Table 2.
Relationship Between Postexercise Glycemia and Exercise Duration on Exercise Days
| Metric | Exercise duration (min) |
Pa | ||
|---|---|---|---|---|
| 10 to 30 | 31 to <60 | ≥60 | ||
| No. of participants/no. of days | 31/160 | 41/348 | 28/111 | |
| Hours of glucose readings, median (quartiles) | 20 (13, 23) | 22 (18, 24) | 21 (14, 23) | |
| Baseline glucose before exercise (mg/dL)b, mean (SD) | 138 (58) | 156 (69) | 143 (60) | |
| Mean glucose (mg/dL), mean (SD) | 144 (43) | 153 (44) | 147 (44) | 0.40 |
| Glucose coefficient of variation (%), mean (SD) | 34% (12%) | 36% (11%) | 36% (12%) | |
| % TIR 70 to 180 mg/dL, mean (SD) | 67% (23%) | 61% (22%) | 60% (24%) | 0.06 |
| % Time below 70 mg/dLc, mean (SD) | 9.1% (10.8%) | 8.9% (10.3%) | 11.4% (14.5%) | 0.03 |
| % Time below 54 mg/dLc, mean (SD) | 2.8% (5.0%) | 3.0% (5.2%) | 5.5% (9.1%) | 0.03 |
| % Time above 180 mg/dLc, mean (SD) | 23% (23%) | 29% (23%) | 27% (25%) | 0.37 |
| % Time above 250 mg/dLc, mean (SD) | 7% (13%) | 10% (14%) | 8% (12%) | 0.36 |
Summary statistics are on a day-level.
a
From a repeated measures linear regression model adjusting for baseline age, BMI, HbA1c, pump use, baseline glucose before exercise, whether or not the exercise session was done in clinic, protocol, and exercise type with a first-order autoregressive correlation structure. Due to a skewed outcome, % time >180, >250, <70, and <54 mg/dL were rank-transformed.
b
Average glucose in the hour before exercise.
c
Due to skewed distribution, each metric was censored at the 5th and 95th percentile, and a winsorized mean and SD are reported.
BMI, body mass index.