Has anyone else gotten action tremors and eccentric movement tremors all over your body?

Anyone else developed tremors like shaking when you spread out your fingers or shaking when doing the lowering action of an ab workouts, or raising but then feeling shakiness when lowering your heels from a sitting position, or when lowering yourself during a pull up? This is a symptom that hasn't been acknowledged yet by the scientific community. But have seen many people here report it. Would also love to hear if anyone has ever fully recovered from this.