Should You Take a Hot or Cold Bath After Your Workout?


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Nothing feels better than jumping into a cold pool after a steamy yoga flow — or soaking in a hot bath to wind down after a hard winter workout. And depending on how and when you use them, cold and hot baths can also reduce inflammation, boost recovery, and improve athletic performance, says runner and California-based licensed physical therapist Andrea Henry.

But which is best for muscle recovery after a workout? It turns out, they each have their place in your recovery arsenal. Make the most of each type of bath with recommendations on ideal uses, water temperature, duration, and more with tips from Henry and other experts.

What’s the difference between hot and cold baths?

Both hot and cold baths after a workout can be beneficial for a sore body. We look at when to use each (or when to alternate), plus what you can add to your bath water to make it really work for your body.

Cold baths

Experiencing inflammation from a lingering injury like plantar fasciitis or an ankle sprain? Henry recommends a cold bath — ideally at temperatures between 50 and 60 degrees Fahrenheit — for up to 15 minutes at a time. The cooler temperatures slow blood flow to the irritated area, “decreasing swelling and numbing pain,” she explains.

Research also shows that runners who regularly engaged in cold immersion therapy reported less delayed onset muscle soreness (DOMS) than those who simply rested. And according to a study published in the Journal of Physiology in 2015, cold baths aid in recovery from heavy weightlifting sessions and contribute to long term gains in muscle mass and strength.

But if your teeth chatter just at the thought of sinking into a full bath of ice water, there’s good news: submerging that sore foot or ankle in cold water is just as effective at minimizing pain and “calming minor niggles that could alter your gait and cause additional injuries, ”explains Henry.

If the injury is acute — say you tripped and sprained your ankle on a trail — skip the bath and opt for cold compression, which is “much more efficient at reducing swelling,” says Dr. Elizabeth Smith, a physical therapist at The Orthopedic Center in Huntsville, Alabama. There are some super fancy cold compresses made specifically for recovery these days, but feel free to stick with the tried-and-true ice pack.

Hot baths

To soothe the day-over-day stiff muscles, both Henry and Smith say a hot bath is the way to go. Ideally, the best temperature is between 98 and 105 degrees Fahrenheit, but Henry says to always defer “to your own comfort level.”

Much like taking a yoga class in a heated room helps you go deeper in a forward fold or lunge, immersion in hot bath water increases blood flow throughout the body, heating tendons, joints, and muscles, and “improving range of motion and movement, Henry explains.

And according to Atlanta-area psychologist Dr. Allison Christopher, “Regular evening baths can improve symptoms of depression, as the slight uptick in body temperature releases serotonin in the brain.” Taking a hot bath at night also releases melatonin, which “can synchronize your circadian rhythm,” she explains. Bottom line: You’ll relieve tense muscles and sleep better, both of which aid in recovery and make it easier to bounce back from a hard workout.

Baths don’t need to be just a post-workout treat. Similar to how a dynamic warm-up prepares the body for a workout, a pre-workout hot bath can loosen stiff joints and get blood flowing to achy muscles — making it easier to nail your splits while reducing your risk of injury, says Henry.

Contrast baths

When dealing with an acute injury like a sprained foot or ankle, Henry suggests trying a contrast bath: a mix of hot and cold therapies. After a few days of treating the injured area exclusively with cold water or compression, she then recommends alternating 3 to 4 minutes in warm water with 1 minute of cold water for a total of 20 to 30 minutes, always ending with cold water. This method works by constricting and then dilating blood vessels, “creating a pumping effect that increases blood flow and oxygenation of the blood, speeding up the healing process,” she says.

In 2013 review of contrast water therapy studies also found that it was more effective in decreasing lactic acid in muscles better than passive methods or rest.

But contrast therapy isn’t for everyone. Those with open wounds, cardiac dysfunctions, skin infections, diabetes, and other circulation conditions should avoid water temperature fluctuations, as well as extremely hot or cold bath water.

The ultimate recovery

While adding a fun scented bath bomb or a few drops of your favorite essential oil to bath water isn’t harmful, there isn’t any scientific benefit. Instead, Smith advises patients to use two cups of Epsom salts, which break down into magnesium particles that get absorbed into the body, relieving muscle cramping and speeding up recovery.

And to maximize both the mental and physical health benefits of bath time, put down the phone or tablet, advises Christopher.

“It’s easier to quiet the mind when you’re in a state of physical relaxation, so try listening to calming music or a guided meditation to help you wind down,” she says. Studies also show that for athletes, a regular meditation practice is linked to reduced stress levels, improved focus and concentration, and better sleepall of which can lead to better recovery and increased athletic performance.



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