When most parents think about athletic performance, they usually think about:0 Strength Speed Vertical jump Size But one of the biggest indicators of explosiveness is something many athletes have never heard of: RSI. RSI stands for Reactive Strength Index, and it plays a major role in how explosive, fast, and efficient an athlete is during competition. At JJR Next Level, reactive strength is one of the biggest things we focus on when developing athletes because sports are not just about...

A lot of athletes think summer football training just means running routes, lifting a little, and showing up to camp. But the athletes who make the biggest jumps between seasons usually attack the summer differently. Summer is one of the biggest development windows football players get all year. During the season, the focus is usually on staying healthy, recovering, and maintaining performance. In the summer, athletes finally have the opportunity to truly improve physically. This is where...

Every parent wants their athlete to train hard, get faster, and stay healthy. What most don’t realize is that training without a proper performance assessment can actually increase injury risk—even when the athlete looks strong and athletic on the surface.