I tend not to feel good unless my body feels healthy and strong. My mental health is influenced by my physical health. It goes both ways, of course. People seek out feeling good through artificial means, such as drugs, pain killers, mind altering chemicals, and other forms of mediated reality. But they don’t usually give the body itself everything it needs, which is strengthening exercises.
Even if it’s just walking, which is as good as anything else. Walking, or hiking, can round out a complete exercise practice along with a package of various practices, such as stretching, qigong, single-basic exercises and tai chi form.
Don’t take my word for it. This is just my personal opinion. Take a walk. Walk until you have shifted your view from yourself to the countryside. By then your mind will be cleared and your body will feel better.