Let's Play at Digging : How Vigorous Is This Energetic Task for a Young Forager?

Area of Science:

• Human Paleontology
• Anthropology
• Human Biology

Background:

• Extractive foraging, like digging for tubers, is common in hunter-gatherer societies.
• Children and adolescents frequently engage in tuber gathering, yet physical traits linked to digging proficiency are understudied.

Purpose of the Study:

• To investigate how age and energy expenditure impact digging performance in children and adolescents.
• To identify physical traits influencing the ability to perform extractive foraging tasks.

Main Methods:

• An experimental approach was used to evaluate the energetic cost of digging for simulated tubers.
• The study involved 40 urban children and adolescents (ages 8-14) of both sexes.
• Measurements included physical effort intensity and anatomical variables.

Main Results:

• Digging is a moderately vigorous activity for inexperienced children, demanding significant physical effort.
• Energy expenditure during digging varied between sexes and age groups, primarily influenced by body size and age.
• Proficiency in digging was achievable without prior training, with similar skill levels observed in both sexes.

Conclusions:

• Digging and tuber gathering are physically demanding tasks for juveniles, with energy expenditure significantly affected by body size and age.
• Factors such as strength and body size play a crucial role in the proficiency of young individuals in physically intensive foraging activities.
• The study underscores the energetic costs and physical demands of extractive foraging for children and adolescents.