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

Level

Beg.

35 kg
(78 lbs)

18 kg
(39 lbs)

Nov.

61 kg
(135 lbs)

34 kg
(76 lbs)

Int.

96 kg
(212 lbs)

58 kg
(128 lbs)

Adv.

139 kg
(306 lbs)

88 kg
(193 lbs)

Pro

186 kg
(411 lbs)

122 kg
(268 lbs)

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 (kg)

By Bodyweight
By Age

Table by Male and Bodyweight [1RM]

BW	Beg.	Nov.	Int.	Adv.	Pro
50	21	40	68	102	141
55	24	45	74	109	150
60	27	49	79	116	158
65	31	54	85	123	165
70	34	58	90	129	172
75	37	62	95	134	179
80	40	65	99	140	186
85	42	69	104	145	192
90	45	73	108	150	198
95	48	76	112	155	203
100	51	79	116	160	209
105	53	83	120	165	214
110	56	86	124	169	219
115	58	89	128	173	224
120	61	92	131	178	228
125	63	95	135	182	233
130	65	97	138	186	237
135	68	100	141	189	242
140	70	103	144	193	246

Table by Male and Age [1RM]

Age	Beg.	Nov.	Int.	Adv.	Pro
15	30	52	82	118	159
20	35	60	94	135	182
25	35	61	96	139	186
30	35	61	96	139	186
35	35	61	96	139	186
40	35	61	96	139	186
45	34	58	91	132	177
50	32	55	86	123	166
55	29	51	79	114	154
60	27	46	72	104	140
65	24	42	65	94	127
70	22	37	59	84	114
75	19	33	52	76	102
80	17	30	47	68	91
85	15	27	42	61	81
90	14	24	38	55	73

Table by Female and Bodyweight [1RM]

BW	Beg.	Nov.	Int.	Adv.	Pro
40	12	25	46	72	102
45	13	28	49	75	107
50	14	30	51	79	111
55	16	31	54	82	114
60	17	33	56	85	118
65	18	35	58	87	121
70	19	36	60	90	124
75	20	38	62	92	126
80	22	39	64	94	129
85	23	41	66	97	131
90	24	42	67	99	134
95	24	43	69	101	136
100	25	45	71	102	138
105	26	46	72	104	140
110	27	47	73	106	142
115	28	48	75	107	144
120	29	49	76	109	146

Table by Female and Age [1RM]

Age	Beg.	Nov.	Int.	Adv.	Pro
15	15	29	49	75	104
20	17	34	57	85	119
25	18	34	58	88	122
30	18	34	58	88	122
35	18	34	58	88	122
40	18	34	58	88	122
45	17	33	55	83	116
50	16	31	52	78	108
55	15	28	48	72	100
60	13	26	44	66	92
65	12	23	39	60	83
70	11	21	35	53	74
75	10	19	32	48	66
80	9	17	28	43	59
85	8	15	25	38	53
90	7	14	23	35	48

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 (kg)

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
50	21	40	68	102	141
55	24	45	74	109	150
60	27	49	79	116	158
65	31	54	85	123	165
70	34	58	90	129	172
75	37	62	95	134	179
80	40	65	99	140	186
85	42	69	104	145	192
90	45	73	108	150	198
95	48	76	112	155	203
100	51	79	116	160	209
105	53	83	120	165	214
110	56	86	124	169	219
115	58	89	128	173	224
120	61	92	131	178	228
125	63	95	135	182	233
130	65	97	138	186	237
135	68	100	141	189	242
140	70	103	144	193	246

Age	Beg.	Nov.	Int.	Adv.	Pro
15	30	52	82	118	159
20	35	60	94	135	182
25	35	61	96	139	186
30	35	61	96	139	186
35	35	61	96	139	186
40	35	61	96	139	186
45	34	58	91	132	177
50	32	55	86	123	166
55	29	51	79	114	154
60	27	46	72	104	140
65	24	42	65	94	127
70	22	37	59	84	114
75	19	33	52	76	102
80	17	30	47	68	91
85	15	27	42	61	81
90	14	24	38	55	73

BW	Beg.	Nov.	Int.	Adv.	Pro
40	12	25	46	72	102
45	13	28	49	75	107
50	14	30	51	79	111
55	16	31	54	82	114
60	17	33	56	85	118
65	18	35	58	87	121
70	19	36	60	90	124
75	20	38	62	92	126
80	22	39	64	94	129
85	23	41	66	97	131
90	24	42	67	99	134
95	24	43	69	101	136
100	25	45	71	102	138
105	26	46	72	104	140
110	27	47	73	106	142
115	28	48	75	107	144
120	29	49	76	109	146

Age	Beg.	Nov.	Int.	Adv.	Pro
15	15	29	49	75	104
20	17	34	57	85	119
25	18	34	58	88	122
30	18	34	58	88	122
35	18	34	58	88	122
40	18	34	58	88	122
45	17	33	55	83	116
50	16	31	52	78	108
55	15	28	48	72	100
60	13	26	44	66	92
65	12	23	39	60	83
70	11	21	35	53	74
75	10	19	32	48	66
80	9	17	28	43	59
85	8	15	25	38	53
90	7	14	23	35	48

BW	Beg.	Nov.	Int.	Adv.	Pro
50	21	40	68	102	141
55	24	45	74	109	150
60	27	49	79	116	158
65	31	54	85	123	165
70	34	58	90	129	172
75	37	62	95	134	179
80	40	65	99	140	186
85	42	69	104	145	192
90	45	73	108	150	198
95	48	76	112	155	203
100	51	79	116	160	209
105	53	83	120	165	214
110	56	86	124	169	219
115	58	89	128	173	224
120	61	92	131	178	228
125	63	95	135	182	233
130	65	97	138	186	237
135	68	100	141	189	242
140	70	103	144	193	246

Age	Beg.	Nov.	Int.	Adv.	Pro
15	30	52	82	118	159
20	35	60	94	135	182
25	35	61	96	139	186
30	35	61	96	139	186
35	35	61	96	139	186
40	35	61	96	139	186
45	34	58	91	132	177
50	32	55	86	123	166
55	29	51	79	114	154
60	27	46	72	104	140
65	24	42	65	94	127
70	22	37	59	84	114
75	19	33	52	76	102
80	17	30	47	68	91
85	15	27	42	61	81
90	14	24	38	55	73

BW	Beg.	Nov.	Int.	Adv.	Pro
40	12	25	46	72	102
45	13	28	49	75	107
50	14	30	51	79	111
55	16	31	54	82	114
60	17	33	56	85	118
65	18	35	58	87	121
70	19	36	60	90	124
75	20	38	62	92	126
80	22	39	64	94	129
85	23	41	66	97	131
90	24	42	67	99	134
95	24	43	69	101	136
100	25	45	71	102	138
105	26	46	72	104	140
110	27	47	73	106	142
115	28	48	75	107	144
120	29	49	76	109	146

Age	Beg.	Nov.	Int.	Adv.	Pro
15	15	29	49	75	104
20	17	34	57	85	119
25	18	34	58	88	122
30	18	34	58	88	122
35	18	34	58	88	122
40	18	34	58	88	122
45	17	33	55	83	116
50	16	31	52	78	108
55	15	28	48	72	100
60	13	26	44	66	92
65	12	23	39	60	83
70	11	21	35	53	74
75	10	19	32	48	66
80	9	17	28	43	59
85	8	15	25	38	53
90	7	14	23	35	48

BW	Beg.	Nov.	Int.	Adv.	Pro
50	21	40	68	102	141
55	24	45	74	109	150
60	27	49	79	116	158
65	31	54	85	123	165
70	34	58	90	129	172
75	37	62	95	134	179
80	40	65	99	140	186
85	42	69	104	145	192
90	45	73	108	150	198
95	48	76	112	155	203
100	51	79	116	160	209
105	53	83	120	165	214
110	56	86	124	169	219
115	58	89	128	173	224
120	61	92	131	178	228
125	63	95	135	182	233
130	65	97	138	186	237
135	68	100	141	189	242
140	70	103	144	193	246

Age	Beg.	Nov.	Int.	Adv.	Pro
15	30	52	82	118	159
20	35	60	94	135	182
25	35	61	96	139	186
30	35	61	96	139	186
35	35	61	96	139	186
40	35	61	96	139	186
45	34	58	91	132	177
50	32	55	86	123	166
55	29	51	79	114	154
60	27	46	72	104	140
65	24	42	65	94	127
70	22	37	59	84	114
75	19	33	52	76	102
80	17	30	47	68	91
85	15	27	42	61	81
90	14	24	38	55	73

BW	Beg.	Nov.	Int.	Adv.	Pro
40	12	25	46	72	102
45	13	28	49	75	107
50	14	30	51	79	111
55	16	31	54	82	114
60	17	33	56	85	118
65	18	35	58	87	121
70	19	36	60	90	124
75	20	38	62	92	126
80	22	39	64	94	129
85	23	41	66	97	131
90	24	42	67	99	134
95	24	43	69	101	136
100	25	45	71	102	138
105	26	46	72	104	140
110	27	47	73	106	142
115	28	48	75	107	144
120	29	49	76	109	146

Age	Beg.	Nov.	Int.	Adv.	Pro
15	15	29	49	75	104
20	17	34	57	85	119
25	18	34	58	88	122
30	18	34	58	88	122
35	18	34	58	88	122
40	18	34	58	88	122
45	17	33	55	83	116
50	16	31	52	78	108
55	15	28	48	72	100
60	13	26	44	66	92
65	12	23	39	60	83
70	11	21	35	53	74
75	10	19	32	48	66
80	9	17	28	43	59
85	8	15	25	38	53
90	7	14	23	35	48