Table 1

Physical characteristics, physical activity levels, strength performance of the subjects, as well as average intensity and average number of repetitions of the exercise protocols in each group

Control groupLow-intensity groupModerate-intensity groupHigh-intensity group
Age (years)71.7 ± 2.072.4 ± 1.671.0 ± 1.271.1 ± 1.5
Height (m)1.67 ± 0.011.65 ± 0.021.68 ± 0.031.65 ± 0.01
Weight (kg)81.3 ± 2.780.3 ± 3.382.0 ± 2.878.3 ± 1.7
BMI (kg/m2)29.1 ± 0.629.4 ± 0.929.0 ± 0.428.7 ± 0.3
Skinfold sum (mm)126.4 ± 3.3124.8 ± 4.1125.1 ± 2.7124.6 ± 4.4
Waist-to-hip ratio0.95 ± 0.070.94 ± 0.060.93 ± 0.090.96 ± 0.07
Vo2peak (ml · kg−1 · min−1)16.1 ± 0.616.7 ± 0.416.3 ± 0.517.0 ± 0.4
Activity level*8.15 ± 0.38.34 ± 0.47.89 ± 0.28.21 ± 0.2
Trunk strength (kg)37.7 ± 3.438.9 ± 3.936.8 ± 2.938.3 ± 4.2
Lower limb strength (kg)69.6 ± 5.272.3 ± 5.868.7 ± 4.573.1 ± 5.9
HOMAIR index2.92 ± 0.73.30 ± 0.63.23 ± 0.52.88 ± 0.4
Exercise energy cost (kcal)NA295.6 ± 10.7281.6 ± 9.8221.6 ± 8.8§
RepetitionsNA14.6 ± 0.39.7 ± 0.26.9 ± 0.1
Average intensity (% 1RM)NA46.1 ± 0.464.9 ± 0.985.2 ± 0.6
  • Data are means ± SEM.

  • *According to Baecke physical activity questionnaire.

  • †One maximal repetition measured in chest press.

  • ‡One maximal repetition measured in leg press.

  • §Significant difference between the high-intensity group and the other groups (P < 0.05). HOMAIR, homeostasis model assessment of insulin resistance; NA, not applicable.