TABLE 1

Subject characteristics

Before bed restAfter bed rest
CONFDRaPCONFDRbPcP
Age (years)25 ± 0.226.1 ± 1nsnmnm
VO2max (ml O2/kg/min)43.5 ± 1.539.1 ± 1.9ns42.8 ± 1.137.5 ± 2.0nsns
VO2max (ml/min)3,659 ± 1253,405 ± 162P < 0.053,527 ± 1013,190 ± 160nsns
Fasting arterial glucose (mmol/l)5.3 ± 0.15.5 ± 0.1ns5.1 ± 0.15.2 ± 0.1P < 0.05P < 0.05
Weight (kg)82.5 ± 2.384.0 ± 3.3ns82.2 ± 2.383.6 ± 3.2nsns
Height (m)1.85 ± 0.011.84 ± 0.02nsnmnm
BMI (kg/m2)24.1 ± 0.524.9 ± 0.9ns23.9 ± 0.524.8 ± 0.9nsns
Total fat mass (kg)14.3 ± 1.621.6 ± 2.5P < 0.0514.7 ± 1.821.5 ± 2.7nsns
Total lean mass (kg)63.8 ± 1.158.6 ± 1.5P < 0.0563.6 ± 1.158.4 ± 1.5nsns
Whole body fat percentage (%)17.4 ± 1.725.0 ± 2.3P < 0.0517.1 ± 1.624.9 ± 2.5nsns
Trunk fat mass/total fat mass0.48 ± 0.10.58 ± 0.001P < 0.050.50 ± 0.010.58 ± 0.01nsns
Leg fat mass/total fat mass0.37 ± 0.10.29 ± 0.01P < 0.050.37 ± 0.010.29 ± 0.01nsns
Waist/hip ratio0.85 ± 0.010.88 ± 0.02ns0.86 ± 0.010.87 ± 0.02nsns
Abdominal skinfold (mm)21 ± 1.825 ± 3.0ns21 ± 1.623 ± 2.0nsns
Femoral skinfold (mm)16 ± 1.516 ± 2.0ns15 ± 1.416 ± 2.0nsns
  • Data are mean ± SE.

  • aP, significant difference between the groups before bed rest (P < 0.05).

  • bP, significant difference before vs. after bed rest within CON, P < 0.05.

  • cP, significant difference before vs. after bed rest within FDR, P < 0.05. ns, not significant; nm, not measured.