ooh-er
Actually- I used to use the heaviest punch bag as a plyometric exercise when I was missy no mates in the gym.
Stand in boxing stance close to the bag and explode the bag away like you were punching it, when it swings back allow your arm to retract and spring it away again. ta-da, you don't always need a partner or medicine ball. I'm sure one or two wondered what I was up to but I knew what I was doing

Feel free to use that.
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