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<blockquote data-quote="gioca63" data-source="post: 6874775" data-attributes="member: 15179"><p>Da trainingpeaks.com</p><p></p><p>What is Functional Threshold Power?</p><p>Functional Threshold Power was developed by Dr. Andrew Coggan and is specifically defined as “the highest power a rider can maintain in a quasi-steady state without fatiguing.” It is an estimate of the power output that corresponds most closely with the maximal metabolic steady state or metabolic control limit, or what is more commonly referred to as “threshold.” In contrast to VO2max, which is primarily limited by the cardiovascular system’s ability to deliver O2-carrying blood to contracting muscle, this threshold is primarily determined by muscular metabolic fitness, i.e., the ability to balance aerobic <a href="http://home.trainingpeaks.com/blog/article/exercise-metabolism-for-cyclists" target="_blank">ATP</a> production via mitochondrial respiration with ATP utilization.</p><h3>What Does Threshold Mean?</h3><p>This second, higher, exercise intensity can be estimated or determined in various ways, but the most direct, and hence most accurate, approach is to simply have an individual perform a series of longer (typically 30 minutes) efforts at constant intensity and measure blood lactate throughout exercise. The highest exercise intensity at which blood lactate levels are stable (or quasi-stable) represents the athlete’s maximal lactate steady state (MLSS). MLSS represents the highest exercise intensity at which the rate of lactate clearance matches the rate of lactate production, and corresponds to an exercise intensity that can typically be maintained for 30 to 60 minutes, though some scientists say 40 to 70 minutes.</p><h3>Sustaining Functional Threshold Power</h3><p>As noted, MLSS is an exercise intensity that can typically be sustained for 30 to 70 minutes. Since FTP is a simplified tracking metric of MLSS, it has the same sustainable time range (not specifically one hour, as often stated by others). Since this roughly corresponds to the duration required to complete a 40km time trial, the latter provides an excellent estimate of power at MLSS, especially when you consider how flat the power-duration relationship is in this region. In addition to improved metabolic fitness being reflected in a higher power at MLSS/FTP, however, training also tends to improve the duration that exercise at this intensity can be maintained.</p><p></p><p>This kink or defection point is representative of the athlete’s Time to Exhaustion (TTE) and is a measurement of the maximum duration for which a power equal to FTP can be maintained. Although this range can be from 30 to 70 minutes, for many training athletes, it typically falls in the range of 40 to 55 minutes, which is one of the reasons why it is often associated with an hour, and why 40km (really ~40 km, since few courses are measured precisely) time trial power was originally proposed as the best estimate.</p><h3>Introduction of Time to Exhaustion (TTE) Metric</h3><p>In a recent update of WKO4, Dr. Andrew Coggan introduced the newest Power Duration metric, Time to Exhaustion (TTE). It is defined as:</p><p><em>The maximum duration for which a power equal to model-derived Functional Threshold Power can be maintained.</em></p><p><em></em></p><p><em> Visto che dalla pubblicazione del libro la terra ha fatto diversi giri intorno al sole e coggan nel fattempo si e accorto che per legare ftp a qualcosa di fisiologico non poteva bloccare ftp a test di un ora, ha apportato qualche modifica al suo impianto teorico compreso la durata di ftp da 30 a 70 minuti</em></p><p> <em>visto che sopra hai lincato alcuni allenamenti che fai per far vedere quanto sei forte ti consiglio di invbestire in questo:</em></p><p><em><a href="https://www.amazon.it/dp/B00RVM77JW/?tag=mmc08-21" target="_blank">https://www.amazon.it/dp/B00RVM77JW/?tag=mmc08-21</a></em></p><p><em>magari dividi le spese con il mitico [USER=47842]@mag[/USER] cosi le ripetute ti escono meglio</em></p></blockquote><p></p>
[QUOTE="gioca63, post: 6874775, member: 15179"] Da trainingpeaks.com What is Functional Threshold Power? Functional Threshold Power was developed by Dr. Andrew Coggan and is specifically defined as “the highest power a rider can maintain in a quasi-steady state without fatiguing.” It is an estimate of the power output that corresponds most closely with the maximal metabolic steady state or metabolic control limit, or what is more commonly referred to as “threshold.” In contrast to VO2max, which is primarily limited by the cardiovascular system’s ability to deliver O2-carrying blood to contracting muscle, this threshold is primarily determined by muscular metabolic fitness, i.e., the ability to balance aerobic [URL='http://home.trainingpeaks.com/blog/article/exercise-metabolism-for-cyclists']ATP[/URL] production via mitochondrial respiration with ATP utilization. [HEADING=2]What Does Threshold Mean?[/HEADING] This second, higher, exercise intensity can be estimated or determined in various ways, but the most direct, and hence most accurate, approach is to simply have an individual perform a series of longer (typically 30 minutes) efforts at constant intensity and measure blood lactate throughout exercise. The highest exercise intensity at which blood lactate levels are stable (or quasi-stable) represents the athlete’s maximal lactate steady state (MLSS). MLSS represents the highest exercise intensity at which the rate of lactate clearance matches the rate of lactate production, and corresponds to an exercise intensity that can typically be maintained for 30 to 60 minutes, though some scientists say 40 to 70 minutes. [HEADING=2]Sustaining Functional Threshold Power[/HEADING] As noted, MLSS is an exercise intensity that can typically be sustained for 30 to 70 minutes. Since FTP is a simplified tracking metric of MLSS, it has the same sustainable time range (not specifically one hour, as often stated by others). Since this roughly corresponds to the duration required to complete a 40km time trial, the latter provides an excellent estimate of power at MLSS, especially when you consider how flat the power-duration relationship is in this region. In addition to improved metabolic fitness being reflected in a higher power at MLSS/FTP, however, training also tends to improve the duration that exercise at this intensity can be maintained. This kink or defection point is representative of the athlete’s Time to Exhaustion (TTE) and is a measurement of the maximum duration for which a power equal to FTP can be maintained. Although this range can be from 30 to 70 minutes, for many training athletes, it typically falls in the range of 40 to 55 minutes, which is one of the reasons why it is often associated with an hour, and why 40km (really ~40 km, since few courses are measured precisely) time trial power was originally proposed as the best estimate. [HEADING=2]Introduction of Time to Exhaustion (TTE) Metric[/HEADING] In a recent update of WKO4, Dr. Andrew Coggan introduced the newest Power Duration metric, Time to Exhaustion (TTE). It is defined as: [I]The maximum duration for which a power equal to model-derived Functional Threshold Power can be maintained. Visto che dalla pubblicazione del libro la terra ha fatto diversi giri intorno al sole e coggan nel fattempo si e accorto che per legare ftp a qualcosa di fisiologico non poteva bloccare ftp a test di un ora, ha apportato qualche modifica al suo impianto teorico compreso la durata di ftp da 30 a 70 minuti visto che sopra hai lincato alcuni allenamenti che fai per far vedere quanto sei forte ti consiglio di invbestire in questo: [URL]https://www.amazon.it/dp/B00RVM77JW/?tag=mmc08-21[/URL] magari dividi le spese con il mitico [USER=47842]@mag[/USER] cosi le ripetute ti escono meglio[/I] [/QUOTE]
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