Completely agree with everything said there and will add a couple of cents.
They are not audiophile headphones but now form an irreplaceable part of my lineup because they are the opposite - an extremely handy and comfy sound devices for when I am active.
The sound quality leaves a lot to be wished for on its own… BUT I have never noticed it in the 3 years that I have used it while running, cycling, or being in the gym. Our mind focuses on other stuff when exercising and the audio for that level of attention is perfect.
The weak spots are the lows and highs - jazz is not worth it and you miss the colour on the bass (i.e. only the thump), the mids are okay, which makes most rock/indie/pop good to listen to.
What others have said here is you could try and pair it up with earplugs. That does noticeably improve the sound quality and bass, while it’s no shame to ruin earplugs with sweat.