Leg Extension

Muscles Activated

Muscle Group	Muscles
Primary Muscles	Quadriceps Femoris
Secondary Muscles	None
Stabilizer Muscles	Rectus Abdominis
Grip Muscles	None

Muscle Group

Muscles

Primary Muscles

Quadriceps Femoris

Secondary Muscles

None

Stabilizer Muscles

Rectus Abdominis

Grip Muscles

None

Leg Extension Average Weight [1RM]

Level
Beg.	35 kg (78 lb)	18 kg (39 lb)
Nov.	61 kg (135 lb)	34 kg (76 lb)
Int.	96 kg (212 lb)	58 kg (128 lb)
Adv.	139 kg (306 lb)	88 kg (193 lb)
Pro	186 kg (411 lb)	122 kg (268 lb)

Level

Beg.

35 kg
(78 lb)

18 kg
(39 lb)

Nov.

61 kg
(135 lb)

34 kg
(76 lb)

Int.

96 kg
(212 lb)

58 kg
(128 lb)

Adv.

139 kg
(306 lb)

88 kg
(193 lb)

Pro

186 kg
(411 lb)

122 kg
(268 lb)

Note: These standards are based on the average lifter and may vary depending on individual factors such as body weight and age. More detailed data is provided below.

Leg Extension Standard (lb)

By Bodyweight
By Age

Table by Male and Bodyweight [1RM]

BW	Beg.	Nov.	Int.	Adv.	Pro
110	46	89	149	225	311
120	52	98	161	239	328
130	59	107	172	253	345
140	65	115	183	266	360
150	72	124	193	278	374
160	78	132	203	290	388
170	84	139	213	302	401
180	89	147	222	313	414
190	95	154	231	323	426
200	101	161	239	333	437
210	106	168	248	343	449
220	111	175	256	353	459
230	117	181	264	362	470
240	122	187	271	371	480
250	127	193	279	379	490
260	132	199	286	388	499
270	136	205	293	396	509
280	141	211	300	404	518
290	146	217	306	412	526
300	150	222	313	419	535
310	154	228	319	426	543

Table by Male and Age [1RM]

Age	Beg.	Nov.	Int.	Adv.	Pro
15	66	115	180	260	350
20	76	132	206	298	401
25	78	135	212	306	411
30	78	135	212	306	411
35	78	135	212	306	411
40	78	135	212	306	411
45	74	128	201	290	390
50	69	120	189	272	366
55	64	111	174	252	339
60	59	102	159	230	309
65	53	92	144	208	279
70	48	82	129	186	251
75	43	74	115	167	224
80	38	66	103	149	200
85	34	59	93	133	180
90	31	53	83	120	162

Table by Female and Bodyweight [1RM]

BW	Beg.	Nov.	Int.	Adv.	Pro
90	26	57	102	160	227
100	29	61	107	167	236
110	32	65	113	173	244
120	34	69	118	180	251
130	37	72	122	185	258
140	39	76	127	191	264
150	42	79	131	196	270
160	44	82	135	201	276
170	46	85	139	205	281
180	48	88	142	210	286
190	50	91	146	214	291
200	52	93	149	218	296
210	54	96	152	222	300
220	56	98	155	225	305
230	58	101	158	229	309
240	59	103	161	232	313
250	61	105	164	236	317
260	63	107	167	239	320

Table by Female and Age [1RM]

Age	Beg.	Nov.	Int.	Adv.	Pro
15	33	65	109	165	229
20	38	74	125	188	262
25	39	76	128	193	268
30	39	76	128	193	268
35	39	76	128	193	268
40	39	76	128	193	268
45	37	72	121	183	255
50	35	68	114	172	239
55	32	63	105	159	221
60	29	57	96	145	202
65	26	52	87	131	182
70	24	46	78	118	164
75	21	41	70	105	146
80	19	37	62	94	131
85	17	33	56	84	117
90	15	30	50	76	106

Note: The dumbbell weights listed in the table refer to the weight of a single dumbbell. Standard gym barbells typically weigh 20 kg / 44lbs.

About Tables

Level	Description	Percentile
Beg.	Adopt correct form and continue with your workouts for over a month.	Bottom 5%
Nov.	Continue with your workouts consistently for over 6 months.	Top 80%
Int.	Continue with your workouts consistently for over 2 years.	Top 50%
Adv.	Continue with your workouts consistently for over 5 years.	上位 20%
Pro	Specialize in the workout routine for over 5 years.	Top 5%

Level

Description

Percentile

Beg.

Adopt correct form and continue with your workouts for over a month.

Bottom 5%

Nov.

Continue with your workouts consistently for over 6 months.

Top 80%

Int.

Continue with your workouts consistently for over 2 years.

Top 50%

Adv.

Continue with your workouts consistently for over 5 years.

上位 20%

Pro

Specialize in the workout routine for over 5 years.

Top 5%

Estimated Calorie Burn per 10 Minutes

Intensity	Calories Burned
Easy	🔥 20-30 Calories
Medium	🔥 30-45 Calories
Hard	🔥 45-60 Calories
Max	🔥 60-80 Calories

Intensity

Calories Burned

Easy

🔥 20-30 Calories

Medium

🔥 30-45 Calories

Hard

🔥 45-60 Calories

Max

🔥 60-80 Calories

Note：These are estimated values for an average adult. Actual calorie burn may vary based on individual factors such as weight, muscle mass, and exercise form.

Intensity Levels：

Easy：Warm-up sets or recovery work
Medium：Standard workout sets
Hard：Heavy lifting or higher volume
Max：Maximum effort or AMRAP sets

Muscles Activated

Leg Extension Average Weight [1RM]

Leg Extension Standard (lb)

Table by Male and Bodyweight [1RM]

Table by Male and Age [1RM]

Table by Female and Bodyweight [1RM]

Table by Female and Age [1RM]

About Tables

Estimated Calorie Burn per 10 Minutes

Other Workouts

Whole Body Workouts

Chest Workouts

Back Workouts

Shoulder Workouts

Arm Workouts

Leg Workouts

Core Workouts

BW	Beg.	Nov.	Int.	Adv.	Pro
110	46	89	149	225	311
120	52	98	161	239	328
130	59	107	172	253	345
140	65	115	183	266	360
150	72	124	193	278	374
160	78	132	203	290	388
170	84	139	213	302	401
180	89	147	222	313	414
190	95	154	231	323	426
200	101	161	239	333	437
210	106	168	248	343	449
220	111	175	256	353	459
230	117	181	264	362	470
240	122	187	271	371	480
250	127	193	279	379	490
260	132	199	286	388	499
270	136	205	293	396	509
280	141	211	300	404	518
290	146	217	306	412	526
300	150	222	313	419	535
310	154	228	319	426	543

Age	Beg.	Nov.	Int.	Adv.	Pro
15	66	115	180	260	350
20	76	132	206	298	401
25	78	135	212	306	411
30	78	135	212	306	411
35	78	135	212	306	411
40	78	135	212	306	411
45	74	128	201	290	390
50	69	120	189	272	366
55	64	111	174	252	339
60	59	102	159	230	309
65	53	92	144	208	279
70	48	82	129	186	251
75	43	74	115	167	224
80	38	66	103	149	200
85	34	59	93	133	180
90	31	53	83	120	162

BW	Beg.	Nov.	Int.	Adv.	Pro
90	26	57	102	160	227
100	29	61	107	167	236
110	32	65	113	173	244
120	34	69	118	180	251
130	37	72	122	185	258
140	39	76	127	191	264
150	42	79	131	196	270
160	44	82	135	201	276
170	46	85	139	205	281
180	48	88	142	210	286
190	50	91	146	214	291
200	52	93	149	218	296
210	54	96	152	222	300
220	56	98	155	225	305
230	58	101	158	229	309
240	59	103	161	232	313
250	61	105	164	236	317
260	63	107	167	239	320

Age	Beg.	Nov.	Int.	Adv.	Pro
15	33	65	109	165	229
20	38	74	125	188	262
25	39	76	128	193	268
30	39	76	128	193	268
35	39	76	128	193	268
40	39	76	128	193	268
45	37	72	121	183	255
50	35	68	114	172	239
55	32	63	105	159	221
60	29	57	96	145	202
65	26	52	87	131	182
70	24	46	78	118	164
75	21	41	70	105	146
80	19	37	62	94	131
85	17	33	56	84	117
90	15	30	50	76	106

BW	Beg.	Nov.	Int.	Adv.	Pro
110	46	89	149	225	311
120	52	98	161	239	328
130	59	107	172	253	345
140	65	115	183	266	360
150	72	124	193	278	374
160	78	132	203	290	388
170	84	139	213	302	401
180	89	147	222	313	414
190	95	154	231	323	426
200	101	161	239	333	437
210	106	168	248	343	449
220	111	175	256	353	459
230	117	181	264	362	470
240	122	187	271	371	480
250	127	193	279	379	490
260	132	199	286	388	499
270	136	205	293	396	509
280	141	211	300	404	518
290	146	217	306	412	526
300	150	222	313	419	535
310	154	228	319	426	543

Age	Beg.	Nov.	Int.	Adv.	Pro
15	66	115	180	260	350
20	76	132	206	298	401
25	78	135	212	306	411
30	78	135	212	306	411
35	78	135	212	306	411
40	78	135	212	306	411
45	74	128	201	290	390
50	69	120	189	272	366
55	64	111	174	252	339
60	59	102	159	230	309
65	53	92	144	208	279
70	48	82	129	186	251
75	43	74	115	167	224
80	38	66	103	149	200
85	34	59	93	133	180
90	31	53	83	120	162

BW	Beg.	Nov.	Int.	Adv.	Pro
90	26	57	102	160	227
100	29	61	107	167	236
110	32	65	113	173	244
120	34	69	118	180	251
130	37	72	122	185	258
140	39	76	127	191	264
150	42	79	131	196	270
160	44	82	135	201	276
170	46	85	139	205	281
180	48	88	142	210	286
190	50	91	146	214	291
200	52	93	149	218	296
210	54	96	152	222	300
220	56	98	155	225	305
230	58	101	158	229	309
240	59	103	161	232	313
250	61	105	164	236	317
260	63	107	167	239	320

Age	Beg.	Nov.	Int.	Adv.	Pro
15	33	65	109	165	229
20	38	74	125	188	262
25	39	76	128	193	268
30	39	76	128	193	268
35	39	76	128	193	268
40	39	76	128	193	268
45	37	72	121	183	255
50	35	68	114	172	239
55	32	63	105	159	221
60	29	57	96	145	202
65	26	52	87	131	182
70	24	46	78	118	164
75	21	41	70	105	146
80	19	37	62	94	131
85	17	33	56	84	117
90	15	30	50	76	106

BW	Beg.	Nov.	Int.	Adv.	Pro
110	46	89	149	225	311
120	52	98	161	239	328
130	59	107	172	253	345
140	65	115	183	266	360
150	72	124	193	278	374
160	78	132	203	290	388
170	84	139	213	302	401
180	89	147	222	313	414
190	95	154	231	323	426
200	101	161	239	333	437
210	106	168	248	343	449
220	111	175	256	353	459
230	117	181	264	362	470
240	122	187	271	371	480
250	127	193	279	379	490
260	132	199	286	388	499
270	136	205	293	396	509
280	141	211	300	404	518
290	146	217	306	412	526
300	150	222	313	419	535
310	154	228	319	426	543

Age	Beg.	Nov.	Int.	Adv.	Pro
15	66	115	180	260	350
20	76	132	206	298	401
25	78	135	212	306	411
30	78	135	212	306	411
35	78	135	212	306	411
40	78	135	212	306	411
45	74	128	201	290	390
50	69	120	189	272	366
55	64	111	174	252	339
60	59	102	159	230	309
65	53	92	144	208	279
70	48	82	129	186	251
75	43	74	115	167	224
80	38	66	103	149	200
85	34	59	93	133	180
90	31	53	83	120	162

BW	Beg.	Nov.	Int.	Adv.	Pro
90	26	57	102	160	227
100	29	61	107	167	236
110	32	65	113	173	244
120	34	69	118	180	251
130	37	72	122	185	258
140	39	76	127	191	264
150	42	79	131	196	270
160	44	82	135	201	276
170	46	85	139	205	281
180	48	88	142	210	286
190	50	91	146	214	291
200	52	93	149	218	296
210	54	96	152	222	300
220	56	98	155	225	305
230	58	101	158	229	309
240	59	103	161	232	313
250	61	105	164	236	317
260	63	107	167	239	320

Age	Beg.	Nov.	Int.	Adv.	Pro
15	33	65	109	165	229
20	38	74	125	188	262
25	39	76	128	193	268
30	39	76	128	193	268
35	39	76	128	193	268
40	39	76	128	193	268
45	37	72	121	183	255
50	35	68	114	172	239
55	32	63	105	159	221
60	29	57	96	145	202
65	26	52	87	131	182
70	24	46	78	118	164
75	21	41	70	105	146
80	19	37	62	94	131
85	17	33	56	84	117
90	15	30	50	76	106