Barbell Preacher Curl: Do your wrists bend backward?
Keep your wrists in line with your forearms. Do not bend them backward.
How to fix it
- Sit with the backs of your upper arms against the pad.
- Keep your wrists in line with your forearms.
- Lift by bending only your elbows, then slowly lower the bar.
The app sets the reps for your next set
(For exercises you added to your routine yourself) For example, if you are a beginner and completed all 13 reps in each set at 20kg as planned in your last workout, the app keeps the weight the same and increases your reps to 14. When you log your sets, GYMKC reads your last set and recalculates the weight and reps for your next set.
Get GYMKC on the App StoreHow slowly should you lower the bar?
Sources that explain curl technique (ACE and Mayo Clinic) say to lower slowly and with control, without specifying a number of seconds. One study on preacher curls (Nunes et al. 2020) used 1 second to lift and 2 seconds to lower.
See this exercise in detail
More on the same body part
Sources
- Roberts TD et al., Journal of Sports Science and Medicine (2024)
- Piper TJ et al., International Journal of Strength and Conditioning (2021)
- Vasconcelos T et al., Muscles (2026)
- Nunes JP et al., International Journal of Environmental Research and Public Health (2020)
- Western Illinois University, NSCA Lifting Proficiencies · Biceps Arm Curl
- ACE, Exercise Library · Seated Biceps Curl
- ExRx.net, Barbell Preacher Curl
- Mayo Clinic, Biceps curl with barbell
This article is based on our analysis of public content from evidence-based training experts in Korea and abroad. It is not a substitute for medical advice.