I had tremors on the full right side of my body once. Lasted for three months.
My hubby and I used to joke when my leg started shaking that I took earthquake pills like Willy E Coyote from the road runner cartoons. Still wasn't fun. Walking was sometimes hard because the leg would just keep on shaking.
Thankfully for me, they are gone. I do get muscle fatigue in my legs on occasion. Legs are weak, wobbly, and sometimes shake - but it's a different type of feeling then the tremors.
Descriptions are hard for me sometimes, but here goes. The best comparison I can come up with off the top of my head is guitar strings and rubberbands. The muscles were like guitar strings during the tremors. Still strong, but vibrate on occassion. Muscle fatigue is like a rubber band. Weak, wobbly, and yet can still vibrate.
Not sure if that made any sense, but it's the best I could think of.