@stellalili8: I got this 6lb steel speed arm trainer for my arms, but every rotation makes my core join in too. 💪🔥 The 8-shaped ring feels solid, and my forearms start working almost straight away. Small enough for home, but definitely not easy once the resistance kicks in. #SpeedArmTrainer #ArmWorkout #CoreEngaged #HomeFitnessFinds #TikTokMadeMeBuyIt