Hello, I personally think that if you are 58 years old, you are not suitable for practicing nunchakus, especially for the purpose of fitness. Because nunchakus are fast, they require high strength and reaction, and it is not good for your bones and muscles to practice when you are old. Of course, if you especially like nunchakus, you can also practice it as an interest, just be careful not to use too much force and movement. Tai Ji Chuan is more suitable for the elderly to keep fit. Thank you, pure manual typing, I hope it can be adopted.