The aim of this study is to explore the relationships between internal and external load measures in American football. Thirty football players wore a portable integrated monitor unit for 10 weeks during the fall football season. Relationships between internal and external load measurements were determined. Internal load consisted of heart rate zones and heart rate-derived measures and session Ratings of Perceived Exertion (sRPE). External load consisted of distance in different speed zones, total distance traveled, and accelerations. There were many significant positive relationships, but the meaningful relationships (r > 0.5) were between heart rate-derived measures of load (Training Impulse and heart rate reserve) and low-intensity movement and total distance. Only accelerations between 1 and 1.99 m·s⁻² were moderately correlated to heart rate-derived internal load. RPE values alone did not correlate strong enough with any of the measure but sRPE training load (sRPE-TL) correlated to most external values. Overall, moderate correlations were present between heart rate-derived internal load to total distance and lower intensity movement. sRPE-TL values had high correlations but were highly dependent on duration, not perceived exertion. When addressing load in American football, duration of the session is a key component in determining internal load as HR data and sRPE alone do not correlate highly with external loads.

中文翻译：

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第一节大学足球实践的内外部负荷量度之间的关系

这项研究的目的是探讨美式足球内部和外部负荷测量之间的关系。在秋季足球赛季中，有30名足球运动员穿着便携式集成监控器10周。确定了内部和外部负载测量之间的关系。内部负荷包括心率区和源自心率的测量值以及感知运动强度（sRPE）的会话等级。外部负载包括不同速度区域中的距离，行驶的总距离和加速度。有许多显着的正相关关系，但有意义的关系（r > 0.5）在心率派生的负荷量（训练冲动和心率储备）与低强度运动和总距离之间。仅在1至1.99 m·s之间的加速度⁻²与源自心率的内部负荷适度相关。单独的RPE值与任何一项措施都没有足够强的相关性，但是sRPE训练负荷（sRPE-TL）与大多数外部值相关。总体而言，心率派生的内部负荷与总距离和较低强度的运动之间存在中等相关性。sRPE-TL值具有较高的相关性，但高度取决于持续时间，而不是劳累力。在解决美式橄榄球的负荷时，会议时间是确定内部负荷的关键因素，因为HR数据和sRPE本身与外部负荷并没有高度关联。