Santa Barbara, CA – A surprising anthropological study has revealed that chopping wood – a task often associated with survival and daily labor – can trigger a sharper rise in testosterone than competitive sports like soccer.

Field Research Among the Tsimane

Researchers from the University of California, Santa Barbara (UCSB) conducted the study among the Tsimane, an indigenous group living in the Bolivian Amazon. The Tsimane maintain a traditional lifestyle that combines farming, hunting, and foraging, making them ideal subjects for examining how physical activities influence human biology.

To measure hormonal changes, the team collected saliva samples from men before and after they engaged in two activities: one hour of chopping wood and one hour of playing soccer.

• After chopping wood, testosterone levels spiked by an average of 46.8%.

• After playing soccer, levels rose by about 30.1%.

The results show that chopping wood, despite being non-competitive, elicits a stronger acute testosterone response than a competitive team sport.

Why Woodcutting Matters

Lead researcher Ben Trumble and his colleagues suggested that the effect is tied to the survival importance of the activity. For the Tsimane, chopping wood provides essential resources such as firewood for cooking and warmth. The body’s elevated testosterone response may reflect the evolutionary need to meet the high physical demands of labor that directly sustains life.

Unlike modern exercise routines, woodcutting combines strength, endurance, and functional movement, making it a natural form of resistance training.

Not a Long-Term Hormone Boost

The researchers caution that these testosterone spikes are short-term effects. They do not mean that chopping wood will permanently raise hormone levels. Rather, the study highlights how different types of physical exertion can trigger varied hormonal responses depending on context, intensity, and purpose.

Broader Implications

The findings challenge the assumption that sports competition is the ultimate driver of testosterone surges. In fact, daily labor with direct survival value may provoke even stronger biological reactions.

“Testosterone is not just about competition or mating displays,” the researchers noted. “It’s also about enabling men to perform critical tasks that support their families and communities.”

This study underscores how traditional labor can provide both functional benefits and unique physiological effects – a reminder that survival-driven effort may carry as much weight as play when it comes to the human body’s hormonal responses.