Smash through walls as you bulk up in this funny online muscle running game. Rush through each level as you avoid the bad obstacles and smash the smaller obstacles. Try to reach the end of each level in this crazy online 3D game. Muscle Run, muscle-building game, online game, arcade game, running game, obstacle course, 3D game, funny game, action game, mobile game, casual game, bulk up, speed, reflexes, challenges, obstacles, power-ups, free game