They sell poles that go in the center of the pop up to prevent this. Cheap or expensive they will all collapse under enough weight. Put the pole up when you leave the blind and take it down when your hunting
The testosterone boost can make you go harder during your workouts than you realize. If your not on a decent supplement regiment, diet, and hitting your protein goals than that is what is probably causing muscle soreness and fatigue. Should be shooting for 1g protein per pound of your body...