Our personal trainers care about your form and technique because perfect execution of an exercise can help to prevent injuries! In today’s #trainertips video our personal trainer Laura and her client Mike show you how to do a proper plank. 20 seconds is an awesome start to planks, how long can you hold a proper plank for? #plank #ymcavalpo #ymca #personaltraining #valpo #fitness #fitnessmotivation