Hello! I didn't know where to put this thread so I'm sorry if I posted this in the wrong section.
Below is a quote from the book "Never Gymless". My strength training is a complement to Muay thai. If I'm training the static holds for longer than 7 seconds it may have a negative influence on my speed. So for example if I do some FSP training (especially planche) could I limit the times to 7 seconds and do more sets so I'm sure not to hinder my speed? Or maybe I should stop the FSP training?
"Maximal strength can be trained with slightly longer contractions. When training
this strength quality, you can approach approximately 5 seconds of maximal
force contraction. This protocol is commonly referred to as maximal effort
isometrics.
At first glance, you may be thinking that 5 seconds is not enough time for
significant strength improvements. Five seconds offers plenty of time however
when you are putting forth a maximal effort. Longer duration (ex. 10+ seconds)
isometrics are usually not necessary. Such a protocol has been shown to
negatively influence speed, coordination, and muscle elasticity. To avoid these
effects, Verkhoshansky recommends limiting isometric contractions to no more
than six seconds (1977). The justification for this argument is simple, when you
understand that the training protocol for absolute strength varies significantly
from that of explosive strength.
Speed is essential in the combat sporting world. You cannot risk losing speed for
the sake of extended isometric holds. You will gain plenty of strength with 5
second contractions, without risking negative effects to speed qualities. Losing
even a split second of speed can be significant in the combat arena."