Why a warm-up matters beyond just 'feeling ready'
Raises core and muscle temperature, improves joint mobility, and primes the nervous system for the specific movement patterns about to be performed — genuinely reducing injury risk and often improving actual performance.
Dynamic movement over static stretching beforehand
Leg swings, bodyweight squats, arm circles, and light cardio prepare the body more effectively for exercise than long static stretches, which can temporarily reduce power output if held too long right before intense activity.
Movement-specific preparation
Beyond general warming up, doing a few lighter-weight or bodyweight repetitions of the specific exercise about to be performed heavily primes the exact muscles and movement pattern involved far more effectively than generic cardio alone.
A reasonable time investment
5-10 minutes of dynamic movement, plus a couple of progressively heavier warm-up sets for strength training specifically, is typically sufficient without turning warm-up into an unnecessarily long separate workout.