Fitness and nutrition blog
Source-led training, nutrition and habit guides to help you decide what to do and why.
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Blog
Training, nutrition and habit guides built on the sources we cite, so you can decide what to do and why.
Educational content based on the sources cited. It is not a substitute for medical or nutritional advice.
Training5 min
Will running wreck your knees? Here's what the data say
Recreational running isn't linked to more knee arthritis than staying on the couch. What three meta-analyses found and how to start without worry.
Read moreTraining4 min
Get up after you eat: your blood sugar will notice
Moving after a meal lowers your blood sugar spike, and a few squats by the table count too. What 2026 meta-analyses show and how to fit it in.
Read moreTraining6 min
Grip strength in both hands: what the gap may reveal
A meta-analysis of 900,253 people links one weaker hand to higher mortality. How to measure both hands and what to train, without obsessing.
Read moreTraining5 min
Does a workout on flu shot day boost the vaccine?
A meta-analysis pooled 22 reports on exercise and the flu shot: working out the same day didn't clearly boost antibodies. What to know on shot day.
Read moreTraining5 min
Does Pilates count as strength training?
Across 12 studies in women, Pilates improved flexibility and cut weight but didn't add lean mass. Here's what to add if you want to get stronger.
Read moreTraining4 min
Back pain? Weights eased it more than cardio in a trial
A trial in adults with chronic low back pain compared 8 weeks of strength training with cardio. Lifting cut pain and fear of movement more.
Read moreTraining5 min
Sore knees? What brings relief and what actually lasts
Across 29 trials, adding hands-on physical therapy to exercise eased knee arthritis pain more at first, but in the long run the extra wasn't significant.
Read moreTraining6 min
Your scale can't see your riskiest fat. Here's how to cut it
You can be a normal weight and still carry hidden fat around your organs. An analysis of 84 trials shows which exercise cuts it most, and it isn't lifting.
Read moreTraining5 min
Snoring, poor sleep: what eight weeks of lifting changed
In a trial of 25 people with sleep apnea, those who did strength training three times a week slept better. Daytime sleepiness stayed the same.
Read moreTraining4 min
Quitting your weight-loss shot? What keeps the weight off
Weight comes back faster after the drug than after a diet. One trial followed people for another year and found what slowed it down: exercise.
Read moreNutrition4 min
The trendy antiaging supplement, put to the test
Urolithin A is sold to help you age better. An independent trial gave it to middle-aged adults for a month, and their arteries didn't improve.
Read moreTraining5 min
High blood pressure? The exercise that lowers it all day
The wall sit lowers blood pressure most at the doctor's office. Across the whole day, the evidence favors cardio. Here's how to do both.
Read moreTraining5 min
Two sprints are enough: doing ten won't make you any fitter
A meta-analysis of 78 studies asked whether more sprints build more fitness. They don't: the weeks do. Here's the ten-minute session.
Read moreTraining4 min
Back pain? A workout video eased it as much as a live class
A trial in 94 people with chronic low back pain pitted live video classes against prerecorded ones. Pain dropped with both. Here's what it means.
Read moreTraining5 min
Lifting trains your brain too, just not all of it
Three meta-analyses tested what lifting does for your brain: control and speed, yes; memories of your life, unproven. And why cardio belongs in the mix.
Read moreTraining5 min
Short on time? Build the same muscle in fewer minutes
Three meta-analyses tested supersets, drop sets and other advanced methods: no extra muscle, but real time saved. Here's how to use them well.
Read moreTraining6 min
Heard about peptides? Here's what's actually known
What the peptides people talk about at the gym are, how they're used, what the FDA voted on and why most of what's known about injuries comes from animals.
Read moreTraining5 min
Exercise eases a low mood, a bit more in a group
Across 1,079 trials, exercise eased depression and anxiety. Here's the format that helped most, and why a little goes a long way for anxiety.
Read moreTraining5 min
How Much Biking Does Your Heart Actually Need?
Studies point to about 130 minutes of pedaling a week. Here is the pace that counts, and why the stationary bike gathering dust at home counts too.
Read moreTraining6 min
The scale won't budge while you train? You may be winning
114 trials show why you can lose fat and gain muscle while your weight stays put, and which mistake stalls the change.
Read moreTraining5 min
Stretching does not clear soreness. Here is what does
863 trials rank what actually eases next-day soreness. Stretching comes out badly, and ice has fine print worth reading.
Read moreTraining5 min
Stand up once an hour and your head notices the same day
Twenty-one trials measured what breaking up a long sit does to your thinking. The gain lands that same afternoon, and pushing hard is not what delivers it.
Read moreTraining5 min
It is not the steps. It is how fast you take them
Your watch counts the thing the studies do not track. The number they do track fits inside the walk you already take, with no extra time.
Read moreTraining5 min
You move all day at work. Your brain gets nothing out of it
The movement that protects your memory is not the movement you do on the clock. A review of 74 studies explains why, and what to do with your evenings.
Read moreTraining5 min
The weighted vest will not fix your bones. This will
They get sold as bone protection once you pass forty. A network of 34 trials says what actually makes bone stronger, and it is not what you carry.
Read moreTraining8 min
You do not need an hour to train. Two windows of five minutes are enough
A meta-analysis measured what happens when exercise lasts under five minutes and gets repeated a couple of times a day. The response from your heart and lungs is surprising, and the dropout rate even more so.
Read moreTraining8 min
Losing weight fast takes some of your muscle with it. Here is how to slow that down
When the weight comes off fast, roughly a quarter of what you lose is not fat. Here is what the studies actually say, the detail that calms the panic, and what to do to keep that share small.
Read moreTraining8 min
Your ID says one age. Your cells can say eight years less
Strength training is linked to aging almost eight years slower on the inside. Here is what that actually measures, what it still does not prove, and how to fit it into your week without changing your life.
Read moreNutrición7 min
¿Café antes de entrenar? La ciencia dice que sí (y no solo por la energía)
Un estudio con 2.264 personas asocia el café con más músculo y menos grasa. Otro con 355.000 suma protección para el hígado, y un tercero con 12.583 lo conecta con llegar más fuerte a los 70. Lo que dice tu taza diaria, con sus límites claros.
Read moreEntrenamiento15 min
Sincronizar el entrenamiento con tu ciclo: lo que dicen 78 estudios sobre entrenar antes, durante y después de la regla
El cycle syncing está en todas partes en redes. La mayor revisión, con 78 estudios, dice que el efecto es trivial. La lección real para mujeres en el gimnasio antes, durante y después de la regla.
Read moreEntrenamiento16 min
Entrenar para todo: lo que 36 estudios dicen sobre combinar cardio y pesas
¿Cardio, pesas o los dos? Cada vez más gente combina fuerza y resistencia. 36 estudios con 1.564 personas explican por qué esta tendencia tiene base real y cómo aprovecharla.
Read moreEntrenamiento16 min
Fuerza y cardio en la misma semana: la estructura que mejor funciona según la evidencia
Quieres fuerza y fondo pero no sabes cómo repartir la semana. Un estudio con 48 personas entrenadas y la evidencia sobre periodización por bloques te dan la respuesta.
Read moreEntrenamiento16 min
Ganar músculo sin machacarte: lo que dicen 30.000 personas y 137 revisiones científicas
La mayor actualización sobre entrenamiento de fuerza en 17 años confirma lo que muchos no quieren oír: la mayoría entrena más duro de lo necesario. Te contamos qué funciona de verdad.
Read moreNutrición16 min
Qué proteína comprar (y cuándo no necesitas ninguna)
40 botes en la estantería y ninguna pista de cuál elegir. 75 ensayos clínicos y 4.755 participantes comparan los tipos. Pero la primera pregunta es si realmente necesitas comprar uno.
Read moreNutrición16 min
Duermes mal y por eso comes peor: la conexión que nadie te explica
No es falta de voluntad. Dormir poco cambia las hormonas del hambre, sabotea tu cerebro y te empuja a comer peor. Te explicamos la conexión y qué puedes hacer esta semana.
Read moreNutrición16 min
Cuándo comer importa: lo que la ciencia del timing dice de verdad
Ventana anabólica, comer de noche, ayuno intermitente. Hay mucho mito y poca claridad. Qué dice la evidencia más reciente y qué ajustes prácticos puedes hacer esta semana.
Read moreNutrición17 min
Creatina: lo que 685 estudios dicen que necesitas saber
¿Funciona? ¿Es segura? ¿Cómo se toma? La evidencia de 685 ensayos clínicos responde a las preguntas más repetidas sobre creatina de forma clara.
Read moreEntrenamiento16 min
No sabes cuánto peso poner: así se elige de verdad
Llevas meses con el mismo peso y no progresas. No necesitas fórmulas ni test de fuerza máxima. Con estas señales simples sabes si tu peso es el correcto.
Read moreEntrenamiento16 min
La semana de descarga que tu cuerpo necesita y tu ego no quiere hacer
Llevas semanas entrenando duro y el progreso se ha frenado. No necesitas más intensidad. Necesitas una semana de descarga bien hecha. Así funciona y así se programa.
Read moreNutrición15 min
Omega-3: suplemento con base real o marketing con olor a pescado
Todo el mundo habla del omega-3 pero nadie te dice si realmente lo necesitas. Con los datos de la posición oficial de la ISSN 2025 y más de 200 estudios, aquí tienes la respuesta honesta.
Read moreTraining18 min
Menopause and strength training: what your body asks for from 45 onward
Menopause brings real changes in your body, but you are not forced to accept them as they come. Strength training is the simplest, most underrated tool to get there in good shape and go through it with energy.
Read moreTraining16 min
Strength training for women over 40: why lifting weights does not make you "bulky"
The fear of getting "bulky" stops many women before they even try. This post tries to lay out what tends to happen when a woman starts strength training with her head on straight.
Read moreNutrition15 min
How much protein you really need (and how to get there without tubs or strange powders)
Protein is question number one on the gym floor. The answer isn't complicated, doesn't need expensive shakes and can be solved with food you already have in your fridge.
Read moreNutrition15 min
Calcium, vitamin D and strong bones: what every woman over 45 should know
Reaching 60, 70 and 80 in good shape isn't about luck. It depends on how you look after your bones today. And that comes down to three things: food, smart sun exposure and strength training.
Read moreTraining15 min
Strength training for men over 40: getting back to the gym without injuring yourself
If you trained at 25 and have been off for years, coming back to the gym can go very well or very badly. A big part of the difference is decided in the first weeks.
Read moreNutrition15 min
Losing fat without rushing: why going slow is the fast way to keep it off
Almost everyone wants to lose fat fast. Almost everyone gains it back fast. The right pace isn't the one you like most. It is the one that stays.
Read moreTraining15 min
A 5-minute daily mobility routine for bodies that work seated
Eight hours sitting take their toll. Tight hips, loaded lower back, shoulders rolled forward. Five well-chosen minutes a day change the conversation.
Read moreTraining15 min
Sleep better to train better: the recovery piece almost no one looks after
If you train but sleep badly, you are asking your body to move forward with the handbrake on. Sleep is not an extra. It is training.
Read moreBeginners15 min
From the sofa to walking 5K: an 8-week plan to start moving again
If you have been doing nothing for a while, you don't need to walk into a gym tomorrow. You need to start with something your body still remembers: walking.
Read moreTraining15 min
Balance and aging well: why strength helps in your next decades
Falls are one of the big risks past a certain age. Strength is not vanity: it is one of the most practical tools to look after your long-term autonomy.
Read morePrincipiantes7 min
Tu primera semana en el gimnasio: qué hacer, cómo hacerlo y por qué no necesitas saber nada para empezar
La primera vez que entras en un gimnasio puede parecer intimidante. Máquinas que no conoces, gente que parece saber exactamente lo que hace. Esta guía es para ti.
Read moreMotivación7 min
Cómo crear el hábito del gym y que no dure solo dos semanas
La motivación te lleva el primer día, no el día 30 ni el día 60. Lo que te lleva esos días es un sistema. Aquí están los tres errores que lo rompen y los tres pasos que lo sostienen.
Read moreEntrenamiento7 min
Cómo calcular tu porcentaje de grasa corporal: la guía honesta para saber dónde estás de verdad
El peso en la báscula no te dice todo. Entender tu composición corporal es el primer paso real hacia un objetivo de entrenamiento con sentido.
Read moreNutrición6 min
Sin obsesionarte: 7 trucos de control de porciones que realmente funcionan
No necesitas una báscula de cocina ni una app para comer mejor. Estos 7 principios cambian tu relación con la comida sin convertir cada comida en un problema de matemáticas.
Read moreNutrición7 min
Qué comer cuando quieres perder grasa sin pasar hambre: guía práctica
El déficit calórico no tiene por qué significar hambre constante. La clave está en qué comes, no solo en cuánto.
Read moreNutrición6 min
Come esto y deja de tener hambre todo el rato
Hay alimentos que te sacian de verdad durante horas. Y hay otros que parecen comida pero que te dejan con más hambre a los 20 minutos. Aquí tienes los que de verdad funcionan.
Read moreNutrición6 min
Por qué no puedes parar de comer dulces (y cómo solucionarlo)
El antojo de dulce no es debilidad. Tu cuerpo te está mandando una señal. Cuando entiendes cuál es esa señal, es mucho más fácil responderle bien.
Read moreNutrición7 min
Deja de improvisar: prepara tu comida semanal en 1 hora
Si cada día cuando tienes hambre te preguntas qué vas a comer, ya has perdido la batalla. Preparar tu semana de comida el domingo en 1 hora cambia todo.
Read moreMotivación6 min
6 cambios que suenan tontos pero funcionan de verdad
No hace falta una transformación radical. Hay 6 hábitos tan sencillos que casi da vergüenza decirlos. Pero los que los hacen con consistencia notan la diferencia rápido.
Read moreNutrición7 min
Nutrición 2026: lo que vale la pena y lo que es puro hype
Cada año aparecen decenas de tendencias de nutrición nuevas. La mayoría son ruido de marketing. Aquí te decimos lo que de verdad funciona este año y lo que puedes ignorar directamente.
Read more