i think yes,
Kiai is paralyzing/weakening shout that is practiced as part of Karate, probably other Martial Arts as well.
i was advised to shout HUNG Mantra as Kiai, Mantra that develops both Body (Affecting Mind first, then Speech & Body), as well as Fearlessness Aspect of Mind.
HUNG Mantra transforms Anger into Fearlessness.
had insight that i have Karateka's HUNG Mantra ... there was a time when i've impressed myself with HUNG Mantra in a Buddhist Center during Meditation.
let's remind ourselves that Martial Arts come from Ancient Shaolin, a Buddhist Monastery in Henan provice, China.
Karate comes from Okinawa, near Japan ... but it's roots date to Shaolin as well.
in Buddhism one focuses on Mind's development, then thoughts & feelings become Speech & Actions of the Body.
... just had insight that with proper Speech development, Body's development is better.
i think it's probably true.
therefore, developing Kiai also helps in developing Martial Artist's Body, because of it's roots in Shaolin & Buddhism.