Both types of garage door springs are under high tension, which enables them to counterbalance the weight of the garage door. However, due to the significant force involved, garage door spring replacement or repair should be left to trained professionals. Attempting to adjust or replace these springs without the proper knowledge and tools can be extremely dangerous and can result in serious injury or damage to the door. Regular maintenance and safety checks of garage door springs are essential to ensure they are in good working condition, contributing to the overall safety and functionality of the garage door system.