Effects of Resistance Sprint Training With and Without Power Training on Sprint and Agility Performance

Primary outcomes

1. Resisted sprinting speeds at 10-30 m

   Time frame: Change from Baseline at 6 weeks

   The athlete sprints a distance of 10-30m while pushing or pulling against resistance. This resistance can be provided by various means, such as sled, resistance band, or a partner holding onto a harness worn by athlete. A study suggested that the magnitude of the correlation coefficient between speed-test results and match parameters was considered as small (0.1 ≤ r < 0.3), moderate (0.3 ≤ r < 0.5), large (0.5 ≤ r < 0.7), very large (0.7 ≤ r < 0.9), and nearly perfect (r ≥ 0.9)

2. Change of direction speed (COD) testing

   Time frame: Change from Baseline at 6 weeks

   This test consists of four 5-m sections marked with cones set at 100° angles. Three maximal attempts were performed with a 5-min rest interval between attempts. Starting from a standing position with the front foot placed 0.3 m behind the first pair of photocells i.e., starting line athletes ran and changed direction as quickly as possible until crossing the second pair of photocells placed 20 m from the starting line .A study suggests a near perfect correlation between the COD (r=0.92)

3. Squat jumps (SJ)

   Time frame: Change from Baseline at 6 weeks

   In the SJ, a static position with a 90° knee flexion angle was maintained for 2 seconds before every jump attempt. No preparatory movement was allowed and an experienced researcher visually inspected for proper technique. A study suggested that jumping tests had high correlation coefficients with the principal component (r = 0.76-0.87.

4. Countermovement Jump (CMJ)

   Time frame: Change from Baseline at 6 weeks

   In the CMJ, athletes were instructed to perform a downward movement followed by a complete extension of the lower limbs and were allowed to freely determine the amplitude of the countermovement to avoid changes in their jumping coordination pattern. Participants were instructed to assume the same body position at takeoff and landing on both squat and counter movement jumps) the CMJ tests had a high correlation coefficient with the principal component (r=0.76-0.87)

5. Horizontal Jump (HJ)

   Time frame: Change from Baseline at 6 weeks

   The athlete stands behind a line marked on the ground with feet slightly apart. A two-foot take-off and landing is used, with swinging of the arms and bending of the knees to provide forward drive. The subject attempts to jump as far as possible, landing on both feet without falling backwards. Three attempts are allowed a study suggested a Horizontal jump assessment(r=-0.7-0.86)