Isometric Knuckle Pushups 5 Second Pushup Plank, 5 Second Mid Pushup Hold 40 LB Weight Vest 1 Min.

Johnny Grube doing a short work out doing isometric Knuckle pushups wearing a 40 lb weight vest for 1 minute. Finishing after Rogue fan bike sprints.

These pushups will build a special kind of strength.

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