Los esprints cortos a máxima intensidad y el entrenamiento con saltos elevan la capacidad aeróbica y el manejo de la glucosa en sangre. Desarrollan una potencia rápida y explosiva —la capacidad de producir fuerza con rapidez— que el cardio constante y el levantamiento lento no consiguen. En los adultos mayores, esa potencia se relaciona estrechamente con si una persona puede subir escaleras o recuperarse de un tropiezo. Saltar carga el hueso a la altura de la cadera. El coste es que esprintar y saltar son esfuerzos de alta fuerza.
No son un punto de partida para el primer día. Requieren una base aeróbica y de fuerza, un calentamiento completo, y articulaciones y tendones preparados para la carga. Por sí solos, para la resistencia o la pérdida de grasa, no ahorran tiempo frente al trabajo constante. Reservados a una parte pequeña y bien afilada de una semana construida sobre movimiento más suave, están entre las cosas de mayor rendimiento que una persona puede añadir. Las versiones gratuitas no cuestan nada: esprints en cuesta, una bicicleta, saltos con el propio peso corporal.
Findings & Outcomes
What It Is
A sprint or a jump is a short, all-out effort to move fast or to produce force quickly. Think of a hill sprint, a bound, or a hard push lasting a few seconds to half a minute. Each effort repeats only after full recovery, so it stays explosive. A sprint runs at close to 100 percent effort; a resistance training set is slow and heavy, and a walking or zone-2 session is easy and long.
How It Works
Each sprint or jump makes a large, brief demand for force, produced all-out. It recruits the high-threshold fast-twitch motor units that easy, steady movement rarely calls on. It trains how fast a muscle produces force, separate from how much force it can produce. Like heavy lifting, it works as a hormetic stress: a controlled overload that triggers the body to build more capacity than it had. The aerobic and metabolic gains of all-out efforts belong to high-intensity intervals; see that page for the interval protocols. Speed, power, and bone are what a sprint adds beyond them.
Anatomy of the Practice
1The first sessions
The earliest change is neural. The nervous system begins firing motor units faster and in tighter sync. Within a few sessions you produce force more quickly, before any muscle has grown.
2The adaptation
Repeated high-force efforts signal the muscle and tendon to stiffen and to hold the size of the fast-twitch fibers. The impact of foot strikes and landings loads the skeleton, and the bone lays down mineral where the strain is greatest over the following months. All-out sprints also drain muscle glycogen fast and pull glucose in with little need for insulin, leaving the muscle more insulin-sensitive over the following day.
3Over months and years
Power and speed rise as long as the efforts stay hard, then hold at the new level while you maintain them. Without training, power declines and the fast-twitch fibers shrink first. In later life, much of the aim is holding on to the fast, forceful capacity you already have.
What Changed
For years, sprinting sat under conditioning for competitive athletes, and bone strength was treated as a matter of calcium and medication. Two findings moved both into everyday health advice. The first is that quick, forceful capacity responds to training at any age, young and old alike.
The second is that high-impact loading raises hip bone density; steady aerobic work like walking or cycling does not load bone enough to.
What the Evidence Shows
The findings differ in how firmly they are established, from most certain to least:
- The fitness and metabolic findings rest on many short trials, consistent but only weeks long.
- The power, jump, and bone findings are moderate, pooled from smaller studies.
- The link between quick, forceful movement and a longer life is the least direct. It rests on observational studies of aging. No trial has assigned people to sprint, so the link runs through general fitness and strength.
Two limits sit alongside. The bone gains are small, and appear only at the sites that are loaded. The edge of power training over conventional strength work is modest, measured as small gains in chair-rise and stair-climb time.
The Research & Studies
Everything here is based on the research we have collected and checked, sorted into groups and ordered with the strongest evidence first. Click any claim to open the studies behind it.
Cardiorespiratory Fitness
El entrenamiento de intervalos de esprint eleva el VO2 máx en aproximadamente un 8 %
Las sesiones cortas de esprint a máxima intensidad elevan la aptitud aeróbica, y lo hacen en mucho menos tiempo total del que necesita el cardio constante.
El entrenamiento de intervalos de esprint de bajo volumen elevó el VO2 máx en aproximadamente un 4 % a un 13 % (efecto ponderado g=0.63) en 13 estudios, y en aproximadamente 3.6 mL/kg/min, cerca de un 8 %, en un metaanálisis independiente de 16 ensayos aleatorizados. Measured in: Healthy sedentary or recreationally active adults, mostly young, across roughly 320 participants in the pooled trials. Las intervenciones duraron solo de 2 a 8 semanas, por lo que la durabilidad más allá de un par de meses no se ha probado, y los ensayos de origen se inclinan hacia poblaciones jóvenes, por lo que la magnitud del efecto en adultos mayores es menos segura.
Who this may not transfer to:The pooled trials are male-skewed and few report the sex split, and most participants were young adults, so the effect size in women and in older adults is less certain than in the young men studied.
The studies · 2
Sloth et al., effects of sprint interval training on VO2max and aerobic exercise performance, systematic review and meta-analysis · Scand J Med Sci Sports 2013;23(6):e341-52
Gist et al., sprint interval training effects on aerobic capacity, systematic review and meta-analysis · Sports Med 2014;44(2):269-79
Blood Sugar
Los intervalos de sprint redujeron la respuesta de insulina a una carga de glucosa en aproximadamente un 37 por ciento
Unos pocos esprints a máxima intensidad mejoran cómo maneja el cuerpo el azúcar en sangre, y lo hacen con muy poco ejercicio total, aunque esto se midió en hombres.
Doce semanas de entrenamiento en intervalos de sprint mejoraron la sensibilidad a la insulina casi tanto como el entrenamiento de resistencia tradicional, a pesar de un volumen de ejercicio cinco veces menor; por separado, dos semanas de sprints máximos en bicicleta que totalizaron 15 minutos de ejercicio redujeron la respuesta de insulina a una carga de glucosa en aproximadamente un 37 por ciento. Measured in: Sedentary and young healthy men (25 men in the randomized trial, 16 in the short intervention). Ambos estudios incluyeron solo a hombres, y el estudio de dos semanas tuvo un diseño de un solo grupo antes y después, sin grupo de control, por lo que la magnitud del efecto en mujeres y su durabilidad no están establecidas.
Who this may not transfer to:Both trials measured men only. Insulin sensitivity, body composition and the menstrual and hormonal cycle all differ by sex, so the size of the effect in women is not established.
The studies · 2
Gillen et al., twelve weeks of sprint interval training improves indices of cardiometabolic health similar to traditional endurance training despite a five-fold lower exercise volume · PLoS One 2016;11(4):e0154075
Babraj et al., extremely short duration high intensity interval training substantially improves insulin action in young healthy males · BMC Endocr Disord 2009;9:3
Muscle And Strength
El entrenamiento pliométrico aumenta la altura del salto en aproximadamente un 8.7 por ciento
El entrenamiento basado en saltos hace que salte más alto y produzca fuerza más rápido, una medida directa de la potencia explosiva.
El entrenamiento pliométrico mejoró la altura del salto con contramovimiento en aproximadamente un 8.7 por ciento, y la altura del salto en sentadilla y del salto en caída en aproximadamente un 4.7 por ciento cada uno, combinando datos de 26 estudios en personas sanas. Measured in: Healthy individuals across 26 controlled studies, including athletic and recreational participants. La altura del salto es una medida directa de la potencia explosiva, pero un indicador indirecto de la función cotidiana, y los estudios combinados varían mucho en la duración del programa y se inclinan hacia participantes más jóvenes y atléticos.
Who this may not transfer to:The pooled studies are male-skewed, few report the sex split, and participants skew young and athletic, so transfer to older or untrained women is not directly established.
The study · 1
Markovic, does plyometric training improve vertical jump height, a meta-analytical review · Br J Sports Med 2007;41(6):349-55
El entrenamiento de potencia supera ligeramente al levantamiento lento en la función de adultos mayores de 60 años
Para los adultos mayores, entrenar para moverse rápido bajo carga mejora la función cotidiana un poco más que el levantamiento de pesas lento y pesado.
El entrenamiento de potencia con alta velocidad de movimiento superó ligeramente al entrenamiento de resistencia convencional de velocidad lenta en la función física de adultos mayores de 60 años que vivían en la comunidad (tamaño del efecto combinado de 0.32 a favor del entrenamiento de potencia), y mejoró la función en adultos frágiles y con enfermedades crónicas en un metaanálisis posterior. Measured in: Community-dwelling adults over 60 (377 people across 11 trials) and adults with frailty or chronic disease. La ventaja sobre el entrenamiento de fuerza convencional es modesta, y algunos resultados de función combinados tuvieron intervalos de confianza que cruzaban el cero, por lo que la ventaja es pequeña.
Who this may not transfer to:The pooled trials included both sexes, so the finding transfers across sex within the over-60 population studied.
The studies · 2
Tschopp, Sattelmayer and Hilfiker, is power training or conventional resistance training better for function in elderly persons, a meta-analysis · Age Ageing 2011;40(5):549-56
Sklivas et al., efficacy of power training to improve physical function in individuals diagnosed with frailty and chronic disease, a meta-analysis · Physiol Rep 2022;10(11):e15339
La potencia muscular se desvanece más rápido que la fuerza con la edad, aproximadamente un 8.5 por ciento en tres años
A medida que envejecemos, la capacidad de moverse con rapidez y fuerza se desvanece antes y más rápido que la fuerza bruta, y es esa fuerza rápida la que más afecta a la vida diaria.
La potencia muscular disminuye antes y más rápido que la fuerza máxima con la edad, y se relaciona más estrechamente con la función física, la discapacidad y las caídas que la fuerza. Un estudio longitudinal de tres años midió pérdidas de potencia de piernas de aproximadamente un 8.5 a un 8.8 por ciento en adultos mayores sanos y con movilidad limitada. Measured in: Older adults, synthesized across longitudinal and cross-sectional studies. Las tasas exactas varían según la cohorte, el método de medición y cómo se define la potencia, por lo que la cifra ampliamente citada de que la potencia cae aproximadamente el doble de rápido que la fuerza es una estimación central, no una constante fija.
Who this may not transfer to:The longitudinal cohort included both men and women (24 of 48 female), so the pattern is established in both sexes.
The studies · 2
Reid and Fielding, skeletal muscle power, a critical determinant of physical functioning in older adults · Exerc Sport Sci Rev 2012;40(1):4-12
Reid et al., longitudinal decline of lower extremity muscle power in healthy and mobility-limited older adults · Eur J Appl Physiol 2014;114(1):29-39
Los velocistas de toda la vida siguen perdiendo tamaño de fibras de contracción rápida con la edad, aunque la calidad de las fibras se mantiene
Incluso los velocistas de toda la vida pierden algo de tamaño de las fibras de contracción rápida al envejecer, aunque la calidad de las fibras que quedan se mantiene bien.
En velocistas masculinos de entre 18 y 84 años, el área transversal de las fibras de contracción rápida (tipo II) era menor en los atletas mayores, mientras que el área de las fibras de contracción lenta (tipo I) no cambió, y la fuerza máxima del músculo completo y la tasa de desarrollo de fuerza disminuyeron con la edad. La calidad intrínseca de las fibras individuales, su tensión específica, se conservó en gran medida. Measured in: 91 male sprint athletes aged 18 to 84, with single-fiber analysis in a younger and an older subset. What could explain it instead: Self-selection and survivor effects: lifelong sprint athletes differ from the general population in genetics, health and training history, and a cross-sectional design cannot separate aging from those differences or from who keeps competing into old age.. Se trata de una comparación transversal, no de un ensayo, por lo que muestra que el entrenamiento de sprint de toda la vida no previene por completo la reducción de las fibras de contracción rápida con la edad; no demuestra qué aporta el sprint en comparación con no entrenar.
Who this may not transfer to:Measured entirely in male sprinters. Fiber-type distribution and the trajectory of age-related muscle loss differ by sex, so the picture in women is not established here.
The study · 1
Korhonen et al., aging, muscle fiber type, and contractile function in sprint-trained athletes · J Appl Physiol 2006;101(3):906-17
Bone Density
El entrenamiento de salto aumenta la densidad ósea en la cadera en aproximadamente un 1.5 por ciento
Saltar carga el hueso donde aterriza la fuerza y aumenta la densidad ósea en ese lugar, de forma más fiable en la cadera, aunque las ganancias son pequeñas.
El entrenamiento de salto aumentó la densidad mineral ósea del cuello femoral en aproximadamente un 1.5 por ciento frente a controles que no saltaron, en 18 ensayos; un metaanálisis independiente encontró que saltar aumentó la densidad del cuello femoral y del trocánter en mujeres premenopáusicas, sin ganancia significativa en la columna lumbar. Measured in: Adult men and women over 18 (666 participants in the site-specific analysis); the second analysis was premenopausal women only. Las ganancias son pequeñas y específicas de los sitios esqueléticos que realmente se cargan, los protocolos varían mucho, y los efectos en la columna fueron menos consistentes que en la cadera.
Who this may not transfer to:The site-specific analysis pooled men and women; the second analysis was premenopausal women only, so the effect in postmenopausal women, where bone loss is fastest, is less directly established.
The studies · 2
Florence, Oosthuyse and Bosch, skeletal site-specific effects of jump training on bone mineral density in adults, systematic review and meta-analysis · J Sports Sci 2023;41(23):2063-2076
Zhao, Zhao and Zhang, efficiency of jumping exercise in improving bone mineral density among premenopausal women, a meta-analysis · Sports Med 2014;44(10):1393-402
Progress Markers
Los músculos más fuertes predicen menores tasas de mortalidad en dos millones de adultos
Las personas con músculos más fuertes tienden a vivir más tiempo, aunque esto mide la fuerza como un indicador de todo el sistema productor de fuerza, no del sprint en sí.
Una mayor fuerza muscular se asoció con una menor mortalidad por todas las causas en cohortes prospectivas que combinaron datos de aproximadamente dos millones de hombres y mujeres. Measured in: Approximately two million apparently healthy men and women across the pooled cohorts. What could explain it instead: People with higher muscular strength differ from weaker people in overall health, activity and underlying illness at once, and observational designs cannot separate the strength from the person who has it.. Esto mide la fuerza, habitualmente la fuerza de agarre, como indicador del sistema productor de fuerza, no la potencia ni el sprint en concreto, y los estudios subyacentes son observacionales, por lo que no se puede descartar el sesgo del cumplidor sano ni la causalidad inversa.
Who this may not transfer to:The pooled cohorts included both men and women, and the review examined sex-specific effects, so the association holds across sex.
The study · 1
Garcia-Hermoso et al., muscular strength as a predictor of all-cause mortality in an apparently healthy population, systematic review and meta-analysis of about two million men and women · Arch Phys Med Rehabil 2018;99(10):2100-2113
How To Do It
These are maximal efforts, so readiness comes before intensity. The fast-twitch units and tendons that handle an all-out effort must be conditioned before the first one. A base and a full warm up come first, and the intensity climbs gradually across weeks.
Ways to Do It
Two preparations come before the hard efforts: an aerobic and strength base underneath them, and tissue ready for high force. Warm up thoroughly, keep the volume low and the quality high, and progress over weeks. If you are older, unwell, or new to this, build the base first.
Before any all-out work, spend a few weeks on easy aerobic movement and basic strength. Add gentle speed prep: skips, easy bounding, and strides that build from a jog to a fast run, never a full sprint. This readies tendons and joints for force, and comes before any sprinting or jumping.
Short all-out efforts uphill, starting at six to eight seconds and building toward ten to twenty, with a full walk-back recovery between them so each one stays fast. A hill limits your top speed and softens the landing, gentler on the hamstrings and joints than flat-out sprinting on the level. A bike or a rower gives the same all-out stimulus with no impact at all.
Low pogo hops, broad jumps, and step-downs from a low box, landing soft and quiet through the whole foot. Start with low height and low volume, a handful of quality reps with full rest between sets, and add height and reps slowly. This is the impact that loads bone, and where too much too soon causes trouble.
A few all-out efforts of twenty to thirty seconds, with a couple of minutes of easy movement between. Run these on a stationary bike or a rower, where a full all-out effort stays safe. This is the sprint-interval dose studied for fitness and blood sugar.
Go Deeper
- VO2max Training: the aerobic capacity that sprint intervals raise fastest, why it predicts a long life, and how to measure it.
- High-Intensity Intervals: the interval and metabolic side of hard efforts in full, including the sprint and REHIT protocols and where they roughly match steady cardio.
- Resistance Training: the slow heavy load that builds maximal strength, the base that fast, forceful work sits on top of.
- Walking: the easy steady aerobic base underneath all of it, free and the most-measured aerobic habit there is.
- Osteoporosis: the bone-loss condition the impact of sprinting and jumping works against, and how to load fragile bone safely.
Cautions
Cautions For This Practice
Everything to be aware of is here, in one place. This practice suits most healthy people; a few situations call for real care.
El esfuerzo vigoroso aumenta brevemente el riesgo de muerte cardíaca súbita, aproximadamente una por cada 1.5 millones de episodios
El riesgo de muerte cardíaca súbita fue transitoriamente mayor durante y poco después de un esfuerzo vigoroso, pero el riesgo absoluto de cualquier episodio individual era muy bajo, aproximadamente una muerte súbita por cada 1.5 millones de episodios de esfuerzo vigoroso, y el aumento transitorio fue mucho menor en los hombres que ejercitaban habitualmente. La elevación durante un esfuerzo intenso es medible, pero el riesgo absoluto por episodio es minúsculo, y el entrenamiento regular lo reduce aún más, por lo que esta es una razón para construir una base y progresar, no para evitar la intensidad.Albert et al., triggering of sudden death from cardiac causes by vigorous exertion
Warm up and prepare before you go all out
Sprinting and jumping put high force through muscle, tendon and joint in an instant, and a cold, sudden maximal effort is where hamstring strains and tendon injuries happen. Warm up thoroughly. Start well short of a full sprint and build into it across the session. Spend weeks on strides, easy bounding, and low jumps before your first true all-out effort. Add intensity and volume gradually across weeks.
Get cleared first if your heart is a question
An all-out effort drives the heart rate near its maximum. Get a check first if you have known heart disease, an uncontrolled arrhythmia, uncontrolled high blood pressure, or severe valve disease. Also get checked for warning symptoms: chest pain or tightness on exertion, unusual breathlessness, palpitations, or fainting or near-fainting when you exert yourself. None of these is an automatic no. The brief rise in cardiac risk during a hard effort falls mainly on an unconditioned person's occasional all-out push. It is much smaller in people who train regularly. For most, the path is to get assessed, build a base, and progress under guidance.
Choose low-impact if your joints or bones need it
The impact that loads bone also loads joints and tendons. Existing tendinopathy, arthritis, a recent injury, a higher body weight, or pregnancy are all reasons to take the all-out stimulus without impact, on a bike or rower. Fragile bone is a particular case. Someone with osteoporosis and a fracture risk should add impact and any loaded spinal movement gradually and only with guidance.
Keep the volume low and let recovery do its work
The gains from sprinting and jumping come from quality. The common mistake is doing too many reps too soon while fatigued, the point where form falls apart and injuries cluster. Keep the number of hard efforts small, take full recovery between efforts, and leave at least a day between hard sessions. Pain in a tendon or joint that builds across sessions means back off and rest it.
Start slow, be smart, read the research, and consult a professional if you have any concerns. This is here to inform your choice, not make it for you.
Common Questions
Does This Matter More as I Age?
Yes, and more than most people expect. Power declines faster than strength as the years pass, by roughly two to one. So the sensible move later in life is to start gentle: low jumps and controlled fast movements, well before anything like a maximal sprint. Kept in the routine, that fast, forceful work is one of the few levers on staying steady on your feet.
Do Sprints Really Change Fitness and Blood Sugar That Fast?
Yes, out of proportion to the minutes involved. Pooled across trials, low-volume sprint-interval training raised VO2max by about 8 percent. In another study, two weeks of a few all-out cycle sprints sharply improved insulin action in young men. The catch is that the effort has to be maximal, so a bike or a rower suits the short-sprint version best. For fat loss alone it is no faster than steady work, and the strongest metabolic results so far come mostly from studies in men.
How Is It Different From Lifting or Steady Cardio?
They train different capacities and belong together. Slow, heavy resistance training builds how much force you can make. Easy, steady work like walking or zone-2 cardio builds how long you can keep going. Sprinting and jumping build how fast you can produce force. In a week the hard, fast work is the small, sharp layer on top, with most movement easy and only a few maximal efforts on that base.
Explore Related
Other pages this one connects to, by the evidence they share, the outcomes they touch, and the ground they cover.
All 14 sources on this page independently checked and cross-referenced.
Thomas Dehli, Founder & Editor, Sacred Lotus
Sacred Lotus has published Chinese medicine reference material since 2001. Integrative pages are held to the same standard as the herb and formula library: cite the source, grade the claim at its real strength, and say where the research has not looked. This page is educational and it is not medical advice. Last reviewed and updated August 9, 2026.
Evidence strength
How confidently the research supports a claim. Strength describes the evidence, not our endorsement.