Development Team Member
Registered: 1365967610 Posts: 54
Hi, I need a bit of help here with finding the limiter as I am rather confused with two pictures from the same athlete who is a cross country skier. So first picture, athlete was not well rested before the start of this session, he's coach wanted him to do a 8min level 3 session up a long hill of which he managed 4 sets before bonking. Rest periods are not all the same, some he stood around, some he continued to ski. After his last set where he was totaly wasted he continued up the hill at a snails pace stopping every few minutes which can be seen by the little spike towards the end. Lets call this pic hitting the limit. Below is from two days later doing a modified 5/1/5 assessment due to the terrain. I felt his zones that was given to him was too high so made him ski even slower than his level one which is marked as skiing on flat v easy. Then onto what he thought his calculated level one was with 3x at this intensity (one set was about 10 min long due to terrain. Set two was his usual level 2 with 3x at level 2 with 1 min break. From then on it was the usual double step assessment, set 5 he could only complete 1 step. Below is the same as above but with heart rate, smo2, oxy and deoxy. So here is my take on the above, and I think I am seeing multiple limitations. Looking blindly at the hitting the limit picture first pic. He was was on a moderately hard session but due to him being tired potential showed his limiter much clearly than when he was rested. He is able to desaturate but only up to a point. So a moderately developed utilization system. Looking at only the thb. The more he pushes the more the blood flow drops and remains low, even after he has finished his last rep of 8min his Smo2 and thb does not recover, thb does not recover at all. I see this as a cardiac delivery limitation. He does have a very high heart rate even resting so his CCT theoretically could also be sky high. I think also coupled with how quickly his Smo2 drops and that it stays down that there is a compression issue (muscle strength/tension). Now looking at the modified 5/1/5 his smo2 has a similar pattern to when he is tired. Moderatly developed utilisation. His Smo2 does recover this time much better than when he was tired but still not enough for how easy he was skiing. thb now this is what is confusing me especially compared to the first picture, as thb seems to be good, delivery does not seem to be a problem here. I can not really make any sense of this compared to pic one. Blood saturation stayed stable around 98% all the way through upto the last rep where it suddenly dropped to 86%!! I thought this was a error, once he was back at the car and had stood around for a while I took another reading and it was 93% so it could be right. Last pic looking at oxy and deoxy: During his first easy step he is using more than can be delivered, alarm phase? Then second step he is 'warmed up' and delivery is more than he was using in his very easy skiing and then after this step never again except during the 1min recovery up to the 6th 1 min recovery he was able to recover getting delivery above utilisation. Which give some recovery and warmup guidance when he'd does do intervals in this intensity. What do you see in the above and please help me out with the thb in the 5/1/5 compared to pic one.
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Development Team Member
Registered: 1380484167 Posts: 1,501
Marcel super interesting case and I will get into depth on this from my point of view.
First like to add some information for regular readers. Marcel is one of the fist if not the first world wide, who did field test on roller skies combining VO2 equipment with Physio flow and NIRS ( Portamon) on the street with a guy ( helicopter pilot ) form Abu Dhabi Mr. Duncan Clark ) Marcel may even have some pictures. So when ever people read accepted paper claiming this is the first time and so on, always keep in mind that there may be a small group and some crazy people out there who have done it just for the purpose of research without the need to be mentioned. In practical applications and n the real world there are many people out there trying out interesting ideas to just please their own hunger for more information. Marcel is one of this super interesting and great people. 2. The data from Marcel's case show the fundamental difference between what we try to achieve when planning workouts , meaning looking for physiological ideas and targets , versus the accepted d classical idea, where we take performance and performance means to stimulate something you simply have to overload all but no matter what. So when I go through the data it is NOT a critic what coaches do but more what may be combined in the future to avoid certain problems we simply do not like to discus in so called healthy people.