Vibration effects on static balance and strength.

Area of Science:

• Exercise Physiology
• Biomechanics
• Gerontology

Background:

• Postural sway and reduced muscle strength are common in middle-aged women, increasing fall risk.
• Conventional strength training is effective, but novel methods like vibration training warrant investigation.

Purpose of the Study:

• To compare the effects of vibration training versus conventional strength training on knee muscle strength and postural sway in middle-aged women.
• To evaluate the impact of a 12-week training program on static balance and isokinetic strength.

Main Methods:

• 38 middle-aged women were randomized into Vibration, Strength, or Control groups for 12 weeks.
• Vibration group performed exercises on a vibration plate (15-25 Hz, 2-12.8 cm amplitude).
• Strength group performed similar exercises without vibration; balance and isokinetic strength were measured.

Main Results:

• Vibration training significantly reduced postural sway in all balance tasks (p<0.05).
• Both training groups showed significant increases in isokinetic knee extensor and flexor strength.
• Strength gains were comparable between the vibration and conventional strength training groups.

Conclusions:

• Side-alternating vibration training offers benefits for static balance control in middle-aged women.
• Both training modalities effectively improve muscle strength, suggesting vibration training is a viable alternative.