![]() To be brief, VO2 max is an individual’s maximum ability to transport and use oxygen during exercise ( here’s more information if you need). When we look at the effects of taking time off from running, we have to analyze the detraining from two perspectives: (1) your metabolic systems such as aerobic fitness, threshold and VO2 max and (2) your structural systems such as your muscles and neuromuscular coordination (how fast and efficiently your brain can tell your body to perform and execute a specific movement).Įffect of detraining on the aerobic systemīecause VO2 max is one of the best measurements of a runners physical fitness, I will use it as the baseline to compare the effects of detraining on your aerobic system. However, I wanted to share this story with you to demonstrate that I write this article with the deepest understanding of how hard it can be to listen to science and understand that a day off isn’t going to end your hopes of running as fast as you’ve dreamed. Luckily, I didn’t suffer any lingering affects from the imbalances I created by running with one arm. ![]() Not wanting lose any precious training time, I strapped my left arm tight across my body using a combination of saran wrap and duct tape and went on a 12-mile run the next morning. The doctors told me I needed to take a few days off to let the shoulder heal. While I was training for the NCAA championships while in college, I had a swimming accident that left my left shoulder separated and required a visit to the hospital to get it back in place. As runners, we are all paranoid about taking a few days off, generally thinking it will ruin our months of meticulous training.Īs a coach, I am not immune to being frightened by this irrational fear. It’s one of the most common questions I get from runners struggling with an injury, fighting the flu, or hesitant to take a much needed rest from training. How much will taking a few days off from running hurt my fitness?
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