Free Diving/Spearfishing

So when I was younger I used to be able to dive and hold my breath deep under water for minutes. Remembered how much I loved it and am getting back into it. I know there are competitions and stuff. Anyway I put on a lot of muscle since then and my breath holding ability has gone down a good bit even though I am training it. So any tips on getting better on free diving, also thread for general discussion on the fun of free diving snorkeling, spear fishing etc. Actually would love tips on how to get into spear fishing.

Know what shallow water blackout is. Don’t shoot anyone with a spear gun. Find a freediving forum. hah