Studies related to Muscular Endurance and Iron

Iron Supplementation Improves Progressive Fatigue Resistance During Dynamic Knee Extensor Exercise In Iron-depleted, Nonanemic Women

Effect Increase
Values Figure 2
Trial Design Randomized trial
Trial Length 1-6 months
Number of Subjects 20
Sex Female
Age Range 18-29, 30-44, 45-64
Notes for this study:
In a randomized, double-blind, placebo-controlled trial, 20 women with low iron levels but not anemia were assigned to 20 mg of iron per day from ferrous sulfate or placebo for 6 weeks.

At the end of 6 weeks, hemoglobin was unchanged but ferritin, serum iron, and transferring saturation were increased significantly more in the iron group than the placebo group. The participantss underwent a dynamic knee extension test in order to measure maximal voluntary static contradictions and thus, muscle fatigue. The iron group saw a smaller decline in force over 6 minutes than the placebo group, the difference being statistically significant.