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The Relationship Between Relative Rest and Team Performance Across Competitive Seasons in the National Football
Anthony G Pinzone1, Yousuf Abu-Amara, Ryan W Gant
1Exercise Science and Exercise Physiology, Kent State University, Kent, Ohio.
Journal of Strength and Conditioning Research
|June 26, 2025
Summary
This study found no significant link between relative rest index (RRI) and National Football League (NFL) team performance. Win percentages and playoff success were not substantially affected by rest discrepancies between teams over many seasons.
Area of Science:
- Sports Science
- Exercise Physiology
- Performance Analytics
Background:
- Understanding factors influencing team performance is crucial in professional sports.
- The National Football League (NFL) involves rigorous scheduling, making player rest a key consideration.
- Relative Rest Index (RRI) quantifies rest discrepancies between competing teams.
Purpose of the Study:
- To investigate the relationship between RRI and team performance in the NFL.
- To analyze how varying rest intervals impact win percentage and playoff advancement.
- To assess this relationship across multiple NFL competitive seasons.
Main Methods:
- Analysis of 12,290 NFL regular season games from 1970-71 to 2022-23.
- Calculation of game-to-game rest intervals and the Relative Rest Index (RRI).
- Statistical analysis including Pearson correlations and ANOVAs to assess RRI's impact on win percentage and playoff depth.
Main Results:
- A trivial negative correlation was observed between RRI and win percentage.
- Win percentage did not significantly differ across various RRI categories.
- RRI was slightly lower in teams reaching the Super Bowl or divisional round compared to non-playoff teams.
Conclusions:
- Relative Rest Index (RRI) does not appear to significantly influence team performance in the NFL.
- Scheduling and rest disparities between teams show minimal impact on overall success.
- Further research may explore other performance-enhancing factors in professional football.
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