The Claim
In healthy young adult males walking at 5 km/h on level ground, carrying a weighted vest increases metabolic rate in a quadratic manner with load mass, such that energy expenditure rises disproportionately beyond 15 kg, while heart rate increases linearly with load mass.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
When healthy young men walk at 5 km/h on flat ground while wearing a weighted vest, their energy use increases more than proportionally as the weight goes above 15 kg, and their heart rate increases in direct proportion to the added weight.
See the scientific wording
In healthy young adult males, carrying a weighted vest increases metabolic rate in a quadratic manner with load mass, meaning energy expenditure rises disproportionately as load increases beyond 15 kg, while heart rate increases linearly, indicating a proportional cardiovascular response to added weight during walking at 5 km/h on level ground.
When a person carries a heavy vest while walking, the weight squeezes the chest, making it harder to breathe deeply. This forces the breathing muscles to work much harder, burning more energy — especially as the weight gets heavier, causing energy use to spike faster than the weight increases. At the same time, the body needs more oxygen to fuel this extra effort, so the heart beats faster at a steady rate with every extra kilogram, matching the rising need without sudden jumps.
What the research says
1 studyWhen young men walk with a heavy backpack, their body burns energy faster and faster the heavier the pack gets — especially past 15 kg — but their heart beats steadily faster with each extra kilo, not jumping suddenly.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.