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The COL5A1 gene is associated with the synthesis of type V collagen, a key constituent of ligaments and tendons. Specific alleles of this gene are known to either increase or decrease the risk of injury.
| CHIP Version | COL5A1 SNPs |
| 23andMe (Use your 23andme raw data to know your COL5A1 Variant) | |
| v1 23andme | Present |
| v2 23andme | Present |
| v3 23andme | Present |
| v4 23andme | Present |
| V5 23andme (current chip) | Present |
| AncestryDNA (Use your ancestry DNA raw data to know your COL5A1 Variant) | |
| v1 ancestry DNA | Present |
| V2 ancestry DNA (current chip) | Present |
| Family Tree DNA (Use your FTDNA raw data to know your COL5A1 Variant) | |
| OmniExpress microarray chip | Present |
A study conducted on people with Achilles tendinopathy showed that those with the CC genotype of COL5A1 were associated with a lowered risk of developing Achilles tendinopathy compared to people with the T variant. Similar results were seen among people with anterior cruciate ligament injuries, again people with the CC genotype were found in lower numbers in a group of people with an ACL injury.
In terms of flexibility, people with the T variant of the gene are associated with a lower range of motion, implying that they could be less flexible. People with the TT genotype have tendons that are stiffer than those with the CC genotype. The stiff tendons and the lowered range of motion could be the reason behind the potential increase in the risk of injury among people with the TT genotype.
Stiffer Achilles tendons have an increased capacity to store and return energy thus providing an advantage in endurance running. This would mean that people with stiff Achilles tendons would require a lower amount of energy for every step, making such runners more efficient. This is what makes people with the T variant (less flexible) better suited for long-distance running events. Support for this theory comes from an ultra-marathon running study conducted in 2011. The study reported that people with the T variant had stiffer tendons but finished significantly faster than people with the C variant of the gene Col5A1.
In a study conducted on people with a self-reported history of exercise-associated muscle cramping, people with the C variant were shown to be over-represented among people with no history of exercise-associated muscle fatigue.
| Genotype | Phenotype | Recommendations |
| TT | [Limitation] More likely to have stiff tendons and increased risk of injuries and tendinopathies. [Limitation] Likely to have decreased range of motion (flexibility) [Advantage] Better endurance [Limitation] More likely to have a higher risk of muscle fatigue/ muscle cramping | Likely better at endurance running than the C variant Increased risk for injuries - warm-ups and stretching before workouts are important to avoid injury. Recuperative therapies such as massages can help |
| CT | [Limitation] More likely to have stiff tendons and increased risk of injuries and tendinopathies. [Limitation] Likely to have decreased range of motion (flexibility) [Advantage] Better endurance [Limitation] More likely to have a higher risk of muscle fatigue/ muscle cramping | Likely better at endurance running than the C variant Increased risk for injuries - warm-ups and stretching before workouts are important to avoid injury. Recuperative therapies such as massages can help |
| CC | [Advantage] More likely to have an increased range of motion (Flexibility) [Advantage] Lower risk of ACL injuries and Tendinopathies [Limitation] Lower endurance [Advantage] More likely to have a lower risk of muscle fatigue/ muscle cramping | Greater flexibility due to an increased range of motion allows you to perform a variety of different exercises easily. Lower risk of injury allows you to remain active and train often. |
“Nutrigenetics, fitness genetics, health genetics are all nascent but rapidly growing areas within human genetics. The information provided herein is based on preliminary scientific studies and it is to be read and understood in that context.”
