7/28/2019 CMJS Presentation Final

1/19

CMJSPresentationRajan Middar Malcolm Daniels

Scott Porter

1

7/28/2019 CMJS Presentation Final

2/19

Contents Process Hypothesis Methods of Analysis

Collection Methods Results Potential Errors Conclusion Questions

2

7/28/2019 CMJS Presentation Final

3/19

Process Film two different members performing a CMJ

(60sec max)

Analyze videos using Kinovea

Complete several assignments using the data

3

7/28/2019 CMJS Presentation Final

4/19

HypothesisIf we perform CMJS for one minute thenour jump height will decline as time goes

on

4

Record 2 different video sets of 1:00 minute max.countermovement jump squats

Sagital perspective

Download the videos onto a computer and analyze

7/28/2019 CMJS Presentation Final

5/19

Methods of Analysis Video

Visual

Timing

Data recording

Photographic

5

7/28/2019 CMJS Presentation Final

6/19

Collection Methods Video replay

Kinovea

Microsoft Excel

Side by side photographic comparisons

6

7/28/2019 CMJS Presentation Final

7/19

Camera IPhone 4s

8.00 Megapixels

Records video with audio, at a rate of 30 framesper second

7

7/28/2019 CMJS Presentation Final

8/19

Kinovea Is a video player for all sport

Made to slow down and the technique of athletes

Allows users to view two videos side by side andsynchronize them at a common time

Allows measuring of distances and times

Provides tracking to follow values or trajectories of

athletes

8

7/28/2019 CMJS Presentation Final

9/19

Excel Spreadsheet program

Allows for recording of statistics

Capable of making charts and graph to showresults

9

7/28/2019 CMJS Presentation Final

10/19

First 10 accepted jumps:

All but 2 were < or = to 84

Last 10 accepted jumps:

Spikes to 103, 108, & 116

Total average joint angle: 84.8 degreesMin angle: 65 Max Angle: 116

10

Results - Malcolm Joint Angle

7/28/2019 CMJS Presentation Final

11/19

Results - MalcolmFirst 10 accepted jumps:

Roller coasters from 0.4 to 0.6

Last 10 accepted jumps:

Very inconsistent with spikes to 1.14 and 1.02

Total average flight time: 0.5Min. Flight time: 0.3 Max: 1.14

11

Flight Time

7/28/2019 CMJS Presentation Final

12/19

Results - MalcolmFirst 10 accepted jumps:

Average 0.34 peaks at 0.64

Last 10 accepted jumps:

The average drops to 0.24 (spikes to 1.59 and 1.28)

Total average jump height 0.34Min. Jump height: 0.27 Max: 1.59

12

Jump Height

7/28/2019 CMJS Presentation Final

13/19

First 10 accepted jumps:

5 measured at 90

Last 10 accepted jumps:

Spikes to 100, 102 & 108 Only one jump at 90

Total average joint angle: 94.1 degreesMin angle: 80 Max Angle: 108

13

Results - Scott Joint Angle

7/28/2019 CMJS Presentation Final

14/19

Results - ScottFirst 10 accepted jumps:

Ranges from .2 - .76

Last 10 accepted jumps:

Ranges from .19-.34

Total average flight time: 0.33Min. Flight time: 0.1 Max: 0.76

14

Flight Time

7/28/2019 CMJS Presentation Final

15/19

Results - ScottFirst 10 accepted jumps:

Average 0.16 peaks at 0.71

Last 10 accepted jumps:

6 jumps < 0.09

Total average jump height 0.16Min. Jump height: 0.01 Max: 0.71

15

Jump Height

7/28/2019 CMJS Presentation Final

16/19

Potential Errors Measuring angles in Kinovea Finding exact time for take off Finding exact time for flight

16

7/28/2019 CMJS Presentation Final

17/19

How to Increase Accuracy Solid background

Dark clothes and markers

Camera with tripod

Use a guide for jump height

17

7/28/2019 CMJS Presentation Final

18/19

Support/RejectHypothesis

Hypothesis: If we perform CMJS for one minute thenour jump height will decline as time goes on

According to our findings, fatigue negatively affects jump height

18

0

0.1

0.2

0.3

0.4

0.5

0 10 20 30 40 50 60

H e i g h

t ( m )

Number of Jumps

Jump Height vs Jump Number

Jump Height

7/28/2019 CMJS Presentation Final

19/19

Questions?

19