Any way you slice it, Force = Mass x Acceleration. In other words, an athlete's acceleration is proportional to the amount of force he/she can exert on a track surface (or starting block). By the most fundamental laws of physics, an athlete will increase their accleration by increasing their exerting force. The BEST and most well proven way to increase exerting force is the repetitive movement of increasing mass. The Sudden Impact Track primarily runs races that end in the word "Dash". Therefore powerful and explosive race phases are needed to remain competitive in such events.
Part of the Sudden Impact Track Club's training regimen is Strength Training. We have always had our own updated 'track specific' weight room to increase strength (and the use of the Impact Training facility is part of Club Membership). But only part of the track athletes' speed is produced in the weight room. The compliment of speed building happens via balance, flexibility, conditioning and technique. Without those four, the most efficient power delivery cannot be achieved. The Sudden Impact Track Club's entire training regimen has been designed to be complimentary and overlapping.
Though we have a strength training regimen for all athletes, not all athletes can take advantage of the S.I. Weight Room, therefore hill work, plyometric boxes, parachutes, track sleds, resistance bands et al., will round their experience. But our philosophy is '...if you can carry the weight of an average textbook...you can strength train with S.I.!...'