Warm Up II: Performance Changes Following Active Warm Up and How to Structure the Warm Up
Key Results
Little scientific evidence supports warm-up effectiveness in many situations; practice has been built on athlete and coach trial-and-error. Earlier studies were poorly controlled, small, often without statistics, and mostly measured physiology rather than performance.
Short-term performance (<10 s): active warm-up gives slightly larger improvements than passive heating alone — but performance can be impaired if the warm-up is too intense or recovery too short, leaving high-energy phosphates depleted.
Intermediate (>10 s, <5 min) and long-term (≥5 min) performance: active warm-up improves both if the athlete starts the task relatively non-fatigued but with an elevated baseline VO2.
Endurance: active warm-up has been reported to improve endurance performance, but can be detrimental if it raises thermoregulatory strain significantly.
A brief, task-specific burst of activity adds further benefit for some tasks.
Many different combinations of intensity, duration and recovery can achieve similar physiological and performance changes.
Passive techniques (keeping warm) matter to maintain the temperature gain when there is an unavoidable delay before the task or the weather is cold.
The full text recommends, for intermediate and long tasks, a warm-up of roughly 5-10 min at about 40-60% VO2max with under 5 min of recovery before the task (full text; not checked against the abstract).
Mechanism
The trade-off the review builds on: arrive at the start with muscle temperature and baseline VO2 raised, but without the fatigue, phosphate depletion or thermal strain that a too-hard or too-long warm-up creates.
Practical Application
Bishop's 2003 review (Part II): active warm-up improves intermediate (>10 s to <5 min) and long (≥5 min) performance when the athlete begins non-fatigued but with baseline VO2 raised; for sprints under 10 s it beats passive heating slightly but backfires if too intense or too close to the start; for endurance it can hurt if it drives thermoregulatory strain; a brief task-specific burst adds benefit for some tasks — warm up enough to raise VO2, not so much that you arrive tired or hot.
Not from this paper; the base's own practice: for endurance events, 10-15 min progressive riding with 2-3 brief higher-intensity efforts, finishing 5-10 min before the start — the review supports the shape (elevated VO2, a task-specific burst, short recovery) but gives these numbers only in the full text or not at all.
Inference, not tested: for short/power events keep the warm-up specific and leave enough recovery to restore high-energy phosphates — the review's warning about too-intense, too-close warm-ups is aimed exactly at this case.
If the start is delayed or the weather is cold, keep warm passively (layers, heated garments) — the review names this as the role of passive techniques after an active warm-up.
Inference, not tested: in hot conditions, trim the warm-up — the review's caution about thermoregulatory strain is the reason; specific cuts are in REF-269.
Limitations
2003 narrative review — some recommendations updated by newer research
Limited dose-response data available at the time; the review itself notes the scarcity of well-controlled studies with large samples
Effects in different environmental conditions (heat, critical core temperature in endurance events) flagged by the author as needing research
How this entry was checked and changed
Why this level
regraded 2026-09-27 from A-: narrative review without systematic method, from the leading group on warm-up
Content correction 2026-09-27
Level A- -> B+: narrative review (rubric: authoritative narrative review from the leading group). Sport "cycling, sprint" -> general.
Key Results replaced with the abstract's conclusions (short-term <10 s, intermediate >10 s-<5 min, long ≥5 min; non-fatigued + elevated VO2; thermoregulatory-strain caveat; task-specific burst; passive maintenance). The intensity/duration guideline (40-60% VO2max, ~5-10 min) labelled full text; "5-15 min", "<2 min high-intensity priming", "static stretching impairs power" removed (not in the abstract; stretching is covered in REF-268).
Practical numbers (10-15 min at 60-70%, 2-3 efforts, 5-10 min recovery, >10 min delay) labelled "Not from this paper; the base's own practice"; lead now the review's own conclusions.