On Blackboard there are four graphs which you will have to analyze. The graphs are of a countermovement jump in which the athlete used an arm swing and a concentric only jump in which the hands remained on the hips.

Use the graphs to complete the data table and compute vertical jump height using the time of flight and impulse-momentum equations

Athlete 1 - CM Athlete 1 - Athlete 2 - CM Athlete 2 Measurement Concentric Concentric with Arms with Arms Only Only ~.54 seconds ~.50 seconds ~.57 seconds ~.46 seconds Time of flight (s) ~ 1,750 N ~ 1,770 N ~2,020 N -2,000 N Peak Force Positive Impulse Before Take-off (Ns) Negative Impulse Before Take-off (Ns) Net Impulse Before Take-off Ns) ~ 0.36 ~ 0.31 ~ 0.40 ~0.26 Jump height from TOF (m) Jump height from Impulse (m) Discussion Question (10 points) 1) Based on shape of the GRF vs time graphs make training recommendations for each athlete to improve VJ performance. Athlete 1 (CM w/ arms): Athlete 1 (Concentric): Athlete 2 (CM w/ arms): Athlete 2 (Concentric):W. Watch ( \\ Adobe Content Bb 102 x Bb 102998 Bb 102998 Bb 102998 (275) B G how to G how to R Ground Pattern CSA#3 D learn-us-east-1-prod-fleet01-xythos.content.blackboardcdn.com/blackboard.learn.xythos.pr... VPN E Subject 1 Countermovement 3500 3000 2500 2000 Force (N) 1500 1000 500 0 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 Time (ms)W. Watch ( Adobe , Content Bb 102998 Bb 102 X Bb 102998 Bb 102998 (275) B G how to G how to R Ground Pattern CSA#3 D learn-us-east-1-prod-fleet01-xythos.content.blackboardcdn.com/blackboard.learn.xythos.pr... VPN E Subject 1 Concentric Only 3500 3000 2500 2000 Force (N) 1500 1000 500 0 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 Time (ms)W. Watch ( Adobe Content Bb 102998 Bb 102998 Bb 102 X Bb 102998 (275) B G how to G how to R Ground Pattern CSA#3 D learn-us-east-1-prod-fleet01-xythos.content.blackboardcdn.com/blackboard.learn.xythos.prod, | VPN E Subject 2 Countermovement 3500 3000 2500 2000 Force (N) 1500 1000 500 0 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 Time (ms)W. Watch ( Adobe Content Bb 102998 Bb 102998 Bb 102998 Bb 102 x (275) B G how to G how to R Ground Pattern CSA#3 D learn-us-east-1-prod-fleet01-xythos.content.blackboardcdn.com/blackboard.learn.xythos.pr... VPN E Subject 2 Concentric Only 3000 2500 2000 Force (N) 1500 1000 500 0 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 Time (ms)