Male Strength Standards (lb)
| Strength Level | Machine Back Extension | Seated Leg Curl |
|---|---|---|
| Beginner | 67 lb | 64 lb |
| Novice | 147 lb | 111 lb |
| Intermediate | 264 lb | 174 lb |
| Advanced | 415 lb | 252 lb |
| Elite | 591 lb | 338 lb |
Female Strength Standards (lb)
| Strength Level | Machine Back Extension | Seated Leg Curl |
|---|---|---|
| Beginner | 28 lb | 35 lb |
| Novice | 54 lb | 64 lb |
| Intermediate | 90 lb | 105 lb |
| Advanced | 135 lb | 155 lb |
| Elite | 187 lb | 212 lb |