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Activity management based on 2-day cardiopulmonary exercise testing results
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==Theory== In "Conceptual model for physical therapist management of [[ME/CFS|chronic fatigue syndrome/myalgic encephalomyelitis]]" by [[Todd Davenport | Todd E. Davenport]], [[Staci Stevens | Staci R. Stevens]], [[Mark VanNess | Mark J. VanNess]], [[Christopher Snell | Christopher R. Snell]], and Tamara Little, recommendations are divided into two categories: [[pacing]] self-management and therapeutic [[exercise]].<ref>http://ptjournal.apta.org/content/90/4/602.long</ref> Pacing self-management focuses on staying below the anaerobic threshold (AT) [[Heart rate variability|heart rate]], as determined by a [[two-day cardiopulmonary exercise test|2-day CPET]]. Strategies include wearing a [[heart rate monitor]], frequent breaks including diaphragmatic breathing, alternate positions, and use of adaptive equipment, and keeping an activities log to further identify activities that induce [[post-exertional malaise]] [[PEM]]. Therapeutic exercise is designed to prevent excessive use of the aerobic respiration system. They recommend starting with stretching and active range of motion exercises. When these are well tolerated without triggering PEM, the patient can move on to strength training: short duration, low intensity strengthening exercises with adequate rest intervals. Finally, patients can advance to short duration, low intensity interval training. Patients who can tolerate this can move on to short-duration aerobic interval training. In all these stages, interval duration should be under 2 minutes, and the heart rate kept at 10% below the AT. The paper stresses caution and slow changes, as tolerated. In the absence of [[two-day cardiopulmonary exercise test|2-day CPET]] results, they suggest 3 methods of estimating the anaerobic threshold (AT) heart rate: * estimating the AT from [[VΜO2 Max]] measurements obtained during submaximal exercise testing; * the heart rate corresponding to Borg Rating of Perceived [[Exertion]]<ref>http://sportsmedicine.about.com/cs/strengthening/a/030904.htm</ref> ratings of 13 to 15 during submaximal exercise testing may be used. * estimating the heart rate at AT by calculating 55% of the HR at the VΜo2max as a starting point, although specific establishment of the HR at the AT in this population requires additional research. In the general population, this is calculated by the formula (220-age) * 0.55. In "Functional Outcomes of Anaerobic Rehabilitation in a Patient with [[Chronic fatigue syndrome|Chronic Fatigue Syndrome]]" by [[Staci Stevens]] and [[Todd Davenport]] recommendations for an [[ME/CFS]] patient were again divided into two categories, pacing self-management and therapeutic exercise.<ref>http://iacfsme.org/ME-CFS-Primer-Education/Bulletins/BulletinRelatedPages2/FUNCTIONAL-OUTCOMES-OF-ANAEROBIC-REHABILITATION-IN.aspx</ref> [[Pacing]] self-management focused on keeping the heart rate below the ventilatory threshold, and using diaphragmatic breathing.<ref>http://www.cortjohnson.org/blog/2013/08/13/heart-rate-monitor-program-improves-heart-functioning-in-chronic-fatigue-syndrome-mecfs/</ref> Restorative strengthening and flexibility exercises were recommended as follows: * keeping the heart rate below the AT; * 3 times weekly; * exercises were done lying down<ref>http://www.cortjohnson.org/blog/2013/08/13/heart-rate-monitor-program-improves-heart-functioning-in-chronic-fatigue-syndrome-mecfs/</ref> At the one year follow-up, the patient showed 75% improvement in the time it took her to recover from the 2-day CPET itself. She also reported increased ability to complete daily activities.
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