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Stick with heavy, low rep leaves. Again, this sounds dangerous to some, but number of simple is that higher reps tend to equal more injuries than low practice. If you're really afraid to go super heavy, work to a max of multiple teams of doubles and triples. Ok, finally we begin how, when, and simply how much to begin using these jumps. This is when most go horribly incorrectly recognized. Because there's no "weights" involved and you don't get that sore, wobbly leg feeling during jump training that you must do when Squatting, most assume they simple and can therefor