Why could I lift 10 kgs on each bicep with the biceps curl machine and not with dumbbells

There are several reasons why you may be able to lift more weight on a biceps curl machine than with dumbbells:

Fixed Range of Motion: Biceps curl machines restrict the range of motion of the exercise, reducing the distance the weight needs to be lifted. This can make the exercise easier and allow you to lift more weight.
Stability and Support: Machines provide more stability and support than dumbbells, which can help you maintain proper form and prevent excessive movement. This increased stability can allow you to lift heavier weights without compromising technique.
Mechanical Advantage: Biceps curl machines often use a leverage system that provides a mechanical advantage. This means that you need to exert less force to lift the same weight compared to dumbbells.
Fatigue: When using dumbbells, you have to stabilize the weight throughout the range of motion, which can lead to muscle fatigue. This fatigue can reduce your ability to lift as much weight as you could on a machine.
Mind-Muscle Connection: Machines isolate the biceps muscle more effectively than dumbbells, which can help improve the mind-muscle connection and allow you to focus on contracting the biceps more efficiently.

Related Questions and Answers:

What is the best way to improve biceps strength? Consistency and progressive overload are key.
Should I use machines or dumbbells for biceps exercises? Both have their benefits, so incorporate both into your routine.
How many sets and reps should I do for biceps curls? Aim for 3-4 sets of 8-12 repetitions.
What is the difference between a bicep curl and a hammer curl? Bicep curls target the long head of the biceps, while hammer curls target the brachialis and short head of the biceps.
How often should I train my biceps? Aim to train your biceps 1-2 times per week.

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