Thank you for putting forward your query.
These are nothing but essential tremors which occur after exertion or heavy exercise which happens due to muscular fatigue
and is the cause for pain. You need not worry about this.
Always before starting exercise, you may want to do warm up for 5 to 10 minutes and cool down for 5 to 10 minutes after exercise. Do not over exert yourself and drink plenty of water during the porcess.
Hope this answers your query.