Table 4.
Mean differences in HOMA-IR in men across categories of strength training based on simple, hourly cut-points, after adjusting for potential confounders.
Outcome variable | Minutes of strength training | F | P | |||||||
---|---|---|---|---|---|---|---|---|---|---|
None | Low | Moderate | High | |||||||
Mean | SE | Mean | SE | Mean | SE | Mean | SE | |||
HOMA-IR | ||||||||||
Model 1 | 2.59a | 0.12 | 2.24a,b | 0.36 | 1.96b | 0.21 | 1.94b | 0.20 | 11.40 | <0.0001 |
Model 2 | 2.62a | 0.08 | 2.37a,b | 0.32 | 2.00b | 0.17 | 1.94b | 0.12 | 13.88 | <0.0001 |
Model 3 | 2.66a | 0.09 | 2.45a,b | 0.32 | 2.07b | 0.17 | 2.10b | 0.11 | 12.65 | <0.0001 |
Model 4 | 2.61a | 0.07 | 2.37a,b | 0.32 | 2.01b | 0.16 | 1.95b | 0.10 | 11.98 | <0.0001 |
Model 5 | 2.62a | 0.08 | 2.38a,b | 0.32 | 2.03b | 0.17 | 2.00b | 0.12 | 11.91 | <0.0001 |
Model 6 | 2.62a | 0.07 | 2.42a,b | 0.31 | 2.08b | 0.15 | 2.09b | 0.10 | 10.22 | <0.0001 |
Model 7 | 2.66a | 0.09 | 2.58a,b | 0.32 | 2.15b | 0.15 | 2.23b | 0.09 | 9.26 | <0.0001 |
a,bMeans on the same row with the same superscript letter are not significantly different (P > 0.05). SE = standard error of the mean. Means have been adjusted according to the covariates included in the model. Model 1 included age, race, and year of assessment as covariates. Model 2 included age, race, year, pack-years of smoking, other physical activity, and BMI. Model 3 included the same covariates as Model 2 plus waist circumference. Model 4 included the same covariates as Model 2 plus fat-free mass. Model 5 included the same covariates as Model 2 plus body fat percent. Model 6 included the same covariates as Model 2 plus the fat-free mass index. Model 7 included the same covariates as Model 2 plus waist circumference, fat-free mass (kg), body fat percentage, and the fat-free mass index. For the categories representing minutes of strength training, None included men reporting ≤10 minutes per week of strength training. Low included men reporting >10 minutes per week and <60 minutes per week, Moderate included men reporting ≥ to 60 minutes per week and < 120 minutes per week, and High included men reporting ≥120 minutes per week.