Here are three reasons to start taking cold showers if you are not already. They key is to get the water cold enough. See below for dialing in your shower limit stop.

• Metabolic advantage – Metabolic rate while unchanged at 90F spiked by 350% when exposed to 57F degree water. Scientific Evidence-Based Effects of Hydrotherapy on Various Systems of the Body
• Increased immunity – 29% reduction in sickness absence from work. The Effect of Cold Showering on Health and Work and Immune changes in humans during cold exposure: effects of prior heating and exercise
• Improved mood – Adapted cold shower as a potential treatment for depression.

Adjusting your shower is usually a matter of using a hex key to remove the set screw on the shower handle. Then adjust the rotational limit stop by gently pulling it out and turning it to the right a few clicks before re-inserting for colder water.