Prevention of Slip-related Backward Balance Loss: the Effect of Session Intensity and Frequency on Long-term Retention

Overview

Journal Arch Phys Med Rehabil

Specialty Rehabilitation Medicine

Date 2009 Jan 22

PMID 19154827

Citations 29

Authors

Tanvi Bhatt

Yi-Chung Pai

Affiliations

Soon will be listed here.

Abstract

Objective: To examine the effects of session intensity (number of slip exposures) and frequency on the retention of acquired adaptation for prevention of backward balance loss after repeated-slip training.

Design: A 4-group, randomized, and controlled study.

Setting: Biomechanics research laboratory.

Participants: Healthy young subjects (N=46; 21 men).

Interventions: Twenty-four subjects experienced a high-intensity session of 24 repeated right-side slips; 12 received additional single-slip sessions at a frequency of 1 week, 2 weeks, and 1 month, whereas the rest got no ancillary training. Another 24 subjects received a low-intensity initial session of a single slip; 12 received the same high-frequency ancillary training, whereas the rest got none. All groups were retested with a single slip 4 months after the first session.

Main Outcome Measures: The incidence of backward balance loss, gait stability, and limb support.

Results: The high-intensity groups, irrespective of ancillary training, displayed similar improvements in all 3 outcome measures. Remarkably, the low-intensity group receiving ancillary training also significantly improved in all measures, with retention comparable to that observed in the other 2 groups. A single-slip exposure without ancillary sessions was insufficient to yield a longer-term effect.

Conclusions: Frequent ancillary sessions may be unnecessary for slip-related fall prevention up to 4 months if the initial session intensity is sufficient. Furthermore, the minimum of a single slip may be as effective if the subject is exposed to frequent ancillary sessions.

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