When American physiologist A. V. Hill laid the Nobel Prize-nominated foundation for understanding muscle heat and energy expenditure in 1920, the field of training was forever changed. Less known is the pioneering work of women like Barbara Drinkwater, who, decades later, advanced sports medicine knowledge regarding thermoregulation and performance in female athletes. Her research made it clear: temperature and preparation are not trivial matters but rather performance levers. Today, we know that a smart warm-up not only enhances performance but also significantly reduces injuries – a game changer for high performers in sports as well as in daily life.

Warming up means more than just "loosening up a bit." It increases the muscle temperaturethe warmth in the working muscle that improves enzyme activity and nerve conduction speed, enhances blood flowincreased blood flow delivers oxygen and nutrients faster, and optimizes neuromuscular activationa more precise interplay between nerves and muscles for faster, coordinated contractions. Dynamic movements that mimic the sport prepare movement patterns and activate those neural networks that ensure pace, precision, and stability. It is important to distinguish between static stretchingholding a stretch position without movement and dynamic stretchingcontrolled, large-range movements through the range of motion. The former can temporarily act as a brake before intense performances, whereas the latter is activating. Additionally, mental techniques like motor imageryvividly imagining movements in the mind sharpen attention, regulate the autonomic nervous system, and improve execution – an invisible turbo for focus and reaction speed.

A structured warm-up not only reduces the risk of injuries but also positively influences fatigue and flexibility. In youth football players, a standardized program led to fewer injuries over the annual cycle, lower subjective fatigue levels, and better flexibility – clear signals that systematic warming up makes the body and nervous system more resilient ^[1]. When the warm-up is also designed to be sport-specific and cognitively stimulating, executive functions and motor performance immediately increase – exactly the combination that characterizes high performers: physically ready and mentally sharp ^[2]. Psychophysiological components also play a role: short phases of mental visualization plus conscious breathing before exertion improve heart regulation and maintain strength and endurance performance, even during repeated efforts ^[3]. These effects translate into practical benefits: fewer missteps, more efficient movements, better quality of each repetition – providing a silent but continuous protection for joints, tendons, and muscles.

In an intervention study with adolescent football players, a structured warm-up including a cool-down reduced the incidence of injuries and decreased perceived fatigue while increasing flexibility. For practical application, this means: a planned, intensity-profiled warm-up has noticeable, season-wide effects – not just short-term “feel-good” moments ^[1]. Another study compared pure motor warm-ups with variants that integrated additional auditory or visual cognitive stimuli. Immediately after warming up, the groups with cognitive stimuli performed significantly better in decision-making and technique tests, suggesting that executive control and sport-specific precision can be trained even before the first sprint ^[2]. Additionally, research in operationally critical populations and martial arts shows that the combination of motor imagery and performance-activating stimuli improves acute muscle strength, reaction performance, and repeated sprint capability – without increased subjective fatigue. This makes mental components an efficient, low-risk part of modern warm-ups ^{[3] [4]}. Finally, the controversially discussed static stretching has been reassessed: when integrated short and moderately, the negative effect is minimal; however, longer hold times before strength and power tasks noticeably diminish performance. Therefore, dynamic sequences remain the gold standard before intense exertion ^{[5] [6]}.

- Start with 5-10 minutes of light aerobic exercise: brisk walking, easy cycling, or rowing, until you feel slightly warm and can breathe freely. Goal: high muscle temperature, "oiled" joints, cardiovascular activation ^[1].
- Incorporate dynamic, sport-specific patterns: lunges with rotation, hops/skips, change of direction, shadow drills of your sport. Integrate visual or verbal cues (e.g., color signal = change of direction) to couple neuromuscular and cognitive activation ^[2].
- Avoid long static stretching before intense sessions. If necessary, keep individual stretches short (≤60 seconds per muscle group) and with low intensity. Move longer stretching sessions to a separate mobility or cool-down window ^{[5] [6]}.
- Add 60-120 seconds of mental visualization at the end: close your eyes, take 3-5 calm breaths, then visualize 2-3 perfect repetitions of your key movement in your mind – pace, technique, timing. This increases sympathetic readiness without tiring you out ^{[3] [4]}.
- Optional performance boost: after the standard warm-up, perform short, technically sound activations (e.g., 2-3 explosive jumps or 1-2 sprints over 10-20 meters), then visualize once again for 30-60 seconds. This consolidates strength and focus without increasing overall load ^[4].

The next evolutionary stage of the warm-up combines temperature, technique, and mind: dynamic, sport-specific, cognitively stimulating. Future research will clarify how to optimally dose stimulus duration, mental sequences, and short activation blocks depending on sport, age, and training level – including wearable-supported biofeedback protocols that indicate the "sweet spot" in real time.