He can focus on progression, increasing the intensity and time he spends on the paddleboard. I use these fitness principles as well.
Answer:if I was you I would try and calm down take a few deep breaths and go for a short walk or something to try and keep your mind off of what's bothering you. Sometimes you just have to take a break because whatever is making your mental health bad could get worse if you dont try to talk to someone about it or try and clear your mind if it's your thoughts...
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