Lying Leg Curl Strength Standards Calculator
Under strict Lying Leg Curl strength standards, Novice starts around 0.26x bodyweight for men and 0.19x for women, while Elite starts around 0.84x for men and 0.66x for women.
Enter your bodyweight, weight lifted, and reps to estimate your 1RM and see whether your Lying Leg Curl is Novice, Intermediate, Advanced, or Elite for your bodyweight.
The calculator converts your set into an estimated 1RM-to-bodyweight ratio, then compares that ratio with the Lying Leg Curl standards for your sex. This keeps the result focused on relative strength instead of only the absolute weight lifted.
Understanding Your Lying Leg Curl Strength Score
Your Lying Leg Curl strength score is Estimated 1RM divided by bodyweight, using only strict prone bilateral hamstring isolation performed under a repeatable machine setup. The score ranks strict bilateral machine knee-flexion strength, not a universal machine-stack number.
Your Lying Leg Curl strength level comes from comparing your estimated one-rep max with targets for your sex and exact bodyweight. Those targets rise with bodyweight without using one fixed multiplier for every lifter.
A 150 lb female reaching 74 lb has a 0.49 ratio, which reaches Advanced for women when the same setup and range are preserved. A larger number produced by a changed machine setting or shortened range is not a better standards result.
Execution gives the score its meaning. Hips and pelvis stay fixed on the body pad; hip lift, pad slide, pelvis rotation, handle-yanking, partial pulses, stack bounce, uncontrolled return, single-leg substitution, and per-leg resistance entry do not count.
Read the badge as strict bilateral machine knee-flexion strength under one repeatable standard, not as proof that every machine or neighboring lift would rank the same way.
Lying Leg Curl Strength Standards
The Lying Leg Curl tables show where an estimated 1RM falls from Beginner through Elite, plus the Stretch benchmark, at each listed bodyweight. The ranges use allometric scaling, so they rise with bodyweight without increasing pound-for-pound.
Choose the table for your sex, find the row nearest your bodyweight, and locate the range containing your estimated 1RM. Each boundary belongs to the higher level. The calculator uses your exact bodyweight and remains the final result for bodyweights between rows.
Men’s Lying Leg Curl Strength Standards
| Bodyweight | Beginner | Novice | Intermediate | Advanced | Elite | Stretch |
|---|---|---|---|---|---|---|
| 120 lb | Under 37 lb | 37–59 lb | 60–89 lb | 90–117 lb | 118–139 lb | 140 lb+ |
| 130 lb | Under 39 lb | 39–63 lb | 64–94 lb | 95–123 lb | 124–147 lb | 148 lb+ |
| 140 lb | Under 41 lb | 41–66 lb | 67–99 lb | 100–130 lb | 131–154 lb | 155 lb+ |
| 150 lb | Under 43 lb | 43–69 lb | 70–103 lb | 104–136 lb | 137–161 lb | 162 lb+ |
| 160 lb | Under 45 lb | 45–72 lb | 73–108 lb | 109–142 lb | 143–168 lb | 169 lb+ |
| 170 lb | Under 46 lb | 46–75 lb | 76–112 lb | 113–148 lb | 149–175 lb | 176 lb+ |
| 180 lb | Under 48 lb | 48–78 lb | 79–117 lb | 118–153 lb | 154–182 lb | 183 lb+ |
| 190 lb | Under 50 lb | 50–81 lb | 82–121 lb | 122–159 lb | 160–189 lb | 190 lb+ |
| 200 lb | Under 52 lb | 52–84 lb | 85–125 lb | 126–165 lb | 166–196 lb | 197 lb+ |
| 210 lb | Under 53 lb | 53–87 lb | 88–129 lb | 130–170 lb | 171–202 lb | 203 lb+ |
| 220 lb | Under 55 lb | 55–89 lb | 90–134 lb | 135–175 lb | 176–209 lb | 210 lb+ |
| 230 lb | Under 57 lb | 57–92 lb | 93–138 lb | 139–181 lb | 182–215 lb | 216 lb+ |
| 240 lb | Under 58 lb | 58–95 lb | 96–142 lb | 143–186 lb | 187–221 lb | 222 lb+ |
| 250 lb | Under 60 lb | 60–97 lb | 98–145 lb | 146–191 lb | 192–227 lb | 228 lb+ |
| 260 lb | Under 62 lb | 62–100 lb | 101–149 lb | 150–196 lb | 197–233 lb | 234 lb+ |
Women’s Lying Leg Curl Strength Standards
| Bodyweight | Beginner | Novice | Intermediate | Advanced | Elite | Stretch |
|---|---|---|---|---|---|---|
| 100 lb | Under 22 lb | 22–36 lb | 37–55 lb | 56–75 lb | 76–91 lb | 92 lb+ |
| 110 lb | Under 24 lb | 24–39 lb | 40–59 lb | 60–80 lb | 81–97 lb | 98 lb+ |
| 120 lb | Under 25 lb | 25–41 lb | 42–63 lb | 64–85 lb | 86–102 lb | 103 lb+ |
| 130 lb | Under 26 lb | 26–44 lb | 45–66 lb | 67–90 lb | 91–108 lb | 109 lb+ |
| 140 lb | Under 28 lb | 28–46 lb | 47–70 lb | 71–95 lb | 96–114 lb | 115 lb+ |
| 150 lb | Under 29 lb | 29–48 lb | 49–73 lb | 74–99 lb | 100–119 lb | 120 lb+ |
| 160 lb | Under 30 lb | 30–50 lb | 51–76 lb | 77–103 lb | 104–124 lb | 125 lb+ |
| 170 lb | Under 32 lb | 32–52 lb | 53–79 lb | 80–108 lb | 109–129 lb | 130 lb+ |
| 180 lb | Under 33 lb | 33–54 lb | 55–83 lb | 84–112 lb | 113–135 lb | 136 lb+ |
| 190 lb | Under 34 lb | 34–56 lb | 57–86 lb | 87–116 lb | 117–139 lb | 140 lb+ |
| 200 lb | Under 35 lb | 35–58 lb | 59–89 lb | 90–120 lb | 121–144 lb | 145 lb+ |
| 210 lb | Under 36 lb | 36–60 lb | 61–92 lb | 93–124 lb | 125–149 lb | 150 lb+ |
| 220 lb | Under 37 lb | 37–62 lb | 63–95 lb | 96–128 lb | 129–154 lb | 155 lb+ |
These are Endura’s practical Lying Leg Curl standards. They are built from exercise-specific reference thresholds and validated against the calculator’s exact lower-inclusive tier boundaries; they are not population averages.
How the Lying Leg Curl Calculator Works
The Lying Leg Curl calculator estimates 1RM from the entered machine resistance and reps, divides that estimate by bodyweight, then compares the ratio with sex-specific standards. Ratio = Estimated 1RM / bodyweight.
If a 200 lb male records a 128 lb single, the ratio is 128 / 200 = 0.64, which is Advanced because the Advanced boundary is lower-inclusive. If he records 168 lb, the ratio is 0.84, which reaches Elite.
If a 150 lb female records 99 lb, the ratio is 99 / 150 = 0.66, which reaches Elite for women when the same standard is used.
The calculation applies to strict prone bilateral hamstring isolation. Do not enter leg extension, seated leg curl, Romanian deadlift, stiff-leg deadlift, good morning, leg press, unilateral variations, partial-range work, assisted reps, or resistance values borrowed from a different machine family.
The result can rank a tested set against bodyweight-based standards, but it cannot prove transfer to every related lift or machine because geometry, support, and range change the test.
Elite Lying Leg Curl Strength Levels
Elite Lying Leg Curl strength means reaching the Elite target for your sex and exact bodyweight. The target rises with bodyweight without increasing pound-for-pound, so use the calculator for your exact Elite and Stretch targets.
Perform a 168 lb Estimated 1RM at 200 lb bodyweight and the male ratio is 0.84, which reaches Elite. Perform 99 lb at 150 lb bodyweight and the female ratio is 0.66, which reaches Elite or better.
Elite proves that hamstring force through controlled knee flexion remains strong under the tested setup. It does not count when the score is inflated by leg extension, Romanian deadlift, stiff-leg deadlift, shorter range, assistance, or a machine setting that changes the movement.
At high ratios, failures usually appear as range loss, setup drift, finish weakness, or uncontrolled return. A cleaner 168 lb result is more meaningful than a heavier number that breaks the standard.
Lying Leg Curl Strength Compared to Other Lifts
Lying Leg Curl comparisons are useful for weakness detection, not for copying one standards result into another calculator. Each neighboring lift changes support, path, muscle contribution, resistance convention, or range.
| Related Movement | Comparison Purpose | Key Constraint Difference | What The Gap Reveals |
|---|---|---|---|
| Leg Extension | compare knee-flexion isolation with the opposite seated knee-extension machine | leg extension tests quadriceps knee extension, while lying leg curl tests hamstring knee flexion | What The Gap Reveals: opposite-machine isolation anchor can show whether the leg curl score reflects strict bilateral machine knee-flexion strength or a different strength quality. |
| Romanian Deadlift | contrast isolated knee flexion with posterior-chain hip hinging | Romanian deadlift uses hip extension and barbell bracing, while lying leg curl isolates knee flexion | What The Gap Reveals: posterior-chain hinge contrast can show whether the leg curl score reflects strict bilateral machine knee-flexion strength or a different strength quality. |
| Stiff-Leg Deadlift | separate hamstring hinge strength from prone machine curl strength | stiff-leg deadlift challenges hip hinge range and spinal bracing, while lying leg curl uses machine-guided knee flexion | What The Gap Reveals: hamstring hinge context can show whether the leg curl score reflects strict bilateral machine knee-flexion strength or a different strength quality. |
| Good Morning | compare hamstring involvement with a trunk-braced hip hinge | good morning strength depends heavily on spinal position and hip extension, unlike prone machine knee flexion | What The Gap Reveals: trunk-bracing contrast can show whether the leg curl score reflects strict bilateral machine knee-flexion strength or a different strength quality. |
| Leg Press | show the compound lower-body machine ceiling without substituting it for leg curl strength | leg press uses hip and knee extension with large machine resistance, while lying leg curl isolates knee flexion | What The Gap Reveals: compound machine ceiling can show whether the leg curl score reflects strict bilateral machine knee-flexion strength or a different strength quality. |
| Barbell Sumo Deadlift | compare hamstring isolation with a heavy posterior-chain pull | sumo deadlift uses full-body pulling mechanics, while lying leg curl removes hip extension and standing bracing | What The Gap Reveals: posterior-chain pull contrast can show whether the leg curl score reflects strict bilateral machine knee-flexion strength or a different strength quality. |
If a 200 lb male reaches 168 lb on leg curl but ranks lower on the closest free-weight comparison, the gap may show that machine support is helping more than free-weight control. If the related lift is stronger but leg curl stalls, the likely limiter is the specific machine path, range, or finish.
Use comparison gaps as clues about hamstring force through controlled knee flexion, not as permission to replace one tested standard with another.
Milestones in Lying Leg Curl Strength
Lying Leg Curl milestones show when the bodyweight-ratio score moves from basic standards toward Advanced, Elite, and Stretch-level performance. Every milestone assumes the same machine setup and strict execution.
| Men’s Milestone | Ratio | 200 lb Target | Decision Rule |
|---|---|---|---|
| Intermediate | 0.43x bodyweight | 86 lb Estimated 1RM | Build repeatable range before chasing Advanced. |
| Advanced | 0.64x bodyweight | 128 lb Estimated 1RM | Retest only when the same setup is preserved. |
| Elite | 0.84x bodyweight | 168 lb Estimated 1RM+ | Reject any score raised by a changed range or assistance. |
| Stretch Benchmark | 1.00x bodyweight | 200 lb Estimated 1RM | Use as a long-range benchmark, not a shortcut target. |
| Women’s Milestone | Ratio | 150 lb Target | Decision Rule |
|---|---|---|---|
| Intermediate | 0.32x bodyweight | 48 lb Estimated 1RM | Build repeatable range before chasing Advanced. |
| Advanced | 0.49x bodyweight | 74 lb Estimated 1RM | Retest only when the same setup is preserved. |
| Elite | 0.66x bodyweight | 99 lb Estimated 1RM+ | Reject any score raised by a changed range or assistance. |
| Stretch Benchmark | 0.80x bodyweight | 120 lb Estimated 1RM | Use as a long-range benchmark, not a shortcut target. |
Someone at 200 lb with a 160 lb valid result is about 8 lb short of the Elite target. A 150 lb female at 68 lb is about 6 lb short of the Advanced target.
Choose the next target by the smallest honest gap: add resistance when range and finish are clean, improve execution consistency when the same score wobbles, and retest only when the same standard can be repeated.
Milestone progress is rejected when a higher score comes from a different range, assistance, machine setting, unilateral substitution, or resistance convention.
Related Strength Standards Tools
The closest related strength standards tools for Lying Leg Curl are listed below. Use them for context and comparison, not as replacements for this exact standard.