{"id":266314,"date":"2026-10-07T19:30:10","date_gmt":"2026-10-07T19:30:10","guid":{"rendered":"https:\/\/sports.runfyers.com\/index.php\/2026\/10\/07\/how-blood-donation-affects-runners-when-to-donate-and-what-to-avoid-athletics-news\/"},"modified":"2026-10-07T19:30:10","modified_gmt":"2026-10-07T19:30:10","slug":"how-blood-donation-affects-runners-when-to-donate-and-what-to-avoid-athletics-news","status":"publish","type":"post","link":"https:\/\/sports.runfyers.com\/index.php\/2026\/10\/07\/how-blood-donation-affects-runners-when-to-donate-and-what-to-avoid-athletics-news\/","title":{"rendered":"How Blood Donation Affects Runners: When to Donate and What to Avoid &#8211; Athletics News"},"content":{"rendered":"<p><\/p>\n<div>\n<p>Donating blood is a simple gesture that can save lives, and athletes should set an example. Ask yourself when was the last time you donated blood. If you meet the conditions to be a donor, there is no excuse not to contribute to one of the greatest acts of solidarity. You don\u2019t have to wait for someone close to you to need it.<\/p>\n<p>It\u2019s true that sometimes athletes hesitate to donate because we have doubts about how <strong>a donation could affect our athletic performance<\/strong>. We should be honest, and the short answer is yes, although the impact depends on several factors: the type of donation, the intensity of training, the sport we practice, and, above all, the timing in the season when we decide to donate.<\/p>\n<h6>Less blood, reduced oxygen transport capacity<\/h6>\n<p>For an athlete, the main effect of donating blood isn\u2019t so much the loss of blood volume as the temporary reduction in <strong>red blood cells and hemoglobin<\/strong>, the protein responsible for carrying oxygen from the lungs to the muscles.<\/p>\n<p>The plasma, which makes up a large portion of blood volume, recovers relatively quickly. However, the production of new red blood cells takes longer. Therefore, even though we may feel seemingly normal a few days after donating, our maximum capacity to transport oxygen can still be below the usual level.<\/p>\n<p>And this is especially relevant in endurance sports. Studies conducted with athletes and trained individuals have observed declines in VO\u2082max and in maximum exercise capacity after a whole blood donation. In a controlled study with moderately trained people, VO\u2082max was reduced by up to 10% and hemoglobin mass by about 7% during a four-week follow-up.<\/p>\n<p>Another study observed that, three days after donating, VO\u2082max had decreased by 6.5% and time-trial performance by 5.2%. In that work, performance had returned to baseline values approximately around 14 days, although some blood parameters, such as hemoglobin, took longer to recover.<\/p>\n<p>This does not mean that every athlete will lose 5 or 10% of performance. These results come from specific groups and individual responses can vary greatly. But they provide an important idea: <strong>donating blood can have a measurable effect on performance, especially when we need our maximum aerobic capacity.<\/strong><\/p>\n<h6>When is it most noticeable?<\/h6>\n<p>The first days are the most delicate. A review of several studies found reductions in hemoglobin, VO\u2082max, and maximum exercise capacity during the first 24-48 hours after a conventional donation. Therefore, <strong>the day of donation itself is not a good time to train hard<\/strong>, and logically one should avoid scheduling sets, high-intensity sessions, long runs, competitions, or particularly demanding workouts immediately afterward.<\/p>\n<p>Additionally, there is another factor that is sometimes overlooked: donation can temporarily affect cardiovascular and thermoregulatory responses. A study with cyclists exercising in warm conditions observed changes in heart rate and temperature regulation after donation. These acute effects disappeared roughly within two days.<\/p>\n<blockquote>\n<h4>The practical recommendation is simple: <strong>treat the donation day as a rest day and resume exercise gradually<\/strong>, especially if dizziness, weakness, or fatigue appear.<\/h4>\n<\/blockquote>\n<h6>So, what is the best time to donate?<\/h6>\n<p>If you train for health or recreationally, you probably don\u2019t need to complicate the calendar too much. But if you have specific athletic goals, it is worth planning. The worst option is to donate <strong>in the weeks preceding an important competition<\/strong>, especially if we are talking about a endurance event where small changes in performance can make a substantial difference.<\/p>\n<p>Marathon, half-marathon, road cycling, triathlon, trail running, cross-country skiing, or long-distance events are disciplines where the ability to transport oxygen is particularly important. In these cases, it makes sense to avoid donating close to the main target of the season.<\/p>\n<p>In these cases, it makes sense to avoid donating near the main objective of the season.<\/p>\n<p>Una estrategia razonable es colocar la donaci\u00f3n en un periodo de menor carga, por ejemplo, <strong>despu\u00e9s de una competici\u00f3n importante o durante una fase de transici\u00f3n o recuperaci\u00f3n<\/strong>, dejando despu\u00e9s suficiente margen antes del siguiente objetivo.<\/p>\n<p>No existe, sin embargo, un n\u00famero m\u00e1gico de d\u00edas v\u00e1lido para todo el mundo. Algunos estudios han encontrado una recuperaci\u00f3n del rendimiento alrededor de las dos semanas, mientras que otros han observado alteraciones en par\u00e1metros hematol\u00f3gicos durante varias semanas.<\/p>\n<p><strong>\u00bfCambia el efecto de la donaci\u00f3n seg\u00fan el tipo de deporte que practicamos?<\/strong><\/p>\n<p>S\u00ed. Y mucho. En deportes de <strong>resistencia<\/strong>, como correr, ciclismo, triatl\u00f3n, remo o nataci\u00f3n de larga distancia, la reducci\u00f3n temporal de la capacidad de transporte de ox\u00edgeno puede tener una mayor repercusi\u00f3n.<\/p>\n<p>En deportes predominantemente <strong>t\u00e9cnicos o de fuerza<\/strong>, el efecto sobre el rendimiento espec\u00edfico puede ser menor, aunque no significa que donar sangre sea irrelevante. La fatiga, la menor tolerancia al ejercicio intenso y la recuperaci\u00f3n del volumen sangu\u00edneo tambi\u00e9n pueden influir.<\/p>\n<p>En un entrenamiento de fuerza, por ejemplo, quiz\u00e1 la disminuci\u00f3n de VO\u2082max no sea el factor determinante de nuestro rendimiento, mientras que en una subida larga sobre la bicicleta s\u00ed puede resultar mucho m\u00e1s importante.<\/p>\n<p>Tambi\u00e9n hay que prestar atenci\u00f3n al hierro. La donaci\u00f3n de sangre supone una p\u00e9rdida de hierro y las reservas de ferritina pueden disminuir de forma considerable. En deportistas que ya parten de unas reservas bajas, las donaciones frecuentes pueden convertirse en un factor adicional a vigilar. En el estudio de donaciones repetidas, la ferritina lleg\u00f3 a reducirse alrededor de un 50% tras una donaci\u00f3n.<\/p>\n<p><strong>\u00bfDonar sangre significa dejar de entrenar?<\/strong><\/p>\n<p>No. Significa entrenar con cabeza. La donaci\u00f3n de sangre y el deporte no son incompatibles. De hecho, una persona f\u00edsicamente activa puede ser perfectamente donante si cumple los criterios establecidos. La cuesti\u00f3n est\u00e1 en <strong>elegir bien el momento y respetar la recuperaci\u00f3n posterior<\/strong>.<\/p>\n<p>Para un deportista recreativo, la estrategia puede ser tan sencilla como donar en un d\u00eda libre, descansar despu\u00e9s y volver progresivamente al entrenamiento. Para alguien que prepara una competici\u00f3n, lo m\u00e1s inteligente es evitar que la donaci\u00f3n coincida con las semanas cr\u00edticas de preparaci\u00f3n o con los d\u00edas inmediatamente anteriores a la competici\u00f3n.<\/p>\n<p>Y existe una diferencia importante entre <strong>donar sangre total y donar plasma<\/strong>. En la donaci\u00f3n de plasma se devuelve al donante la mayor parte de los gl\u00f3bulos rojos, por lo que el impacto sobre la hemoglobina es diferente. Precisamente por eso, algunos trabajos han se\u00f1alado la donaci\u00f3n de plasma como una alternativa potencialmente m\u00e1s compatible con las necesidades de los deportistas.<\/p>\n<p><strong>Las primeras 72 horas post-donar sangre paso a paso<\/strong><\/p>\n<p><strong>Las primeras horas:<\/strong><br \/>Despu\u00e9s de la donaci\u00f3n, lo prioritario es recuperar l\u00edquidos y evitar esfuerzos. Bebe con normalidad y sigue las indicaciones del centro de donaci\u00f3n. Ese d\u00eda, mejor <strong>nada de entrenamiento intenso, pesas exigentes ni actividades que impliquen un gran esfuerzo f\u00edsico<\/strong>. Si notas mareo, debilidad o malestar, descansa y no entrenes.<\/p>\n<p><strong>A las 24 horas:<\/strong><br \/>Si te encuentras bien, puedes retomar una actividad suave, como caminar, movilidad o un paseo en bicicleta muy tranquilo. La intensidad debe ser claramente inferior a la habitual. No es el momento de comprobar cu\u00e1nto has perdido de forma f\u00edsica: <strong>el objetivo es facilitar la recuperaci\u00f3n<\/strong>.<\/p>\n<p><strong>A las 48 horas:<\/strong><br \/>Si no hay s\u00edntomas y la recuperaci\u00f3n est\u00e1 siendo normal, puedes aumentar progresivamente la actividad. Un rodaje suave o una sesi\u00f3n de entrenamiento moderada puede ser razonable para muchos deportistas, pero conviene evitar todav\u00eda los esfuerzos m\u00e1ximos, las series muy intensas y las sesiones especialmente largas.<\/p>\n<p><strong>A las 72 horas:<\/strong><br \/>Para muchos deportistas recreativos, si se encuentran perfectamente, este puede ser un buen momento para volver gradualmente a su rutina habitual. Aun as\u00ed, la recuperaci\u00f3n de los gl\u00f3bulos rojos y de la capacidad de transporte de ox\u00edgeno contin\u00faa durante m\u00e1s tiempo, por lo que <strong>sentirse bien no significa necesariamente que el rendimiento haya vuelto al 100%<\/strong>.<\/p>\n<h5>The training traffic light<\/h5>\n<p>\ud83d\udfe2 <strong>Green:<\/strong> walking, mobility, and very light activity if you feel well.<\/p>\n<p>\ud83d\udfe1 <strong>Yellow:<\/strong> moderate training in the following days, gradually increasing the load.<\/p>\n<p>\ud83d\udd34 <strong>Red:<\/strong> competition, maximum intervals, HIIT, long runs, very demanding workouts, or sessions in hot conditions immediately after donation.<\/p>\n<\/div>\n<p><a href=\"https:\/\/www.athletics.co.ke\/how-blood-donation-affects-runners-when-to-donate-and-what-to-avoid\/\" target=\"_blank\" rel=\"noopener\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Donating blood is a simple gesture that can save lives, and athletes should set an example. Ask yourself when was the last time you donated blood. If you meet the conditions to be a donor, there is no excuse not to contribute to one of the greatest acts of solidarity. You don\u2019t have to wait [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":266315,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":"","footnotes":""},"categories":[6802],"tags":[],"class_list":{"0":"post-266314","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-athetics"},"_links":{"self":[{"href":"https:\/\/sports.runfyers.com\/index.php\/wp-json\/wp\/v2\/posts\/266314","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sports.runfyers.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sports.runfyers.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sports.runfyers.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sports.runfyers.com\/index.php\/wp-json\/wp\/v2\/comments?post=266314"}],"version-history":[{"count":0,"href":"https:\/\/sports.runfyers.com\/index.php\/wp-json\/wp\/v2\/posts\/266314\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sports.runfyers.com\/index.php\/wp-json\/wp\/v2\/media\/266315"}],"wp:attachment":[{"href":"https:\/\/sports.runfyers.com\/index.php\/wp-json\/wp\/v2\/media?parent=266314"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sports.runfyers.com\/index.php\/wp-json\/wp\/v2\/categories?post=266314"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sports.runfyers.com\/index.php\/wp-json\/wp\/v2\/tags?post=266314"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}