Male Strength Standards (lb)
| Strength Level | Back Extension | Nordic Hamstring Curl |
|---|---|---|
| Beginner | -63 lb | -73 lb |
| Novice | +30 lb | -16 lb |
| Intermediate | +156 lb | +58 lb |
| Advanced | +313 lb | +146 lb |
| Elite | +492 lb | +243 lb |
Female Strength Standards (lb)
| Strength Level | Back Extension | Nordic Hamstring Curl |
|---|---|---|
| Beginner | -35 lb | -43 lb |
| Novice | +22 lb | +6 lb |
| Intermediate | +94 lb | +69 lb |
| Advanced | +180 lb | +143 lb |
| Elite | +273 lb | +224 lb |