It must be stressed that things like max sprint exposure, acceleration/deceleration work, and higher speed runs must be practiced and progressed as the return gets closer.
Learn about hip and kinetic chain its importance in Martial Arts. If there is a weak link in this chain, then essentially you are losing force and striking power.
Periods of reduced training, or stopping altogether, can lead to a reduction in fitness. Learn how periods of inactivity will affect your fitness levels.