Hello, thank you for a great video! Just a quick question, if NordBord test is used for strength training , would higher impulse value represents higher activation of hamstring muscle (or hamstring eccentric force?)
Hi there. Thank you! Impulse is a function of force and time, so it could just be higher due to doing the Nordic over a longer time period... However, if we identify it isn't the time factor then it is a result of greater force output. This higher force output could be due to neural adaptations like you mention (i.e. increased muscle activation during eccentric contractions) but could also be due to structural adaptations (i.e. increase in biceps femoris fascicle length). We wouldn't know with the NHE data alone exactly which of these adaptations (or the combined magnitude of both types) was driving the increased force output. That said, it would ultimately represent an improvement in eccentric muscle strength. I hope that makes sense. Thank you for your comment!
@@globalperformanceinsights thanks a lot for your reply! It really makes sense, it’d be really interesting to see if there’s any research done in this topic!
@@choi6539 Absolutely. Here is one paper on the structural adaptations: www.sciencedirect.com/science/article/pii/S2095254621000995#:~:text=Biceps%20femoris%20long%20head%20fascicle,distal%20portion%20of%20the%20muscle. And here is one looking into the neural adaptations: link.springer.com/article/10.1007/s00421-015-3325-3
Hello, thank you for a great video!
Just a quick question,
if NordBord test is used for strength training , would higher impulse value represents higher activation of hamstring muscle (or hamstring eccentric force?)
Hi there. Thank you!
Impulse is a function of force and time, so it could just be higher due to doing the Nordic over a longer time period...
However, if we identify it isn't the time factor then it is a result of greater force output. This higher force output could be due to neural adaptations like you mention (i.e. increased muscle activation during eccentric contractions) but could also be due to structural adaptations (i.e. increase in biceps femoris fascicle length).
We wouldn't know with the NHE data alone exactly which of these adaptations (or the combined magnitude of both types) was driving the increased force output. That said, it would ultimately represent an improvement in eccentric muscle strength.
I hope that makes sense. Thank you for your comment!
@@globalperformanceinsights thanks a lot for your reply!
It really makes sense, it’d be really interesting to see if there’s any research done in this topic!
@@choi6539 Absolutely.
Here is one paper on the structural adaptations: www.sciencedirect.com/science/article/pii/S2095254621000995#:~:text=Biceps%20femoris%20long%20head%20fascicle,distal%20portion%20of%20the%20muscle.
And here is one looking into the neural adaptations:
link.springer.com/article/10.1007/s00421-015-3325-3