Load Carriage Modes and Limb Crossing Patterns Altered Gait during Obstacle Negotiation

Area of Science:

• Biomechanics
• Gerontology
• Human Movement Science

Background:

• Falls are a significant risk during obstacle negotiation, influenced by personal and environmental factors.
• Understanding gait adaptations is crucial for fall prevention strategies, especially in aging populations.

Purpose of the Study:

• To investigate the effects of age, load carriage, and limb dominance on gait parameters during obstacle negotiation.
• To analyze how step length, toe clearance, step velocity, and step width are affected by these factors.

Main Methods:

• Eighteen male participants (seven older, eleven young) performed obstacle negotiation tasks.
• Gait parameters (step length, toe clearance, step velocity, step width) were measured with and without hand loads.
• Tasks were initiated with either the dominant or non-dominant leg.

Main Results:

• Older adults demonstrated increased toe clearance compared to younger adults.
• Hand loads significantly altered step length and toe clearance.
• Gait parameters differed between dominant and non-dominant limb crossings.

Conclusions:

• Age, load carriage, and limb dominance are critical factors influencing gait stability during obstacle negotiation.
• Findings suggest distinct biomechanical strategies employed by older adults and when carrying loads.
• These insights can inform the design of interventions to reduce fall risk in diverse populations.