Burpees are one of the best movements for all-around muscle development and the best thing is you don't need any weights.

If you can perform a full burpee (from standing to the floor) then the benefits are huge. You can also scale and go from standing to plank position or use a swimming pool (stand in the pool near the edge, jump onto the ledge and then back into the pool and go into squat position underwater).

TURKISH GETUPS!!

Yes, heavy two-handed swings were a game-changer for me. I am a climber and I don't think it's any coincidence that 5.13- and V8 became "easy" after incorporating these into my routine. I had a very weak posterior chain. It's funny, when you do an actual sport-specific strength assessment, it often seems your weaknesses are not what you thought they were.