GalleriesAround the NPCClassic PhysiqueFeatured VideosFeaturesTrainingVideos NPC Photo Gym with J.M. Manion: NPC Competitors Dennis Jackson & Isaac McGinnis Back & Biceps Workout August 13, 2019 Share on Facebook Tweet on Twitter NPC Photo Gym with J.M. Manion: NPC Competitors Dennis Jackson & Isaac McGinnis Back & Biceps Workout