Ah, the 10% rule of running for increasing mileage or run time. A very specific and objective piece of conventional wisdom handed down from each running generation to the next. Many have voiced both praise and disdain for the rule and it has even been used in some research studies.
I am currently in the process of rebuilding my running base after letting it dwindle to near zero over a 4-5 month span. I wanted to avoid doing too much too soon when I returned to running regularly and I like to experiment with ideas so I figured I would put the 10% rule to the test.
My rules for this were to run no more than 10% longer per longest run of the week or per week total. I was allowed to run less if needed and would only be running 3-4x a week. So far, after following this rule for several months I have been able to increase my total time very easily in terms of both aerobic and musculoskeletal comfort. There have been times of slight soreness but the kind you embrace or expect from a workout plan that gradually imposes increased demands or loads.
I must say that so far this base building has gone far easier than previous base building efforts. Previous attempts were plagued with issues like chronic compartment syndrome, plantar fasciosis, Achilles tendinopathy, Medial Tibial Stress Syndrome, and other common but nagging running injuries. My girlfriend has also been rebuilding her base alongside me. In the past she had a history of IT Band Syndrome/Patellofemoral Pain Syndrome issues and repeat stress fractures in high school. So far she has not had any problems arise either.
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| That is me in the white shirt and shorts on the far left, when I first started running. I definitely used to over-stride! |
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