Compare the Results
| Patient Profile | Dynamometer* | Patented Back Builder |
| Sex | Males = 14, Females = 16 | Males = 8, Females = 11 |
| Active back pain | 100% | 59% |
| Pain for more than one year | 75% | 68% |
| Surgical candidates | 20-30% | 5.3% |
| Previous surgery | 14% | 23% |
| Exercise supervision | Continuous | One-time instruction only |
| Average treatment | 7.3 weeks | 4 weeks |
| Strength index (% change) | 79.2% | 78.3% |
| Efficiency (% change per week) | 10.85% per week | 19.58% per week |
