Why Can't I Lift More with a Barbell Than Dumbbells?

  • Context: High School 
  • Thread starter Thread starter AFG34
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Discussion Overview

The discussion centers around the differences in lifting capacity between barbells and dumbbells, particularly in the context of weightlifting exercises such as curls and bench presses. Participants explore potential reasons for discrepancies in lifting performance with these two types of equipment.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant questions why they can lift 40 pounds with each dumbbell but struggle to lift 80 pounds with a barbell.
  • Another participant suggests that the weight of the barbell itself may be greater than the combined weight of the dumbbells, depending on how the weights are measured.
  • It is proposed that the method of holding the weights could influence muscle engagement and strain, affecting lifting capacity.
  • A later reply indicates that generally, individuals can lift more with a barbell due to the stabilization it provides, which may enhance structural strength during lifts.

Areas of Agreement / Disagreement

Participants express differing views on the reasons for the lifting capacity differences, with no consensus reached on the primary factors influencing performance.

Contextual Notes

Participants do not clarify whether the weights mentioned include the weight of the equipment or not, which may affect the discussion. Additionally, the specific mechanics of muscle engagement with different lifting methods remain unresolved.

AFG34
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If i can do 40 pounds with each hand with dumbells, then how come i can't do 80 pounds using both hands with a barbell?
I am sorry if this is in the wrong section, please feel free to move it.
 
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Well, when you say 40lbs, do you mean that you have 40lbs of weight hanging on the dumbells, or do you mean 40lbs including the dumbells? If you mean the former, then it may be that the barbell simply weighs more than the two dumbells put together.

Another issue may be the way you hold the barbell and dumbells. Lifting weight with different ways of holding it may work different segments of muscle or put more strain on a muscle than the other method of holding the weight. This can affect your ability to lift the weight as well.
 
interesting answer...thanx
 
Generally, people can curl more with a barbell than with dumbells because the bar stabilizes the muscles. The same goes for a bench press vs dumbell press.

It is a structural thing - the more constrained the motion is, the stronger the structure.
 

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