Worm gear and rack and pinion.
I think it depends what club. At my kickboxing club I couldn't join until the age of six.
yes it will be good as it help each other as one can benefit the other. like if its two different martial arts but the same e.g striking like tae kwon do and kickboxing. for example tae kwon do will help in kickboxing, in tae kwon do it will help in kickboxing by giving the legs some flexibility and do some real damage with the legs, while kickboxing will help tae kwon do by giving you more endurance training and foot work. if you mean something like kickboxing and judo they will help each other in that kickboxing is good when you want to strike, move away from your opponent and keep your distance, and if that cant work atleast you got something like judo that will help you in close range when you feel that you cant strike, and will help you to get out of a situation when someone grabs you or want to take you down to the ground
kneeing is frobidden in kickboxing. It is allowed in K1-rules (but with no cllinch), and in muay thai.
Kickboxing as a combat sport, no. Kickboxing as a Martial Art yes.
what are the two main types of environment
there are two main types the marine and freshwater
The two main types of friction are kinetic and static.
The two main types of economy are Command and Traditional.
the two main types of communications are emailing and socialising
what are the two main types of environment
The main types are Serial and Parallel.
Metallic and non-metallic.
The two types of main ideas are stated and implied ones.
Aerobic fermentation and anaerobic fermentation are two main types.
The 2 main types of timber are Softwoods and Hardwoods.
The two main types of magma are mafic and felsic.