Comparison between three strength development methods on body composition in healthy elderly women

Area of Science:

• Gerontology
• Exercise Physiology
• Biomedical Engineering

Background:

• Aging is associated with decreased muscle mass and bone mineral density (BMD).
• Strength development interventions are crucial for maintaining physical function in older adults.
• Understanding the efficacy of different training modalities is vital for public health recommendations.

Purpose of the Study:

• To evaluate the effects of stair climbing (SC), electrostimulation (ES), and combined (SC+ES) training on body composition and BMD in women aged 62-75.
• To compare the impact of these three strength development methods over a 6-week period.

Main Methods:

• Thirty-two women aged 62-75 were randomized into three groups: SC, ES, and SC+ES.
• The SC group performed 300 stairs daily; the ES group underwent quadriceps electrostimulation.
• Body composition and BMD were measured using Absorptiometry before and after the 6-week intervention.

Main Results:

• No significant increase in overall BMD was observed across any group.
• The SC+ES group demonstrated significantly greater BMD enhancement in the trochanter and both legs compared to the SC and ES groups.
• An interaction effect between group and time indicated superior BMD changes in the combined training group.

Conclusions:

• While neither stair climbing nor electrostimulation alone significantly improved BMD, their combination showed promising results.
• Combined stair climbing and electrostimulation warrants further investigation over longer durations for potential benefits in bone health.
• This study suggests that combined training may be a more effective strategy for enhancing specific bone density sites in older women.