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It is unfortunate that the EXPRES test/20 MSR get such a bad reputation as a fitness evaluation. The reality is that it is a very good general fitness test (It is not a specific test like the BFT). Consider the following:
1) The 20MSR is a measure of VO2 max. VO2 max is the maximum amount of oxygen one can consume relative to their body. In simple terms it is your aerobic capacity or aerobic potential. A good analogy would be the compare VO2 to the Horse Power of an engine. The higher the HP, the more work an engine can produce. Similarly, the higher ones VO2 max is, the more physical work they can do.
2) During the original studies conducted by Leger et al. back in the 80's showed that, with a large sample population, the 20MSR acheived 97% accuracy in predicting ones actual VO2 max. Basically they compared the stage participants ran to, to their actual laboratory calculated VO2 max. This is a very strong correlation when compared to other test like the Step Test that only shows 68% accuracy in predicting VO2max.
3) In May 2010 I personally validated this. I conducted the 20MSR to max effort and it was determined that my VO2 max was 56.6 ml/kg/min. One week later I had the opportunity to conduct a Laboratory VO2 max with a gas exchange monitor. My VO@ max was determined to be 56.7ml/kg/min. That is 99.8% accurate. Pretty good test!
Do soldiers run back and forth 20m at a time on a daily basis? Probably not. Are soldiers required to do work that involves an elevated/significant aerobic ability? ABSOLUTELY!
1) The 20MSR is a measure of VO2 max. VO2 max is the maximum amount of oxygen one can consume relative to their body. In simple terms it is your aerobic capacity or aerobic potential. A good analogy would be the compare VO2 to the Horse Power of an engine. The higher the HP, the more work an engine can produce. Similarly, the higher ones VO2 max is, the more physical work they can do.
2) During the original studies conducted by Leger et al. back in the 80's showed that, with a large sample population, the 20MSR acheived 97% accuracy in predicting ones actual VO2 max. Basically they compared the stage participants ran to, to their actual laboratory calculated VO2 max. This is a very strong correlation when compared to other test like the Step Test that only shows 68% accuracy in predicting VO2max.
3) In May 2010 I personally validated this. I conducted the 20MSR to max effort and it was determined that my VO2 max was 56.6 ml/kg/min. One week later I had the opportunity to conduct a Laboratory VO2 max with a gas exchange monitor. My VO@ max was determined to be 56.7ml/kg/min. That is 99.8% accurate. Pretty good test!
Do soldiers run back and forth 20m at a time on a daily basis? Probably not. Are soldiers required to do work that involves an elevated/significant aerobic ability? ABSOLUTELY!