What is "sub-failure"? Is that like taking a test and getting a D+?
Sub-failure, when it comes to injury, is common. There is usually pain or discomfort involved, but there is not an acute failure of the tendon, ligament, muscle, disc, or bone. It is more of a disruption in the fibers of the connective tissue. This causes a problem in the way these fibers line up and work together.
Imagine a forest full of trees. If a significant portion were cut or burned down, that would be a failure. Now imagine that none of them are cut or burned down... but the ground underneath is so soft and the trees are so big that some of the trees are almost uprooted and are leaning on other trees. We do not imagine a complete failure here, but we do imagine a major structural and functional problem. This could be considered a sub-failure in the forest system.
Now imagine a muscle full of hundreds of thousands of muscle fibers. You might image that a complete failure might include a tear in the muscle, or a tear of the tendon that attaches the muscle to the bone. Instead, what if none of the fibers were torn, but were pulling each other in different directions causing pain, spasm, and discomfort? MRI or CT scan would reveal a muscle "WNL" or, "within normal limits". The person may feel pain, discomfort, spasm, and decreased strength. We do not imagine a complete failure here, but we do imagine a structural and functional problem. This could be considered a sub-failure injury.
Several different studies (1,2,3,4) reveal that an estimated 85% of patients with low back pain do not have a definitive diagnosis. That is because the model of injury is flawed and outdated. When we take a step back to see the forest through the trees we can see that sub-failure injury is a common problem in these cases.
Many health care practitioners who work with athletes can help with this, including chiropractors, physical therapists, massage therapist, acupuncturists, and medical doctors. Ask around and find a good one. (Your health care provider will also rule out more rare and serious causes of low back pain.)
Another person who can help your body heal from sub-failure injury is your friendly neighborhood Crossfit coach. They teach you to move your body with proper position and form through full range of motion to train your muscles and joints to work together. They will help, but they can not do it for you. Don’t be afraid to take a step back in your training. Focus on form and technique through complete range of motion. Focus on form first, and then build intensity. The results will be astounding.
Last but not least you should include at least these two things in your arsenal for rehab and recovery. Every Crossfitter should own a foam roller and an ice pack. In true Crossfit style these two items are incredibly effective, widely available, and very affordable. Foam rolling helps break up fibrous adhesions and spasm that prolong healing. Ice reduces pain and inflammation.*
The number one person who helps you heal from sub-failure is you. You eat the food. You get the rest. You do the exercises. Whether or not you ask for help, you work through your own rehab and recovery. How you do each one of these is up to you.
*Contraindications to foam rolling may include fracture, bleeding, burns, broken bones, cancer, osteoporosis, acute infectious disease, open lesions or sores, blood clots, or varicose veins. Contraindications to ice may includeprevious history of frostbite, conditions or diseases of decreased circulation such as Raynaud’s disease or diabetes, metabolic conditions such as gout or rheumatoid arthritis, or if you are really, really cold.
(1) Bigos, S MD "Acute Low Back Pain in Adults" Clinical Practice Guideline No. 14. AHCPR Publication No. 95–0642,Dec. 1994
(2) Devo, R MD, MPH Scientific American August 1998; p 48-53
(3) Kool, Jan et al. Journal of Rehabilitation Medicine 2004; 36: 49-62
(4) Wiesel, S MD, “Diagnostic Precision Still Elusive. Backletter 2005; 20(4): 48