff-Leg Deadlift:151 lb68.5 kg Bodyweight Back Extension:Under 30: 34 reps30–39: 31 reps40–49: 27 reps50–59: 22 reps60+: 17 reps | Stiff-Leg Deadlift:200 lb90.7 kg Bodyweight Back Extension:Under 30: 54 reps30–39: 49 reps40–49: 43 reps50–59: 35 reps60+: 27 reps |
| 210 lb 95.3 kg | Stiff-Leg Deadlift:86 lb39 kg Bodyweight Back Extension:Under 30: 7 reps30–39: 6 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:113 lb51.3 kg Bodyweight Back Extension:Under 30: 18 reps30–39: 16 reps40–49: 14 reps50–59: 12 reps60+: 9 reps | Stiff-Leg Deadlift:156 lb70.8 kg Bodyweight Back Extension:Under 30: 34 reps30–39: 31 reps40–49: 27 reps50–59: 22 reps60+: 17 reps | Stiff-Leg Deadlift:206 lb93.4 kg Bodyweight Back Extension:Under 30: 54 reps30–39: 49 reps40–49: 43 reps50–59: 35 reps60+: 27 reps |
| 220 lb 99.8 kg | Stiff-Leg Deadlift:89 lb40.4 kg Bodyweight Back Extension:Under 30: 7 reps30–39: 6 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:116 lb52.6 kg Bodyweight Back Extension:Under 30: 18 reps30–39: 16 reps40–49: 14 reps50–59: 12 reps60+: 9 reps | Stiff-Leg Deadlift:161 lb73 kg Bodyweight Back Extension:Under 30: 34 reps30–39: 31 reps40–49: 27 reps50–59: 22 reps60+: 17 reps | Stiff-Leg Deadlift:213 lb96.6 kg Bodyweight Back Extension:Under 30: 54 reps30–39: 49 reps40–49: 43 reps50–59: 35 reps60+: 27 reps |
| 230 lb 104.3 kg | Stiff-Leg Deadlift:92 lb41.7 kg Bodyweight Back Extension:Under 30: 7 reps30–39: 6 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:120 lb54.4 kg Bodyweight Back Extension:Under 30: 18 reps30–39: 16 reps40–49: 14 reps50–59: 12 reps60+: 9 reps | Stiff-Leg Deadlift:166 lb75.3 kg Bodyweight Back Extension:Under 30: 34 reps30–39: 31 reps40–49: 27 reps50–59: 22 reps60+: 17 reps | Stiff-Leg Deadlift:219 lb99.3 kg Bodyweight Back Extension:Under 30: 54 reps30–39: 49 reps40–49: 43 reps50–59: 35 reps60+: 27 reps |
| 240 lb 108.9 kg | Stiff-Leg Deadlift:94 lb42.6 kg Bodyweight Back Extension:Under 30: 7 reps30–39: 6 reps40–49: 6 reps50–59: 5 reps60+: 4 reps | Stiff-Leg Deadlift:123 lb55.8 kg Bodyweight Back Extension:Under 30: 18 reps30–39: 16 reps40–49: 14 reps50–59: 12 reps60+: 9 reps | Stiff-Leg Deadlift:171 lb77.6 kg Bodyweight Back Extension:Under 30: 34 reps30–39: 31 reps40–49: 27 reps50–59: 22 reps60+: 17 reps | Stiff-Leg Deadlift:226 lb102.5 kg Bodyweight Back Extension:Under 30: 54 reps30–39: 49 reps40–49: 43 reps50–59: 35 reps60+: 27 reps |
How Your Stiff Leg Deadlift vs Bodyweight Back Extension Result Is Calculated
The two exercises can use different measurements. The calculator rates each result against the standards for that exercise first, then compares the resulting strength levels and progress toward the next level. It never invents a reps-to-weight conversion.
1. Estimate the weight-based result
For Stiff-Leg Deadlift, one rep uses the weight entered. For 2–12 reps, the calculator runs both estimates and keeps the lower result.
- Epley: weight × (1 + reps ÷ 30)
- Brzycki: weight × 36 ÷ (37 − reps)
A published back-squat study supports estimated-max prediction under its study conditions. It does not independently validate every exercise or population used by this comparison.
2. Rate the Stiff-Leg Deadlift result
The standards use the sex-specific targets from the individual Stiff-Leg Deadlift tool. The target adjusts to bodyweight using reference target × (user bodyweight ÷ reference bodyweight) to the two-thirds power.
3. Rate the Bodyweight Back Extension result
The canonical repetition thresholds map the strict set to a strength tier; no reps-to-weight conversion is used. The calculator uses one continuous strict bodyweight back extension set scored by repetitions and does not convert the repetitions into an estimated weight.
4. Compare strength level and progress
The lower strength level is the priority. When both exercises reach the same level, a priority appears only when one is at least 10 points farther from its next target. Otherwise, the result is Balanced. Age range changes only the exercise whose standards include age; it remains an analytics field for the other exercise.
| Stage | What happens |
|---|---|
| Rate the stiff-leg deadlift | Adjust stiff-leg deadlift targets to exact bodyweight with the two-thirds rule. Measurement: estimated one-rep max. |
| Rate the bodyweight back extension | Rate strict bodyweight back extension repetitions without converting them into weight. Measurement: Strict bodyweight back extension reps. |
| Compare levels | Use each exercise’s own level and next target; do not compare or divide results that use different measurements. |
How Men’s Stiff Leg Deadlift and Bodyweight Back Extension Standards Differ
What the men’s standards show:
Stiff-Leg Deadlift Elite targets205 lb → 378 lb
Elite weight targets from 120 to 300 lb bodyweight.
Bodyweight Back Extension Elite targets85 reps → 43 reps
Elite direct-performance targets from the youngest to oldest listed age range at 120 lb bodyweight.
Comparison boundaryStrength level first
Raw repetitions, seconds, and weights are not divided or converted. The calculator compares each exercise’s canonical tier and progress within that tier.
The exact table above is the correct way to inspect direct or unlike measurements. A pounds-difference chart would be invalid because repetitions, seconds, and estimated weight do not share a unit.
How Women’s Stiff Leg Deadlift and Bodyweight Back Extension Standards Differ
What the women’s standards show:
Stiff-Leg Deadlift Elite targets126 lb → 226 lb
Elite weight targets from 100 to 240 lb bodyweight.
Bodyweight Back Extension Elite targets78 reps → 39 reps
Elite direct-performance targets from the youngest to oldest listed age range at 100 lb bodyweight.
Comparison boundaryStrength level first
Raw repetitions, seconds, and weights are not divided or converted. The calculator compares each exercise’s canonical tier and progress within that tier.
Use the calculator to apply the correct age range and exact bodyweight before comparing the two strength levels.
Stiff Leg Deadlift and Bodyweight Back Extension Exercises Used by This Calculator
This calculator uses a raw barbell stiff-leg deadlift and a strict bodyweight back extension. Use strict canonical Stiff Leg Deadlift and Bodyweight Back Extension tests. Do not mix variations, assistance, partial range, momentum, or different load conventions.
Use a floor-start stiff-leg deadlift with minimal knee bend
Begin each rep with the bar motionless on the floor, keep only a soft knee bend, hinge with the bar close, and finish fully upright. Enter total barbell weight. Do not use a Romanian or conventional deadlift, deficit or rack pull, touch-and-go bounce, Smith or machine variation, partial rep, or equipped lift.
Use a strict, repeatable Bodyweight Back Extension
Follow the individual Bodyweight Back Extension calculator’s canonical setup, load convention, range of motion, and finish rules. Keep the same setup when retesting.
Enter one recent Stiff Leg Deadlift result and one recent Bodyweight Back Extension result
Use each exercise’s canonical input: Total barbell weight for Stiff Leg Deadlift and No external load for Bodyweight Back Extension.
Related Tools
- Barbell Stiff-Leg Deadlift — View the individual Stiff-Leg Deadlift standards and next strength-level target.
- Bodyweight Back Extension Strength Standards — View the individual Bodyweight Back Extension standards and next strength-level target.
- Machine Back Extension — Use this related standards tool to compare a registry-approved neighboring exercise without mixing its result into this comparison.
- Lying Leg Curl — Use this related standards tool to compare a registry-approved neighboring exercise without mixing its result into this comparison.
- Cable Pull Through — Use this related standards tool to compare a registry-approved neighboring exercise without mixing its result into this comparison.
- Romanian Deadlift — Use this related standards tool to compare a registry-approved neighboring exercise without mixing its result into this comparison.