That being said, standing barbell wrist curls will help you place more emphasis on the contraction
than seated curls, but to enhance the contraction even further try resting your forearms on a bench or a decline bench.
Seated hammer
curls are stricter, meaning they isolate the bicep better, and place more stress on the muscle
than standing
curls, which allow the use of heavier weights but also tend to rely more on assisting muscles such as the back to
curl the weight.