Long distance running and steady-state cardio can be detrimental to explosiveness and power, which are critical for sports like football or strength sports, due to adaptations at the muscular and neuromuscular levels that favor endurance over power output[1][2]. Meta-analyses and systematic reviews show that heavy strength or plyometric training is necessary to improve explosiveness, and excessive endurance training can hinder these adaptations[1][3].
Meta-Analysis Evidence
A 2024 systematic review and meta-analysis (PMID: 38165636) found that strength and plyometric training programs enhance running economy in endurance athletes, but did not enhance explosiveness or power when endurance training dominates the regimen[1]. Plyometric interventions, on the other hand, are proven to improve jump, sprint, and change-of-direction performance[4][5]. This supports the principle that high-volume, steady-state cardio does not promote adaptations required for explosive performance.
Physiological Differences
Endurance training, such as long-distance running, primarily develops slow-twitch (Type I) muscle fibers, which are efficient for prolonged, submaximal activity but generate less force and power[2][6]. In contrast, fast-twitch (Type II) fibers are responsible for bursts of speed, strength, and power, and are preferentially engaged and developed through high-intensity, explosive activity like sprinting, heavy lifting, and jumping[2][6][7].
Impact on Muscle Fiber and Athletic Performance
Prolonged endurance training can shift muscle fiber characteristics toward greater oxidative (endurance) capacity and sometimes diminish the proportion or cross-sectional area of fast-twitch fibers[6]. This compromises the ability to generate maximal force rapidly, which is especially detrimental for athletes whose sports require short, explosive efforts (e.g., football, Olympic lifting)[4][7].
Key Takeaways for Strength and Power Athletes
- Long distance and high-volume steady-state cardio emphasize physiological changes that hinder optimal development of speed and power[2][7][6].
- For football and strength sports, programming should prioritize resistance and explosive training over endurance-based cardio to maximize sports-specific muscle fiber adaptation and improve performance metrics like sprint speed, vertical jump, and agility[4][3][5].
- Meta-analyses (PMID: 38165636) confirm that only high-load, plyometric, or combined power-based training methods result in significant gains in explosive performance, not steady-state cardio[1][4].
References and Further Reading
- Meta-analysis on strength training for runners: PMID 38165636[1]
- Review on fiber type transitions: PMC8473039[6]
- Summary on fiber types and athletic adaptation: Nebraska Medicine[2], NASM[8], Outside Online[7].
In summary, athletes seeking explosiveness and power should minimize traditional long-distance cardio and focus on strength and plyometric protocols to optimize fast-twitch muscle fiber recruitment and preserve peak performance in sports demanding short, intense bursts of power[1][4][2][6][7].
Citations:
[1] Effect of Strength Training Programs in Middle- and Long-Distance … https://pubmed.ncbi.nlm.nih.gov/38165636/
[2] The difference between fast and slow twitch muscle fibers https://www.nebraskamed.com/health/healthy-lifestyle/orthopaedics/the-difference-between-fast-and-slow-twitch-muscle-fibers
[3] The Effect of Concurrent Plyometric Training Versus Submaximal … https://pmc.ncbi.nlm.nih.gov/articles/PMC5288420/
[4] Effects of plyometric training on jump, sprint, and change of direction … https://pmc.ncbi.nlm.nih.gov/articles/PMC12040276/
[5] Meta-analysis of the effect of plyometric training on the athletic … https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2024.1427291/full
[6] Muscle Fiber Type Transitions with Exercise Training: Shifting … https://pmc.ncbi.nlm.nih.gov/articles/PMC8473039/
[7] Scientists Say Muscle Fiber Type Should Determine How You Train https://www.outsideonline.com/health/training-performance/muscle-fiber-type/
[8] Fast-Twitch vs Slow-Twitch Muscle Fiber Types – NASM https://www.nasm.org/resource-center/blog/understanding-fast-twitch-vs-slow-twitch-muscle-fibers
[9] Effect of Strength Training Programs in Middle- and Long-Distance … https://pmc.ncbi.nlm.nih.gov/articles/PMC11052887/
[10] Skeletal muscle energy metabolism during exercise – Nature https://www.nature.com/articles/s42255-020-0251-4
[11] Exercise Scientist Explains Fast vs. Slow Twitch Muscle Fibers https://www.youtube.com/watch?v=J3DbTT1qSI4
[12] High-intensity interval training – Wikipedia https://en.wikipedia.org/wiki/High-intensity_interval_training
[13] Effects of range of motion on resistance training adaptations: A … https://onlinelibrary.wiley.com/doi/10.1111/sms.14006
[14] Fast-Twitch vs Slow-Twitch Muscles: Key Muscle Differences https://www.chicagoathleticclubs.com/blog/difference-between-fast-twitch-and-slow-twitch-muscles
[15] Muscle fiber typology substantially influences time to recover from … https://pubmed.ncbi.nlm.nih.gov/31999527/
[16] Is athletic performance determined by genetics? – MedlinePlus https://medlineplus.gov/genetics/understanding/traits/athleticperformance/
[17] ELI5 what’s the difference between fast and slow twitch muscles … https://www.reddit.com/r/explainlikeimfive/comments/1mo26dm/eli5_whats_the_difference_between_fast_and_slow/
