Sprint Bound Index Test. This article discuss on procedure for conducting sprint bound index (SBI). The purpose of this test is to assess the development of the athlete's elastic leg strength. To conduct the test, you can read the instruction below.
Required tools
To conducting this test you will require:
• 400 meter track – 30 meter marked section on the straight
• Cones or marker
• Stop watch
• Two assistants.
How to do the test
• Begin with one foot on the start line and place the other foot 2 to 3 feet behind you
• Place both of your helpers at the finish line – one to count the number of foot contacts and the other to time your sprint-bound effort over the 30m distance
• On your own command, sprint-bound down the track for the entire 30m distance
• The timer should start the watch when the foot on the start line breaks contact with the ground and then stop the watch when your torso crosses the finish line
• The time is recorded by rounding up to the nearest tenth of a second
• Your second helper is responsible for counting the number of bounds it takes you to reach the finish line
• The number of bounds should be rounded down to the nearest half-bound
• Perform three trials, with 3 to 5 minutes between each trial
• Record the results of all three trials.
Analysis
Calculate the 'sprint-bounding index' for each trial using the following formula:
• Sprint-bound index (SBI) = (no. of bounds) x (time for 30m)
Example:
You have taken 15.5 bounds to cover the 30m, in a time of 4.5 seconds.
• SBI = 15.5 x 4.5 = 69.75.
Required tools
To conducting this test you will require:
• 400 meter track – 30 meter marked section on the straight
• Cones or marker
• Stop watch
• Two assistants.
• Begin with one foot on the start line and place the other foot 2 to 3 feet behind you
• Place both of your helpers at the finish line – one to count the number of foot contacts and the other to time your sprint-bound effort over the 30m distance
• On your own command, sprint-bound down the track for the entire 30m distance
• The timer should start the watch when the foot on the start line breaks contact with the ground and then stop the watch when your torso crosses the finish line
• The time is recorded by rounding up to the nearest tenth of a second
• Your second helper is responsible for counting the number of bounds it takes you to reach the finish line
• The number of bounds should be rounded down to the nearest half-bound
• Perform three trials, with 3 to 5 minutes between each trial
• Record the results of all three trials.
Analysis
Calculate the 'sprint-bounding index' for each trial using the following formula:
• Sprint-bound index (SBI) = (no. of bounds) x (time for 30m)
Example:
You have taken 15.5 bounds to cover the 30m, in a time of 4.5 seconds.
• SBI = 15.5 x 4.5 = 69.75.
Analysis of the result is by comparing it with the results of previous tests. It is expected that, with appropriate training between each test, the analysis would indicate an improvement. A reduction in the Sprint-bound index indicates an improvement.
Target group
This test is suitable for active individuals but not for those where the test would be contraindicated.
Reliability
Reliability would depend upon how strict the test is conducted and the individual's level of motivation to perform the test.
Validity
There are no published tables to relate results to potential performance in competition.
Target group
This test is suitable for active individuals but not for those where the test would be contraindicated.
Reliability
Reliability would depend upon how strict the test is conducted and the individual's level of motivation to perform the test.
Validity
There are no published tables to relate results to potential performance in competition.