Table 1.
Participant means and standard deviations for Rest and Exercise groups
| Rest | HIIT exercise | |
|---|---|---|
| n (female) | 12 (7) | 11 (8) |
| Age (years) | 67.92 ± 4.10 | 65.27 ± 6.31 |
| Retention test delay (hrs) | 5.89 ± 0.36 | 5.77 ± 0.30 |
| Body mass index | 25.56 ± 3.59 | 27.19 ± 4.54 |
| Self-report physical activity (IPAQ) | 5789 ± 3888 | 8224 ± 3725 |
| Maximal fitness test | ||
| VO2peak (mL.kg−1.min−1) | 36.68 ± 10.92 | 38.76 ± 11.31 |
| n maximal test attained | 4 | 7 |
| Resting HR | 64.25 ± 3.41 | 67.00 ± 11.51 |
| Max HR (attained) | 151.00 ± 14.85 | 158.45 ± 11.56 |
| Max HR (estimated) | 160.46 ± 2.87 | 162.31 ± 4.42 |
| Max output (W) | 187.27 ± 71.65 | 185.00 ± 97.25 |
| Exercise session characteristics | ||
| Peak HR | 82.82 ± 10.40 | 150.91 ± 13.64 |
| Peak output (W) | 150.03 ± 83.85 | |
| Peak %HRR | 91.09 ± 10.46 | |
| RPE | 16 ± 2.79 | |
Resting heart rate (HR), max HR measured in beats per minute. Max output in watts (W), and heart rate reserve (HRR) obtained from graded exercise test. IPAQ (International Physical Activity Questionnaire) scores expressed as METs minutes/week. There were no significant group differences in demographics or maximal fitness parameters (all p > 0.05). Peak HR, output and Borg’s Rating of Perceived Exertion (RPE) for the acute exercise bout summarised for the exercise group only.