When I get gastro it's sayonara for me. 2 weeks easily out from the gym, lose at least 35% of my strength and takes twice as long to get back where I left off. The worse part is your a sititng duck, diet goes out of whack and metabolism undergoes a sudden change. But hey we get sick because we get it from the gym ie. people around us, touching the equipment
Nothing worse than feeling bad when you miss out on your workout sessions.
As mentioned in the above post, it gets stupidly hard as you get stronger and risks of injury are far greater too. I get paranoid about my lower back when doing squats and deadlifts. I even worry myself when doing heavy chest workouts since the shoulders can go bye bye too....