Explosive strength = the capacity to generate FORCE as QUICKLY (<200ms) as possible. Often quantified as rate of force development (RFD).
Impt bc it's FUNCTIONALLY more relevant than max strength - not just for athletes, but even unexpected perturbations in ADL.
Explosive strength influenced by speed of motor neuron recruitment &discharge rate.
Discharge rate reduced w/ disuse, aging, pathology but has HUGE adaptability to training.
How do you improve explosive strength?
- ballistic training (brief max/submax contractions followed by relaxation)
- explosive strength training (max concentric, intentional load acceleration)
- sensorimotor/perturbation training
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@MarkusWalden "ACL injuries in men's professional football: a 15-year prospective study on time trends and return-to-play rates reveals only 65% of players still play at the top level 3 years after ACL rupture" bjsm.bmj.com/content/50/12/…
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@MarkusWalden In their database:
- Few career-ending injuries (1.8%)
- Approx 7% retear rate w/in 1 yr post #ACLR
Are these re-injuries failures? Or a deliberate high-risk decision? Interesting question.
@DrKateWebster At ALL LEVELS OF PARTICIPATION, females are at greater risk for #ACL injury.
Overall, elite athletes: 83% return to pre-injury level
Elite females: Also 83%!
(incl handball, soccer, alpine skiing/snowboarding, basketball)
@DrKateWebster Time for RTS:
- No sex difference (Walden et al, KSSTA 2017)
- NCAA Division 1 soccer: cleared at 6 mths (Howard 2015)
- WNBA (Namdari 2011): 11.8 mths
Thread of my notes from the lectures to follow .....
@ACLStudyDay@Dusty_Grooms The brain functions as a hierarchy of networks that promote movement. Everything eventually links to the motor cortex.
Environmental context influences how well a patient looks in different environments.
@ACLStudyDay@Dusty_Grooms Neuroplasticity results in:
- incr cortical area assoc w/ the skill (the more you do a skill, the more your brain dedicates to it)
- new neuron support cells to facilitate skill
- improves neural efficiency (as ability incr, neural activity req decr for more complex tasks)
On to topic #2 from @ACLStudyDay home study session:
Return to run post-ACLR with @rwilly2003 ! Notes to follow in this thread...
@ACLStudyDay@rwilly2003 Resolving basic fundamentals is impt prior to running - edema, ROM, strength, etc - or these impairments may persist/be magnified once pt returns to running
@ACLStudyDay@rwilly2003 Recreational running may become exercise of choice for some athletes who choose NOT to return to pre-injury sport