Old School Core Strength - Old School Weighted Isometric Leg Raise And 100 Flutter Kicks.

Johnny Grube doing a quick workout using an old school high school gym exercise called 6" inches, and he is using a 5 lb dumbbell to make the exercise a little harder.

Holding for 90 seconds.

Immediately going into 100
Flutter kicks.

So

90 second 6" hold holding a 5 lb dumbbell.

100 Flutter Kicks.

Short workouts should NOT be underestimated.

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