Table 3.
Number of repetitions completed at 60% and 80% 1RM in women and men
| Task | 60% 1RM Mean (SD) 95% CI |
80% 1RM Mean (SD) 95% CI |
P-value for paired t-test of equal means | P-value for test of equal variancesa |
|---|---|---|---|---|
| Women | ||||
| Young (N=8) | ||||
| Leg press | 28.8 (9.21) (22.0–35.5) | 17.0 (6.57) (12.2–21.8) | <0.001 | 0.165 |
| Leg extension | 11.4 (2.33) (9.7–13.1) | 8.8 (1.98) (7.3–10.2) | <0.001 | 0.508 |
| Bicep curl | 13.0 (4.34)b (9.8–16.2) | 6.5 (3.16) (4.2–8.8) | <0.001 | 0.313 |
| Old (N=16) | ||||
| Leg press | 23.3 (16.37) (14.8–31.7) | 12.8 (7.83) (8.7–16.8) | 0.002 | <0.001 |
| Leg extension | 11.1 (4.15) (9.0–13.3) | 7.9 (3.40) (6.1–9.6) | <0.001 | 0.296 |
| Bicep curl | 21.3 (22.32) (9.7–32.9) | 8.9 (4.33) (6.7–11.2) | 0.023 | <0.001 |
| Bicep curl (Remove outlier with 100 reps) | 16.1 (7.87) (12.4–21.4) | 8.9 (4.33) (6.7–11.2) | <0.001 | 0.002 |
| Task |
60% 1RM Mean (SD) 95% CI |
80% 1RM Mean (SD) 95% CI |
P-value for paired t-test of equal means | P-value for test of equal variancesa |
|
| ||||
| Men | ||||
| Young (N=8) | ||||
| Leg press | 26.3 (18.20)c (12.9–39.6) | 14.9d,g (8.37c (8.7–21.0) | 0.018 | <0.001 |
| Leg extension | 13.9 (4.36) (10.7–17.1) | 7.3 (1.98) (5.8–8.7) | 0.001 | 0.037 |
| Bicep curla | 12.9 (3.98) (10.0–15.8) | 6.1 (1.55) (5.0–7.3) | 0.001 | 0.024 |
| Old (N=16) | ||||
| Leg press | 19.3 (8.69) (14.7–23.8) | 9.1f (3.68) (7.2–11.0) | <0.001 | 0.003 |
| Leg extension | 11.8 (3.07) (10.2–13.3) | 8.6e (2.66) (7.2–9.9) | <0.001 | 0.531 |
| Bicep curla | 14.3 (4.78) (11.8–16.8) | 6.1 (2.98) (4.5–7.6) | <0.001 | 0.084 |
Notes:
Pittman’s test for equality of variances in dependent samples
significant difference compared to corresponding variance in older women (P<0.001)
significant difference compared to corresponding variance in older men (P<0.05)
significant difference compared to corresponding value in younger men on bicep curl (P=0.0002) and leg extension (P=0.0005)
significant difference compared to corresponding value in older men on bicep curl (P=0.0124)
significant difference compared to corresponding value in older men on bicep curl (P=0.0374)
significant difference compared to corresponding value in older men (P=0.0258).
Abbreviations: CI, confidence interval; RM, repetition maximum; SD, standard deviation.