Table 4.
Maximal work rate (WRmax) during handgrip exercise
| Sex | MVC (kg) | MVC (lb) | WRmax (lb) | %WRmax (5% MVC) | %WRmax (15% MVC) | %WRmax (25% MVC) |
|---|---|---|---|---|---|---|
| F | 30 | 66 | 23.4 | 14 | 42 | 70.5 |
| F | 32 | 70.4 | 23.4 | 14.9 | 45.1 | 75.2 |
| M | 43 | 94.6 | 40 | 12.5 | 37.8 | 63.06 |
| F | 30 | 66 | 28.4 | 11.6 | 34.9 | 58.1 |
| M | 40 | 88 | 28.4 | 15.4 | 46.4 | 77.4 |
| M | 42 | 92.4 | 33.4 | 13.7 | 41.4 | 69.1 |
| Mean | 36.17 | 79.57 | 29.50 | 13.68 | 41.27 | 68.89 |
| SD | 6.15 | 13.52 | 6.36 | 1.43 | 4.34 | 7.28 |
| SE | 2.51 | 5.52 | 2.60 | 0.59 | 1.77 | 2.97 |
In 6 young adults (3 female, 3 male), using the same pulley system utilized in the study, graded handgrip exercise to fatigue was performed whereby individuals contracted to a duty cycle of 1 s contraction and 2 s relaxation using both audio and visual cues to ensure correct timing of contraction and relaxation. The starting weight was 5 lbs and increased by 2.5 lbs each minute until the subject was no longer able to perform a full contraction. The average test duration was 12 min, similar to that obtained during cycle ergometer or treadmill-based graded exercise tests. MVC, maximum voluntary contraction.