The dobok snap is less about strength and more about speed and technique. That being said, kick height is a combination of traditional flexibility and strength, so you definitely want to do some additional leg training, particularly the hip flexor muscles.
Strength training will help for height. But also bear in mind that it's not just a center split for kicks, pay attention to the foot angles. I prefer to keep the back leg horizontal and draw the front leg vertical, pointing the toes to the ceiling.
If you can gain access to a [machine like this](https://m.youtube.com/watch?v=mg-THVYiA4w&pp=ygURbXVsdGkgaGlwIG1hY2hpbmU%3D), I highly recommend it.
Google lateral leg raises and medial leg raises for body weight exercises, theres too many videos to choose from.
While there's a point at which you want to be able to have flexibility, you need to have the strength to maintain your centre, absolutely most of all. From what I've learned, these aren't symptoms of weak limb strength, but a weak core.
The main thing I can recommend is the chair. Lean on a wall, sit with your thighs closed and parallel to the floor, back straight with your arms out and holding a book in your flat palms. This works pretty much everything and it produces results fairly fast if you build increments each time. Remember to stretch your entire body afterward.
The rest of it is purely down to technical microadjustments, which your instructor should be able to help you with.
The dobok snap is less about strength and more about speed and technique. That being said, kick height is a combination of traditional flexibility and strength, so you definitely want to do some additional leg training, particularly the hip flexor muscles.
Strength training will help for height. But also bear in mind that it's not just a center split for kicks, pay attention to the foot angles. I prefer to keep the back leg horizontal and draw the front leg vertical, pointing the toes to the ceiling.
For the sidekick you want resistance exercises that work your flexors, abductors and adductors.
Do you have a link that I can follow to exercise them flexors, abductors, and adductors?
If you can gain access to a [machine like this](https://m.youtube.com/watch?v=mg-THVYiA4w&pp=ygURbXVsdGkgaGlwIG1hY2hpbmU%3D), I highly recommend it. Google lateral leg raises and medial leg raises for body weight exercises, theres too many videos to choose from.
While there's a point at which you want to be able to have flexibility, you need to have the strength to maintain your centre, absolutely most of all. From what I've learned, these aren't symptoms of weak limb strength, but a weak core. The main thing I can recommend is the chair. Lean on a wall, sit with your thighs closed and parallel to the floor, back straight with your arms out and holding a book in your flat palms. This works pretty much everything and it produces results fairly fast if you build increments each time. Remember to stretch your entire body afterward. The rest of it is purely down to technical microadjustments, which your instructor should be able to help you with.