Aqualogix Low Resistance "High Speed" Bells: Ideal for those focused on rehab, recovery or speed work. The Aqualogix Low Resistance "High Speed" Bells are perfect for those just starting out on their fitness journey, or for those looking to do a lot of recovery or high-speed work. They provide the least amount of resistance allowing the user to do fast upper body movements, igniting the small fast twitch muscles for explosive power and speed.