Page 1 of 9 1 2 3 4 5 6 ... LastLast
Results 1 to 10 of 89

Thread: How much knee flexion in depth jumps?

  1. #1

    How much knee flexion in depth jumps?

    i recently video taped my depth jumps, i was doing ground contacts of .2-.3 seconds, but i noticed my knee flexion got as high as maybe 100-110 degrees

    My question is how much knee flexion should i be aiming for in depth jumps?
    Does this signify something such as weak eccentric strength?

    thank you

  2. #2
    Got any photos/video? 100 degrees sounds like a lot. How high is the box?

  3. #3
    i think my interpretation of 100 degrees may be different from yours, my lowest point is well above parallel but still, in my opinion, significant knee flexion

    i will be posting a video shortly, thank you for you help.

  4. #4

  5. #5
    Didn't Prof. Verkhoshansky come out and say that optimal jumps have a longer coupling time?

  6. #6
    Quote Originally Posted by twhite03
    Didn't Prof. Verkhoshansky come out and say that optimal jumps have a longer coupling time?
    sorry, but i am a beginner with only basic knowledge, so.. what does that mean?

  7. #7
    Quote Originally Posted by 123456asdf
    Those look good to me.

    I think coupling time is the time period between the eccentric and concentric portion of a jump. Not easy to measure. You could generalize and say that the best jumps have a slightly conservative contact time (just like the jumps in your vid).

  8. #8
    Senior Member
    Join Date
    Nov 2003
    Location
    Charlotte N.C.
    Posts
    2,249
    The degree of knee flexion as well as coupling time must be specific to the reasoning behind the inclusion of depth jumps to the training program.

    To discuss such factors void of the context of addressing the target of training is a nebulous undertaking that will render all subsequent debate meaningless.

  9. #9
    Quote Originally Posted by James Smith
    The degree of knee flexion as well as coupling time must be specific to the reasoning behind the inclusion of depth jumps to the training program.

    To discuss such factors void of the context of addressing the target of training is a nebulous undertaking that will render all subsequent debate meaningless.
    Limiting this question to knee flexion and coupling time, what specific training effects are realized by changes in these two variables?

  10. #10
    Quote Originally Posted by twhite03
    Didn't Prof. Verkhoshansky come out and say that optimal jumps have a longer coupling time?
    Hes probably comparing force/ ground time trade off. Simple chemistry if ground time is too long kinetic energy dissipates as heat.

Similar Threads

  1. Powell & MVP to Australia
    By kitkat1 in forum In the News
    Replies: 5
    Last Post: 02-06-2009, 01:31 AM
  2. Tim gets 9 years!
    By Chris6878 in forum In the News
    Replies: 1
    Last Post: 10-10-2008, 04:54 PM
  3. under/overload
    By jalbert in forum Biomechanics and Physiology
    Replies: 4
    Last Post: 03-05-2003, 05:14 PM
  4. Whilst losing weight
    By maris in forum Nutrition Discussions
    Replies: 3
    Last Post: 02-20-2003, 05:44 PM
  5. Tripple Jump
    By Herb in forum Discussion Suggestions
    Replies: 5
    Last Post: 02-14-2003, 01:58 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •