Hello there,
Well there could be multiple reasons for your loss of rhythm when running.....it could be the result of Tripack imbalance ie the three major muscle grp of leg which are required to work in rhythm for proper purposeful movement of leg...or else it could be the alternate rhythm imbalance ie the improper coordination of right and left leg during running movement.....
I have seen such type of cases in SAI.
Do get back online with exact symptoms for proper advice and treatment plan.
Regards.
Next Steps
Dr Raviraj Francis
MPTh(Rehab),MPT(MSk).UK