| PFS | pre-frailty syndrome group |
| FS | frailty syndrome group |
| SWLS | satisfaction with life scale |
| BDI | Beck depression inventory |
| STAI | Spielberg’s state-trait anxiety inventory |
| PT | peak torque |
| TW | total work |
| aP | average power |
| E | knee extensors |
| F | knee flexors |
| R | right side |
| L | left side |
| T1 | initial results |
| T2 | final results |
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