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Contrast Therapy: What it is and when to use it

2/17/2020

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Ever wondered if you should ice that sprain or use a heat pack instead? Knowing when to apply heat and ice to injuries can be tricky. Knowing what situations calls for hot, and which calls for cold can be difficult. But what about using both together? Treating pain with hot and cold can be extremely effective for a number of different conditions and injuries, and easily affordable. 

Alternating hot and cold therapy is known as contrast therapy and involves alternating applications of heat and ice to relieve the pain associated with injury or overexertion. This simple, affordable, and relatively low-risk treatment can be performed in your own home to provide rapid and natural pain relief for all sorts of aches and pains. In order to understand the benefits of contrast therapy, it’s beneficial to know exactly when and why heat and ice work for pain relief—and when they don’t.

HEAT THERAPY: How it works
Heat therapy works by improving circulation and blood flow to a particular area due to increased temperature. Increasing the temperature of the afflicted area even slightly can soothe discomfort and increase muscle flexibility. It can also relax and soothe muscles and heal damaged tissue. 
There are two different types of heat therapy: dry heat and moist heat. Both types of heat therapy should aim for “warm” as the ideal temperature instead of “hot.” There are certain cases where heat therapy should not be used, however. For example, if the area in question is either bruised or swollen (or both), it may be better to use cold therapy. Heat therapy also shouldn’t be applied to an area with an open wound. In addition, people with certain pre-existing conditions should not use heat therapy due to higher risk of burns or complications due to heat application. These conditions include:
  • diabetes
  • dermatitis
  • vascular diseases
  • deep vein thrombosis 
  • multiple sclerosis (MS)

COLD THERAPY: How it works
Cold therapy, also known as cryotherapy, works by reducing blood flow to a particular area, which can significantly reduce inflammation and swelling that causes pain, especially around a joint or a tendon. It can temporarily reduce nerve activity, which can also relieve pain. There are a number of different ways to apply cold therapy to an affected area. Treatment options include:
  • ice packs or frozen gel packs
  • coolant sprays
  • ice massage
  • ice baths
People with sensory disorders that prevent them from feeling certain sensations should not use cold therapy at home, because they may not be able to feel if damage is being done. This includes diabetes, which can result in nerve damage and lessened sensitivity. You should not use cold therapy on stiff muscles or joints, and cold therapy should not be used if you have poor circulation. 

Which Injuries Does Contrast Therapy Work Best For?
Contrast therapy will relieve pain and swelling associated with a variety of injuries. This versatile treatment can be used for a variety of conditions, including:
  • Strains and sprains of the foot, ankle, elbow, knee, wrist, neck, or shoulder
  • Swelling (once the acute stage has passed)
  • Muscle spasms
  • Joint aches
  • Repetitive-strain injuries, such as tendonitis or tennis elbow
  • Sports injuries
  • Flare-ups of chronic conditions, such as arthritis or fibromyalgia
  • Some pains associated with cancer
  • Any other injury that causes swelling or aching
Many athletes are known to take ice baths after training to lower inflammation, improve circulation, and reduce lactic acid build-up. Hot and cold therapy may be effective in aiding recovery by reducing levels of both lactic acid and muscle soreness. Also, it may be particularly beneficial for those who have a second workout planned for later in the day, as it doesn’t shut the body down in the way pure ice therapy does.

Better Together: Alternating Hot and Cold Therapy
Alternating hot and cold therapy offers benefits above and beyond ice or heat alone, although it’s important to avoid this treatment if you have an acute injury or certain medical conditions. For most people, contrast therapy offers an easy and cheap way to lower inflammation, loosen muscles, and enjoy natural pain relief. Perseverance is key to effective contrast therapy. If you’re seeing benefits, keep up the treatments until you are fully healed.

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