As far as I’m concerned the most challenging of #thecoremaster exercises is being able to hold onto the The CoreMaster with one’s hands while lifting one foot off the ground. You can see how unstable I am yet this is the best I have done so far. This must be one of the most challenging instability exercises I know of. All else I can say is the more I persist the more stable I will become. #instabilitytraining #determinedtosucceed #mrdetermined #thecoremaster #advancedplank #coretrainingtothenextlevel https://www.instagram.com/p/CnAwVmQjBgN/?igshid=NGJjMDIxMWI=