Male Strength Standards (kg)
| Strength Level | Back Extension | Nordic Hamstring Curl |
|---|---|---|
| Beginner | -28 kg | -33 kg |
| Novice | +13 kg | -7 kg |
| Intermediate | +71 kg | +26 kg |
| Advanced | +142 kg | +66 kg |
| Elite | +223 kg | +110 kg |
Female Strength Standards (kg)
| Strength Level | Back Extension | Nordic Hamstring Curl |
|---|---|---|
| Beginner | -16 kg | -20 kg |
| Novice | +10 kg | +3 kg |
| Intermediate | +43 kg | +31 kg |
| Advanced | +82 kg | +65 kg |
| Elite | +124 kg | +101 kg |