Effects of Position and Injury Status on Associations Between Preseason Workload and Heart-Rate Variability Profiles in American College Football Players.

IF 3.5 2区 医学 Q1 PHYSIOLOGY
Andrew A Flatt, Jeff R Allen, Clay M Keith, Michael R Esco
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引用次数: 0

Abstract

Purpose: To quantify position-specific associations between heart-rate-variability profile characteristics and external-workload parameters in American college football players during preseason camp while accounting for injury-related participation status.

Methods: Twenty-seven players categorized into skill (n = 15) and midskill (n = 12) position groups participated in the study. Players were further categorized as having "full go" (n = 15) or "go as can" (n = 12) participation status. The camp mean and coefficient of variation (CV) (indexing daily variation) for various workload parameters and resting heart rate and the natural log of the root mean square of successive differences (LnRMSSD) were quantified.

Results: Skill players who consistently performed higher total workloads (total distance and player load) exhibited the most stable LnRMSSD (ie, lower CV; P < .05), while midskill players with the highest total workloads exhibited greater daily variation in LnRMSSD (ie, higher CV; P < .05). These associations persisted after injury-status adjustment. However, consistent between position groups, players with greater daily variation in select workload parameters also showed greater daily variation in LnRMSSD (P < .05). No between-groups differences for injury status were observed (P > .05), although effect-size analysis showed that LnRMSSD was moderately greater in "full go" players (effect size = 0.73, P < .07).

Conclusions: Daily LnRMSSD variation better reflected position-specific workload responses, whereas mean LnRMSSD may affect or be affected by injury status. While skill players tolerated high total workloads with stable LnRMSSD, midskill players exhibited less day-to-day variation in LnRMSSD and high-intensity outputs at moderate workloads.

美国大学橄榄球运动员季前赛负荷与心率变异性之间的关系:体位和受伤状况的影响。
目的:量化美国大学橄榄球运动员在季前赛期间心率变异性特征和外部工作量参数之间的位置特异性关联,同时考虑与受伤相关的参与状态。方法:将27名球员分为技巧组(n = 15)和中技巧组(n = 12)进行研究。玩家被进一步分类为“全力以赴”(n = 15)或“尽其所能”(n = 12)的参与状态。量化各负荷参数和静息心率的camp平均值和变异系数(CV)(指标日变化)以及连续差异均方根的自然对数(LnRMSSD)。结果:总工作负荷(总距离和球员负荷)较高的技能型球员表现出最稳定的LnRMSSD(即较低的CV;P < 0.05),而总工作量最高的中技能球员在LnRMSSD上表现出更大的日变化(即更高的CV;P < 0.05)。这些关联在损伤状态调整后仍然存在。然而,与位置组之间一致的是,在选择的工作负荷参数上每日变化较大的球员在LnRMSSD上的每日变化也较大(P < 0.05)。尽管效应量分析显示,“全速围棋”选手的LnRMSSD中度较高(效应量= 0.73,P < .07),但两组之间的损伤状态没有差异(P < 0.05)。结论:每日LnRMSSD变化更好地反映了特定位置的工作量反应,而平均LnRMSSD可能影响或受损伤状态的影响。虽然熟练选手在稳定的LnRMSSD下可以忍受高总工作量,但中等技能选手在中等工作量下表现出较少的LnRMSSD日常变化和高强度输出。
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来源期刊
CiteScore
5.80
自引率
12.10%
发文量
199
审稿时长
6-12 weeks
期刊介绍: The International Journal of Sports Physiology and Performance (IJSPP) focuses on sport physiology and performance and is dedicated to advancing the knowledge of sport and exercise physiologists, sport-performance researchers, and other sport scientists. The journal publishes authoritative peer-reviewed research in sport physiology and related disciplines, with an emphasis on work having direct practical applications in enhancing sport performance in sport physiology and related disciplines. IJSPP publishes 10 issues per year: January, February, March, April, May, July, August, September, October, and November.
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